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Merge tag 'v3.4-rc3' into staging/for_v3.5

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* tag 'v3.4-rc3': (3755 commits)
  Linux 3.4-rc3
  x86-32: fix up strncpy_from_user() sign error
  ARM: 7386/1: jump_label: fixup for rename to static_key
  ARM: 7384/1: ThumbEE: Disable userspace TEEHBR access for !CONFIG_ARM_THUMBEE
  ARM: 7382/1: mm: truncate memory banks to fit in 4GB space for classic MMU
  ARM: 7359/2: smp_twd: Only wait for reprogramming on active cpus
  PCI: Fix regression in pci_restore_state(), v3
  SCSI: Fix error handling when no ULD is attached
  ARM: OMAP: clock: cleanup CPUfreq leftovers, fix build errors
  ARM: dts: remove blank interrupt-parent properties
  ARM: EXYNOS: Fix Kconfig dependencies for device tree enabled machine files
  do not export kernel's NULL #define to userspace
  ARM: EXYNOS: Remove broken config values for touchscren for NURI board
  ARM: EXYNOS: set fix xusbxti clock for NURI and Universal210 boards
  ARM: EXYNOS: fix regulator name for NURI board
  ARM: SAMSUNG: make SAMSUNG_PM_DEBUG select DEBUG_LL
  cpufreq: OMAP: fix build errors: depends on ARCH_OMAP2PLUS
  sparc64: Eliminate obsolete __handle_softirq() function
  sparc64: Fix bootup crash on sun4v.
  ARM: msm: Fix section mismatches in proc_comm.c
  ...
This commit is contained in:
Mauro Carvalho Chehab
2012-04-19 09:23:28 -03:00
parent 32898a1454 e816b57a33
commit d5aeee8cb2
5693 changed files with 147299 additions and 73259 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/Kconfig.locks
+2 -2
View File
@@ -124,8 +124,8 @@ config INLINE_SPIN_LOCK_IRQSAVE
def_bool !DEBUG_SPINLOCK && !GENERIC_LOCKBREAK && \
ARCH_INLINE_SPIN_LOCK_IRQSAVE
config INLINE_SPIN_UNLOCK
def_bool !DEBUG_SPINLOCK && (!PREEMPT || ARCH_INLINE_SPIN_UNLOCK)
config UNINLINE_SPIN_UNLOCK
bool
config INLINE_SPIN_UNLOCK_BH
def_bool !DEBUG_SPINLOCK && ARCH_INLINE_SPIN_UNLOCK_BH
kernel/Kconfig.preempt
+1
View File
@@ -36,6 +36,7 @@ config PREEMPT_VOLUNTARY
config PREEMPT
bool "Preemptible Kernel (Low-Latency Desktop)"
select PREEMPT_COUNT
select UNINLINE_SPIN_UNLOCK if !ARCH_INLINE_SPIN_UNLOCK
help
This option reduces the latency of the kernel by making
all kernel code (that is not executing in a critical section)
kernel/Makefile
-1
View File
@@ -27,7 +27,6 @@ obj-y += power/
obj-$(CONFIG_FREEZER) += freezer.o
obj-$(CONFIG_PROFILING) += profile.o
obj-$(CONFIG_SYSCTL_SYSCALL_CHECK) += sysctl_check.o
obj-$(CONFIG_STACKTRACE) += stacktrace.o
obj-y += time/
obj-$(CONFIG_DEBUG_MUTEXES) += mutex-debug.o
kernel/cgroup.c
+1 -1
View File
@@ -1883,7 +1883,7 @@ static void cgroup_task_migrate(struct cgroup *cgrp, struct cgroup *oldcgrp,
*/
int cgroup_attach_task(struct cgroup *cgrp, struct task_struct *tsk)
{
int retval;
int retval = 0;
struct cgroup_subsys *ss, *failed_ss = NULL;
struct cgroup *oldcgrp;
struct cgroupfs_root *root = cgrp->root;
kernel/compat.c
+60 -8
View File
@@ -31,11 +31,10 @@
#include <asm/uaccess.h>
/*
* Note that the native side is already converted to a timespec, because
* that's what we want anyway.
* Get/set struct timeval with struct timespec on the native side
*/
static int compat_get_timeval(struct timespec *o,
struct compat_timeval __user *i)
static int compat_get_timeval_convert(struct timespec *o,
struct compat_timeval __user *i)
{
long usec;
@@ -46,8 +45,8 @@ static int compat_get_timeval(struct timespec *o,
return 0;
}
static int compat_put_timeval(struct compat_timeval __user *o,
struct timeval *i)
static int compat_put_timeval_convert(struct compat_timeval __user *o,
struct timeval *i)
{
return (put_user(i->tv_sec, &o->tv_sec) ||
put_user(i->tv_usec, &o->tv_usec)) ? -EFAULT : 0;
@@ -117,7 +116,7 @@ asmlinkage long compat_sys_gettimeofday(struct compat_timeval __user *tv,
if (tv) {
struct timeval ktv;
do_gettimeofday(&ktv);
if (compat_put_timeval(tv, &ktv))
if (compat_put_timeval_convert(tv, &ktv))
return -EFAULT;
}
if (tz) {
@@ -135,7 +134,7 @@ asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
struct timezone ktz;
if (tv) {
if (compat_get_timeval(&kts, tv))
if (compat_get_timeval_convert(&kts, tv))
return -EFAULT;
}
if (tz) {
@@ -146,12 +145,29 @@ asmlinkage long compat_sys_settimeofday(struct compat_timeval __user *tv,
return do_sys_settimeofday(tv ? &kts : NULL, tz ? &ktz : NULL);
}
int get_compat_timeval(struct timeval *tv, const struct compat_timeval __user *ctv)
{
return (!access_ok(VERIFY_READ, ctv, sizeof(*ctv)) ||
__get_user(tv->tv_sec, &ctv->tv_sec) ||
__get_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0;
}
EXPORT_SYMBOL_GPL(get_compat_timeval);
int put_compat_timeval(const struct timeval *tv, struct compat_timeval __user *ctv)
{
return (!access_ok(VERIFY_WRITE, ctv, sizeof(*ctv)) ||
__put_user(tv->tv_sec, &ctv->tv_sec) ||
__put_user(tv->tv_usec, &ctv->tv_usec)) ? -EFAULT : 0;
}
EXPORT_SYMBOL_GPL(put_compat_timeval);
int get_compat_timespec(struct timespec *ts, const struct compat_timespec __user *cts)
{
return (!access_ok(VERIFY_READ, cts, sizeof(*cts)) ||
__get_user(ts->tv_sec, &cts->tv_sec) ||
__get_user(ts->tv_nsec, &cts->tv_nsec)) ? -EFAULT : 0;
}
EXPORT_SYMBOL_GPL(get_compat_timespec);
int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user *cts)
{
@@ -161,6 +177,42 @@ int put_compat_timespec(const struct timespec *ts, struct compat_timespec __user
}
EXPORT_SYMBOL_GPL(put_compat_timespec);
int compat_get_timeval(struct timeval *tv, const void __user *utv)
{
if (COMPAT_USE_64BIT_TIME)
return copy_from_user(tv, utv, sizeof *tv) ? -EFAULT : 0;
else
return get_compat_timeval(tv, utv);
}
EXPORT_SYMBOL_GPL(compat_get_timeval);
int compat_put_timeval(const struct timeval *tv, void __user *utv)
{
if (COMPAT_USE_64BIT_TIME)
return copy_to_user(utv, tv, sizeof *tv) ? -EFAULT : 0;
else
return put_compat_timeval(tv, utv);
}
EXPORT_SYMBOL_GPL(compat_put_timeval);
int compat_get_timespec(struct timespec *ts, const void __user *uts)
{
if (COMPAT_USE_64BIT_TIME)
return copy_from_user(ts, uts, sizeof *ts) ? -EFAULT : 0;
else
return get_compat_timespec(ts, uts);
}
EXPORT_SYMBOL_GPL(compat_get_timespec);
int compat_put_timespec(const struct timespec *ts, void __user *uts)
{
if (COMPAT_USE_64BIT_TIME)
return copy_to_user(uts, ts, sizeof *ts) ? -EFAULT : 0;
else
return put_compat_timespec(ts, uts);
}
EXPORT_SYMBOL_GPL(compat_put_timespec);
static long compat_nanosleep_restart(struct restart_block *restart)
{
struct compat_timespec __user *rmtp;
kernel/cpuset.c
+9 -22
View File
@@ -270,11 +270,11 @@ static struct file_system_type cpuset_fs_type = {
* are online. If none are online, walk up the cpuset hierarchy
* until we find one that does have some online cpus. If we get
* all the way to the top and still haven't found any online cpus,
* return cpu_online_map. Or if passed a NULL cs from an exit'ing
* task, return cpu_online_map.
* return cpu_online_mask. Or if passed a NULL cs from an exit'ing
* task, return cpu_online_mask.
*
* One way or another, we guarantee to return some non-empty subset
* of cpu_online_map.
* of cpu_online_mask.
*
* Call with callback_mutex held.
*/
@@ -867,7 +867,7 @@ static int update_cpumask(struct cpuset *cs, struct cpuset *trialcs,
int retval;
int is_load_balanced;
/* top_cpuset.cpus_allowed tracks cpu_online_map; it's read-only */
/* top_cpuset.cpus_allowed tracks cpu_online_mask; it's read-only */
if (cs == &top_cpuset)
return -EACCES;
@@ -2149,7 +2149,7 @@ void __init cpuset_init_smp(void)
*
* Description: Returns the cpumask_var_t cpus_allowed of the cpuset
* attached to the specified @tsk. Guaranteed to return some non-empty
* subset of cpu_online_map, even if this means going outside the
* subset of cpu_online_mask, even if this means going outside the
* tasks cpuset.
**/
@@ -2162,10 +2162,9 @@ void cpuset_cpus_allowed(struct task_struct *tsk, struct cpumask *pmask)
mutex_unlock(&callback_mutex);
}
int cpuset_cpus_allowed_fallback(struct task_struct *tsk)
void cpuset_cpus_allowed_fallback(struct task_struct *tsk)
{
const struct cpuset *cs;
int cpu;
rcu_read_lock();
cs = task_cs(tsk);
@@ -2186,22 +2185,10 @@ int cpuset_cpus_allowed_fallback(struct task_struct *tsk)
* changes in tsk_cs()->cpus_allowed. Otherwise we can temporary
* set any mask even if it is not right from task_cs() pov,
* the pending set_cpus_allowed_ptr() will fix things.
*
* select_fallback_rq() will fix things ups and set cpu_possible_mask
* if required.
*/
cpu = cpumask_any_and(&tsk->cpus_allowed, cpu_active_mask);
if (cpu >= nr_cpu_ids) {
/*
* Either tsk->cpus_allowed is wrong (see above) or it
* is actually empty. The latter case is only possible
* if we are racing with remove_tasks_in_empty_cpuset().
* Like above we can temporary set any mask and rely on
* set_cpus_allowed_ptr() as synchronization point.
*/
do_set_cpus_allowed(tsk, cpu_possible_mask);
cpu = cpumask_any(cpu_active_mask);
}
return cpu;
}
void cpuset_init_current_mems_allowed(void)
kernel/cred.c
+2
View File
@@ -386,6 +386,8 @@ int copy_creds(struct task_struct *p, unsigned long clone_flags)
struct cred *new;
int ret;
p->replacement_session_keyring = NULL;
if (
#ifdef CONFIG_KEYS
!p->cred->thread_keyring &&
kernel/debug/debug_core.c
+24 -30
View File
@@ -53,7 +53,6 @@
#include <asm/cacheflush.h>
#include <asm/byteorder.h>
#include <linux/atomic.h>
#include <asm/system.h>
#include "debug_core.h"
@@ -161,37 +160,39 @@ early_param("nokgdbroundup", opt_nokgdbroundup);
* Weak aliases for breakpoint management,
* can be overriden by architectures when needed:
*/
int __weak kgdb_arch_set_breakpoint(unsigned long addr, char *saved_instr)
int __weak kgdb_arch_set_breakpoint(struct kgdb_bkpt *bpt)
{
int err;
err = probe_kernel_read(saved_instr, (char *)addr, BREAK_INSTR_SIZE);
err = probe_kernel_read(bpt->saved_instr, (char *)bpt->bpt_addr,
BREAK_INSTR_SIZE);
if (err)
return err;
return probe_kernel_write((char *)addr, arch_kgdb_ops.gdb_bpt_instr,
BREAK_INSTR_SIZE);
err = probe_kernel_write((char *)bpt->bpt_addr,
arch_kgdb_ops.gdb_bpt_instr, BREAK_INSTR_SIZE);
return err;
}
int __weak kgdb_arch_remove_breakpoint(unsigned long addr, char *bundle)
int __weak kgdb_arch_remove_breakpoint(struct kgdb_bkpt *bpt)
{
return probe_kernel_write((char *)addr,
(char *)bundle, BREAK_INSTR_SIZE);
return probe_kernel_write((char *)bpt->bpt_addr,
(char *)bpt->saved_instr, BREAK_INSTR_SIZE);
}
int __weak kgdb_validate_break_address(unsigned long addr)
{
char tmp_variable[BREAK_INSTR_SIZE];
struct kgdb_bkpt tmp;
int err;
/* Validate setting the breakpoint and then removing it. In the
/* Validate setting the breakpoint and then removing it. If the
* remove fails, the kernel needs to emit a bad message because we
* are deep trouble not being able to put things back the way we
* found them.
*/
err = kgdb_arch_set_breakpoint(addr, tmp_variable);
tmp.bpt_addr = addr;
err = kgdb_arch_set_breakpoint(&tmp);
if (err)
return err;
err = kgdb_arch_remove_breakpoint(addr, tmp_variable);
err = kgdb_arch_remove_breakpoint(&tmp);
if (err)
printk(KERN_ERR "KGDB: Critical breakpoint error, kernel "
"memory destroyed at: %lx", addr);
@@ -235,7 +236,6 @@ static void kgdb_flush_swbreak_addr(unsigned long addr)
*/
int dbg_activate_sw_breakpoints(void)
{
unsigned long addr;
int error;
int ret = 0;
int i;
@@ -244,16 +244,15 @@ int dbg_activate_sw_breakpoints(void)
if (kgdb_break[i].state != BP_SET)
continue;
addr = kgdb_break[i].bpt_addr;
error = kgdb_arch_set_breakpoint(addr,
kgdb_break[i].saved_instr);
error = kgdb_arch_set_breakpoint(&kgdb_break[i]);
if (error) {
ret = error;
printk(KERN_INFO "KGDB: BP install failed: %lx", addr);
printk(KERN_INFO "KGDB: BP install failed: %lx",
kgdb_break[i].bpt_addr);
continue;
}
kgdb_flush_swbreak_addr(addr);
kgdb_flush_swbreak_addr(kgdb_break[i].bpt_addr);
kgdb_break[i].state = BP_ACTIVE;
}
return ret;
@@ -302,7 +301,6 @@ int dbg_set_sw_break(unsigned long addr)
int dbg_deactivate_sw_breakpoints(void)
{
unsigned long addr;
int error;
int ret = 0;
int i;
@@ -310,15 +308,14 @@ int dbg_deactivate_sw_breakpoints(void)
for (i = 0; i < KGDB_MAX_BREAKPOINTS; i++) {
if (kgdb_break[i].state != BP_ACTIVE)
continue;
addr = kgdb_break[i].bpt_addr;
error = kgdb_arch_remove_breakpoint(addr,
kgdb_break[i].saved_instr);
error = kgdb_arch_remove_breakpoint(&kgdb_break[i]);
if (error) {
printk(KERN_INFO "KGDB: BP remove failed: %lx\n", addr);
printk(KERN_INFO "KGDB: BP remove failed: %lx\n",
kgdb_break[i].bpt_addr);
ret = error;
}
kgdb_flush_swbreak_addr(addr);
kgdb_flush_swbreak_addr(kgdb_break[i].bpt_addr);
kgdb_break[i].state = BP_SET;
}
return ret;
@@ -352,7 +349,6 @@ int kgdb_isremovedbreak(unsigned long addr)
int dbg_remove_all_break(void)
{
unsigned long addr;
int error;
int i;
@@ -360,12 +356,10 @@ int dbg_remove_all_break(void)
for (i = 0; i < KGDB_MAX_BREAKPOINTS; i++) {
if (kgdb_break[i].state != BP_ACTIVE)
goto setundefined;
addr = kgdb_break[i].bpt_addr;
error = kgdb_arch_remove_breakpoint(addr,
kgdb_break[i].saved_instr);
error = kgdb_arch_remove_breakpoint(&kgdb_break[i]);
if (error)
printk(KERN_ERR "KGDB: breakpoint remove failed: %lx\n",
addr);
kgdb_break[i].bpt_addr);
setundefined:
kgdb_break[i].state = BP_UNDEFINED;
}
kernel/debug/kdb/kdb_bt.c
-1
View File
@@ -15,7 +15,6 @@
#include <linux/sched.h>
#include <linux/kdb.h>
#include <linux/nmi.h>
#include <asm/system.h>
#include "kdb_private.h"
kernel/debug/kdb/kdb_io.c
+1 -1
View File
@@ -743,7 +743,7 @@ kdb_printit:
kdb_input_flush();
c = console_drivers;
if (!dbg_io_ops->is_console) {
if (dbg_io_ops && !dbg_io_ops->is_console) {
len = strlen(moreprompt);
cp = moreprompt;
while (len--) {
kernel/dma.c
-1
View File
@@ -18,7 +18,6 @@
#include <linux/proc_fs.h>
#include <linux/init.h>
#include <asm/dma.h>
#include <asm/system.h>
kernel/events/core.c
+9 -2
View File
@@ -3348,7 +3348,7 @@ static void calc_timer_values(struct perf_event *event,
*running = ctx_time - event->tstamp_running;
}
void __weak perf_update_user_clock(struct perf_event_mmap_page *userpg, u64 now)
void __weak arch_perf_update_userpage(struct perf_event_mmap_page *userpg, u64 now)
{
}
@@ -3398,7 +3398,7 @@ void perf_event_update_userpage(struct perf_event *event)
userpg->time_running = running +
atomic64_read(&event->child_total_time_running);
perf_update_user_clock(userpg, now);
arch_perf_update_userpage(userpg, now);
barrier();
++userpg->lock;
@@ -7116,6 +7116,13 @@ void __init perf_event_init(void)
/* do not patch jump label more than once per second */
jump_label_rate_limit(&perf_sched_events, HZ);
/*
* Build time assertion that we keep the data_head at the intended
* location. IOW, validation we got the __reserved[] size right.
*/
BUILD_BUG_ON((offsetof(struct perf_event_mmap_page, data_head))
!= 1024);
}
static int __init perf_event_sysfs_init(void)
kernel/exit.c
+1 -1
View File
@@ -474,7 +474,7 @@ static void close_files(struct files_struct * files)
i = j * __NFDBITS;
if (i >= fdt->max_fds)
break;
set = fdt->open_fds->fds_bits[j++];
set = fdt->open_fds[j++];
while (set) {
if (set & 1) {
struct file * file = xchg(&fdt->fd[i], NULL);
kernel/futex.c
+16 -24
View File
@@ -59,6 +59,7 @@
#include <linux/magic.h>
#include <linux/pid.h>
#include <linux/nsproxy.h>
#include <linux/ptrace.h>
#include <asm/futex.h>
@@ -2443,40 +2444,31 @@ SYSCALL_DEFINE3(get_robust_list, int, pid,
{
struct robust_list_head __user *head;
unsigned long ret;
const struct cred *cred = current_cred(), *pcred;
struct task_struct *p;
if (!futex_cmpxchg_enabled)
return -ENOSYS;
if (!pid)
head = current->robust_list;
else {
struct task_struct *p;
WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n");
ret = -ESRCH;
rcu_read_lock();
rcu_read_lock();
ret = -ESRCH;
if (!pid)
p = current;
else {
p = find_task_by_vpid(pid);
if (!p)
goto err_unlock;
ret = -EPERM;
pcred = __task_cred(p);
/* If victim is in different user_ns, then uids are not
comparable, so we must have CAP_SYS_PTRACE */
if (cred->user->user_ns != pcred->user->user_ns) {
if (!ns_capable(pcred->user->user_ns, CAP_SYS_PTRACE))
goto err_unlock;
goto ok;
}
/* If victim is in same user_ns, then uids are comparable */
if (cred->euid != pcred->euid &&
cred->euid != pcred->uid &&
!ns_capable(pcred->user->user_ns, CAP_SYS_PTRACE))
goto err_unlock;
ok:
head = p->robust_list;
rcu_read_unlock();
}
ret = -EPERM;
if (!ptrace_may_access(p, PTRACE_MODE_READ))
goto err_unlock;
head = p->robust_list;
rcu_read_unlock();
if (put_user(sizeof(*head), len_ptr))
return -EFAULT;
return put_user(head, head_ptr);
kernel/futex_compat.c
+16 -24
View File
@@ -10,6 +10,7 @@
#include <linux/compat.h>
#include <linux/nsproxy.h>
#include <linux/futex.h>
#include <linux/ptrace.h>
#include <asm/uaccess.h>
@@ -136,40 +137,31 @@ compat_sys_get_robust_list(int pid, compat_uptr_t __user *head_ptr,
{
struct compat_robust_list_head __user *head;
unsigned long ret;
const struct cred *cred = current_cred(), *pcred;
struct task_struct *p;
if (!futex_cmpxchg_enabled)
return -ENOSYS;
if (!pid)
head = current->compat_robust_list;
else {
struct task_struct *p;
WARN_ONCE(1, "deprecated: get_robust_list will be deleted in 2013.\n");
ret = -ESRCH;
rcu_read_lock();
rcu_read_lock();
ret = -ESRCH;
if (!pid)
p = current;
else {
p = find_task_by_vpid(pid);
if (!p)
goto err_unlock;
ret = -EPERM;
pcred = __task_cred(p);
/* If victim is in different user_ns, then uids are not
comparable, so we must have CAP_SYS_PTRACE */
if (cred->user->user_ns != pcred->user->user_ns) {
if (!ns_capable(pcred->user->user_ns, CAP_SYS_PTRACE))
goto err_unlock;
goto ok;
}
/* If victim is in same user_ns, then uids are comparable */
if (cred->euid != pcred->euid &&
cred->euid != pcred->uid &&
!ns_capable(pcred->user->user_ns, CAP_SYS_PTRACE))
goto err_unlock;
ok:
head = p->compat_robust_list;
rcu_read_unlock();
}
ret = -EPERM;
if (!ptrace_may_access(p, PTRACE_MODE_READ))
goto err_unlock;
head = p->compat_robust_list;
rcu_read_unlock();
if (put_user(sizeof(*head), len_ptr))
return -EFAULT;
return put_user(ptr_to_compat(head), head_ptr);
kernel/irq/Kconfig
+12 -3
View File
@@ -13,7 +13,7 @@ config GENERIC_HARDIRQS
# Options selectable by the architecture code
# Make sparse irq Kconfig switch below available
config HAVE_SPARSE_IRQ
config MAY_HAVE_SPARSE_IRQ
bool
# Enable the generic irq autoprobe mechanism
@@ -56,13 +56,22 @@ config GENERIC_IRQ_CHIP
config IRQ_DOMAIN
bool
config IRQ_DOMAIN_DEBUG
bool "Expose hardware/virtual IRQ mapping via debugfs"
depends on IRQ_DOMAIN && DEBUG_FS
help
This option will show the mapping relationship between hardware irq
numbers and Linux irq numbers. The mapping is exposed via debugfs
in the file "irq_domain_mapping".
If you don't know what this means you don't need it.
# Support forced irq threading
config IRQ_FORCED_THREADING
bool
config SPARSE_IRQ
bool "Support sparse irq numbering"
depends on HAVE_SPARSE_IRQ
bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
---help---
Sparse irq numbering is useful for distro kernels that want
kernel/irq/handle.c
+10 -6
View File
@@ -54,14 +54,18 @@ static void warn_no_thread(unsigned int irq, struct irqaction *action)
static void irq_wake_thread(struct irq_desc *desc, struct irqaction *action)
{
/*
* Wake up the handler thread for this action. In case the
* thread crashed and was killed we just pretend that we
* handled the interrupt. The hardirq handler has disabled the
* device interrupt, so no irq storm is lurking. If the
* In case the thread crashed and was killed we just pretend that
* we handled the interrupt. The hardirq handler has disabled the
* device interrupt, so no irq storm is lurking.
*/
if (action->thread->flags & PF_EXITING)
return;
/*
* Wake up the handler thread for this action. If the
* RUNTHREAD bit is already set, nothing to do.
*/
if ((action->thread->flags & PF_EXITING) ||
test_and_set_bit(IRQTF_RUNTHREAD, &action->thread_flags))
if (test_and_set_bit(IRQTF_RUNTHREAD, &action->thread_flags))
return;
/*
kernel/irq/irqdomain.c
+21 -34
View File
@@ -23,7 +23,6 @@ static LIST_HEAD(irq_domain_list);
static DEFINE_MUTEX(irq_domain_mutex);
static DEFINE_MUTEX(revmap_trees_mutex);
static unsigned int irq_virq_count = NR_IRQS;
static struct irq_domain *irq_default_domain;
/**
@@ -184,13 +183,16 @@ struct irq_domain *irq_domain_add_linear(struct device_node *of_node,
}
struct irq_domain *irq_domain_add_nomap(struct device_node *of_node,
unsigned int max_irq,
const struct irq_domain_ops *ops,
void *host_data)
{
struct irq_domain *domain = irq_domain_alloc(of_node,
IRQ_DOMAIN_MAP_NOMAP, ops, host_data);
if (domain)
if (domain) {
domain->revmap_data.nomap.max_irq = max_irq ? max_irq : ~0;
irq_domain_add(domain);
}
return domain;
}
@@ -262,22 +264,6 @@ void irq_set_default_host(struct irq_domain *domain)
irq_default_domain = domain;
}
/**
* irq_set_virq_count() - Set the maximum number of linux irqs
* @count: number of linux irqs, capped with NR_IRQS
*
* This is mainly for use by platforms like iSeries who want to program
* the virtual irq number in the controller to avoid the reverse mapping
*/
void irq_set_virq_count(unsigned int count)
{
pr_debug("irq: Trying to set virq count to %d\n", count);
BUG_ON(count < NUM_ISA_INTERRUPTS);
if (count < NR_IRQS)
irq_virq_count = count;
}
static int irq_setup_virq(struct irq_domain *domain, unsigned int virq,
irq_hw_number_t hwirq)
{
@@ -320,13 +306,12 @@ unsigned int irq_create_direct_mapping(struct irq_domain *domain)
pr_debug("irq: create_direct virq allocation failed\n");
return 0;
}
if (virq >= irq_virq_count) {
if (virq >= domain->revmap_data.nomap.max_irq) {
pr_err("ERROR: no free irqs available below %i maximum\n",
irq_virq_count);
domain->revmap_data.nomap.max_irq);
irq_free_desc(virq);
return 0;
}
pr_debug("irq: create_direct obtained virq %d\n", virq);
if (irq_setup_virq(domain, virq, virq)) {
@@ -350,7 +335,8 @@ unsigned int irq_create_direct_mapping(struct irq_domain *domain)
unsigned int irq_create_mapping(struct irq_domain *domain,
irq_hw_number_t hwirq)
{
unsigned int virq, hint;
unsigned int hint;
int virq;
pr_debug("irq: irq_create_mapping(0x%p, 0x%lx)\n", domain, hwirq);
@@ -377,13 +363,13 @@ unsigned int irq_create_mapping(struct irq_domain *domain,
return irq_domain_legacy_revmap(domain, hwirq);
/* Allocate a virtual interrupt number */
hint = hwirq % irq_virq_count;
hint = hwirq % nr_irqs;
if (hint == 0)
hint++;
virq = irq_alloc_desc_from(hint, 0);
if (!virq)
if (virq <= 0)
virq = irq_alloc_desc_from(1, 0);
if (!virq) {
if (virq <= 0) {
pr_debug("irq: -> virq allocation failed\n");
return 0;
}
@@ -515,7 +501,7 @@ unsigned int irq_find_mapping(struct irq_domain *domain,
irq_hw_number_t hwirq)
{
unsigned int i;
unsigned int hint = hwirq % irq_virq_count;
unsigned int hint = hwirq % nr_irqs;
/* Look for default domain if nececssary */
if (domain == NULL)
@@ -536,7 +522,7 @@ unsigned int irq_find_mapping(struct irq_domain *domain,
if (data && (data->domain == domain) && (data->hwirq == hwirq))
return i;
i++;
if (i >= irq_virq_count)
if (i >= nr_irqs)
i = 1;
} while(i != hint);
return 0;
@@ -632,7 +618,7 @@ unsigned int irq_linear_revmap(struct irq_domain *domain,
return revmap[hwirq];
}
#ifdef CONFIG_VIRQ_DEBUG
#ifdef CONFIG_IRQ_DOMAIN_DEBUG
static int virq_debug_show(struct seq_file *m, void *private)
{
unsigned long flags;
@@ -642,8 +628,9 @@ static int virq_debug_show(struct seq_file *m, void *private)
void *data;
int i;
seq_printf(m, "%-5s %-7s %-15s %-18s %s\n", "virq", "hwirq",
"chip name", "chip data", "domain name");
seq_printf(m, "%-5s %-7s %-15s %-*s %s\n", "irq", "hwirq",
"chip name", (int)(2 * sizeof(void *) + 2), "chip data",
"domain name");
for (i = 1; i < nr_irqs; i++) {
desc = irq_to_desc(i);
@@ -666,9 +653,9 @@ static int virq_debug_show(struct seq_file *m, void *private)
seq_printf(m, "%-15s ", p);
data = irq_desc_get_chip_data(desc);
seq_printf(m, "0x%16p ", data);
seq_printf(m, data ? "0x%p " : " %p ", data);
if (desc->irq_data.domain->of_node)
if (desc->irq_data.domain && desc->irq_data.domain->of_node)
p = desc->irq_data.domain->of_node->full_name;
else
p = none;
@@ -695,14 +682,14 @@ static const struct file_operations virq_debug_fops = {
static int __init irq_debugfs_init(void)
{
if (debugfs_create_file("virq_mapping", S_IRUGO, powerpc_debugfs_root,
if (debugfs_create_file("irq_domain_mapping", S_IRUGO, NULL,
NULL, &virq_debug_fops) == NULL)
return -ENOMEM;
return 0;
}
__initcall(irq_debugfs_init);
#endif /* CONFIG_VIRQ_DEBUG */
#endif /* CONFIG_IRQ_DOMAIN_DEBUG */
int irq_domain_simple_map(struct irq_domain *d, unsigned int irq,
irq_hw_number_t hwirq)
kernel/irq/manage.c
+13 -6
View File
@@ -282,7 +282,7 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
{
struct irq_chip *chip = irq_desc_get_chip(desc);
struct cpumask *set = irq_default_affinity;
int ret;
int ret, node = desc->irq_data.node;
/* Excludes PER_CPU and NO_BALANCE interrupts */
if (!irq_can_set_affinity(irq))
@@ -301,6 +301,13 @@ setup_affinity(unsigned int irq, struct irq_desc *desc, struct cpumask *mask)
}
cpumask_and(mask, cpu_online_mask, set);
if (node != NUMA_NO_NODE) {
const struct cpumask *nodemask = cpumask_of_node(node);
/* make sure at least one of the cpus in nodemask is online */
if (cpumask_intersects(mask, nodemask))
cpumask_and(mask, mask, nodemask);
}
ret = chip->irq_set_affinity(&desc->irq_data, mask, false);
switch (ret) {
case IRQ_SET_MASK_OK:
@@ -645,7 +652,7 @@ static int irq_wait_for_interrupt(struct irqaction *action)
* is marked MASKED.
*/
static void irq_finalize_oneshot(struct irq_desc *desc,
struct irqaction *action, bool force)
struct irqaction *action)
{
if (!(desc->istate & IRQS_ONESHOT))
return;
@@ -679,7 +686,7 @@ again:
* we would clear the threads_oneshot bit of this thread which
* was just set.
*/
if (!force && test_bit(IRQTF_RUNTHREAD, &action->thread_flags))
if (test_bit(IRQTF_RUNTHREAD, &action->thread_flags))
goto out_unlock;
desc->threads_oneshot &= ~action->thread_mask;
@@ -739,7 +746,7 @@ irq_forced_thread_fn(struct irq_desc *desc, struct irqaction *action)
local_bh_disable();
ret = action->thread_fn(action->irq, action->dev_id);
irq_finalize_oneshot(desc, action, false);
irq_finalize_oneshot(desc, action);
local_bh_enable();
return ret;
}
@@ -755,7 +762,7 @@ static irqreturn_t irq_thread_fn(struct irq_desc *desc,
irqreturn_t ret;
ret = action->thread_fn(action->irq, action->dev_id);
irq_finalize_oneshot(desc, action, false);
irq_finalize_oneshot(desc, action);
return ret;
}
@@ -844,7 +851,7 @@ void exit_irq_thread(void)
wake_threads_waitq(desc);
/* Prevent a stale desc->threads_oneshot */
irq_finalize_oneshot(desc, action, true);
irq_finalize_oneshot(desc, action);
}
static void irq_setup_forced_threading(struct irqaction *new)
kernel/irq/migration.c
+7 -3
View File
@@ -43,12 +43,16 @@ void irq_move_masked_irq(struct irq_data *idata)
* masking the irqs.
*/
if (likely(cpumask_any_and(desc->pending_mask, cpu_online_mask)
< nr_cpu_ids))
if (!chip->irq_set_affinity(&desc->irq_data,
desc->pending_mask, false)) {
< nr_cpu_ids)) {
int ret = chip->irq_set_affinity(&desc->irq_data,
desc->pending_mask, false);
switch (ret) {
case IRQ_SET_MASK_OK:
cpumask_copy(desc->irq_data.affinity, desc->pending_mask);
case IRQ_SET_MASK_OK_NOCOPY:
irq_set_thread_affinity(desc);
}
}
cpumask_clear(desc->pending_mask);
}
kernel/irq_work.c
+2
View File
@@ -5,11 +5,13 @@
* context. The enqueueing is NMI-safe.
*/
#include <linux/bug.h>
#include <linux/kernel.h>
#include <linux/export.h>
#include <linux/irq_work.h>
#include <linux/percpu.h>
#include <linux/hardirq.h>
#include <linux/irqflags.h>
#include <asm/processor.h>
/*
kernel/itimer.c
+6 -2
View File
@@ -284,8 +284,12 @@ SYSCALL_DEFINE3(setitimer, int, which, struct itimerval __user *, value,
if (value) {
if(copy_from_user(&set_buffer, value, sizeof(set_buffer)))
return -EFAULT;
} else
memset((char *) &set_buffer, 0, sizeof(set_buffer));
} else {
memset(&set_buffer, 0, sizeof(set_buffer));
printk_once(KERN_WARNING "%s calls setitimer() with new_value NULL pointer."
" Misfeature support will be removed\n",
current->comm);
}
error = do_setitimer(which, &set_buffer, ovalue ? &get_buffer : NULL);
if (error || !ovalue)
kernel/kexec.c
+6 -1
View File
@@ -37,7 +37,6 @@
#include <asm/page.h>
#include <asm/uaccess.h>
#include <asm/io.h>
#include <asm/system.h>
#include <asm/sections.h>
/* Per cpu memory for storing cpu states in case of system crash. */
@@ -1359,6 +1358,10 @@ static int __init parse_crashkernel_simple(char *cmdline,
if (*cur == '@')
*crash_base = memparse(cur+1, &cur);
else if (*cur != ' ' && *cur != '\0') {
pr_warning("crashkernel: unrecognized char\n");
return -EINVAL;
}
return 0;
}
@@ -1462,7 +1465,9 @@ static int __init crash_save_vmcoreinfo_init(void)
VMCOREINFO_SYMBOL(init_uts_ns);
VMCOREINFO_SYMBOL(node_online_map);
#ifdef CONFIG_MMU
VMCOREINFO_SYMBOL(swapper_pg_dir);
#endif
VMCOREINFO_SYMBOL(_stext);
VMCOREINFO_SYMBOL(vmlist);
kernel/kmod.c
+159 -48
View File
@@ -60,6 +60,43 @@ static DECLARE_RWSEM(umhelper_sem);
*/
char modprobe_path[KMOD_PATH_LEN] = "/sbin/modprobe";
static void free_modprobe_argv(struct subprocess_info *info)
{
kfree(info->argv[3]); /* check call_modprobe() */
kfree(info->argv);
}
static int call_modprobe(char *module_name, int wait)
{
static char *envp[] = {
"HOME=/",
"TERM=linux",
"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
NULL
};
char **argv = kmalloc(sizeof(char *[5]), GFP_KERNEL);
if (!argv)
goto out;
module_name = kstrdup(module_name, GFP_KERNEL);
if (!module_name)
goto free_argv;
argv[0] = modprobe_path;
argv[1] = "-q";
argv[2] = "--";
argv[3] = module_name; /* check free_modprobe_argv() */
argv[4] = NULL;
return call_usermodehelper_fns(modprobe_path, argv, envp,
wait | UMH_KILLABLE, NULL, free_modprobe_argv, NULL);
free_argv:
kfree(argv);
out:
return -ENOMEM;
}
/**
* __request_module - try to load a kernel module
* @wait: wait (or not) for the operation to complete
@@ -81,11 +118,6 @@ int __request_module(bool wait, const char *fmt, ...)
char module_name[MODULE_NAME_LEN];
unsigned int max_modprobes;
int ret;
char *argv[] = { modprobe_path, "-q", "--", module_name, NULL };
static char *envp[] = { "HOME=/",
"TERM=linux",
"PATH=/sbin:/usr/sbin:/bin:/usr/bin",
NULL };
static atomic_t kmod_concurrent = ATOMIC_INIT(0);
#define MAX_KMOD_CONCURRENT 50 /* Completely arbitrary value - KAO */
static int kmod_loop_msg;
@@ -128,9 +160,7 @@ int __request_module(bool wait, const char *fmt, ...)
trace_module_request(module_name, wait, _RET_IP_);
ret = call_usermodehelper_fns(modprobe_path, argv, envp,
wait ? UMH_WAIT_PROC : UMH_WAIT_EXEC,
NULL, NULL, NULL);
ret = call_modprobe(module_name, wait ? UMH_WAIT_PROC : UMH_WAIT_EXEC);
atomic_dec(&kmod_concurrent);
return ret;
@@ -188,7 +218,7 @@ static int ____call_usermodehelper(void *data)
/* Exec failed? */
fail:
sub_info->retval = retval;
do_exit(0);
return 0;
}
void call_usermodehelper_freeinfo(struct subprocess_info *info)
@@ -199,6 +229,19 @@ void call_usermodehelper_freeinfo(struct subprocess_info *info)
}
EXPORT_SYMBOL(call_usermodehelper_freeinfo);
static void umh_complete(struct subprocess_info *sub_info)
{
struct completion *comp = xchg(&sub_info->complete, NULL);
/*
* See call_usermodehelper_exec(). If xchg() returns NULL
* we own sub_info, the UMH_KILLABLE caller has gone away.
*/
if (comp)
complete(comp);
else
call_usermodehelper_freeinfo(sub_info);
}
/* Keventd can't block, but this (a child) can. */
static int wait_for_helper(void *data)
{
@@ -235,7 +278,7 @@ static int wait_for_helper(void *data)
sub_info->retval = ret;
}
complete(sub_info->complete);
umh_complete(sub_info);
return 0;
}
@@ -244,7 +287,7 @@ static void __call_usermodehelper(struct work_struct *work)
{
struct subprocess_info *sub_info =
container_of(work, struct subprocess_info, work);
enum umh_wait wait = sub_info->wait;
int wait = sub_info->wait & ~UMH_KILLABLE;
pid_t pid;
/* CLONE_VFORK: wait until the usermode helper has execve'd
@@ -269,7 +312,7 @@ static void __call_usermodehelper(struct work_struct *work)
case UMH_WAIT_EXEC:
if (pid < 0)
sub_info->retval = pid;
complete(sub_info->complete);
umh_complete(sub_info);
}
}
@@ -279,7 +322,7 @@ static void __call_usermodehelper(struct work_struct *work)
* land has been frozen during a system-wide hibernation or suspend operation).
* Should always be manipulated under umhelper_sem acquired for write.
*/
static int usermodehelper_disabled = 1;
static enum umh_disable_depth usermodehelper_disabled = UMH_DISABLED;
/* Number of helpers running */
static atomic_t running_helpers = ATOMIC_INIT(0);
@@ -290,33 +333,111 @@ static atomic_t running_helpers = ATOMIC_INIT(0);
*/
static DECLARE_WAIT_QUEUE_HEAD(running_helpers_waitq);
/*
* Used by usermodehelper_read_lock_wait() to wait for usermodehelper_disabled
* to become 'false'.
*/
static DECLARE_WAIT_QUEUE_HEAD(usermodehelper_disabled_waitq);
/*
* Time to wait for running_helpers to become zero before the setting of
* usermodehelper_disabled in usermodehelper_disable() fails
*/
#define RUNNING_HELPERS_TIMEOUT (5 * HZ)
void read_lock_usermodehelper(void)
int usermodehelper_read_trylock(void)
{
down_read(&umhelper_sem);
}
EXPORT_SYMBOL_GPL(read_lock_usermodehelper);
DEFINE_WAIT(wait);
int ret = 0;
void read_unlock_usermodehelper(void)
down_read(&umhelper_sem);
for (;;) {
prepare_to_wait(&usermodehelper_disabled_waitq, &wait,
TASK_INTERRUPTIBLE);
if (!usermodehelper_disabled)
break;
if (usermodehelper_disabled == UMH_DISABLED)
ret = -EAGAIN;
up_read(&umhelper_sem);
if (ret)
break;
schedule();
try_to_freeze();
down_read(&umhelper_sem);
}
finish_wait(&usermodehelper_disabled_waitq, &wait);
return ret;
}
EXPORT_SYMBOL_GPL(usermodehelper_read_trylock);
long usermodehelper_read_lock_wait(long timeout)
{
DEFINE_WAIT(wait);
if (timeout < 0)
return -EINVAL;
down_read(&umhelper_sem);
for (;;) {
prepare_to_wait(&usermodehelper_disabled_waitq, &wait,
TASK_UNINTERRUPTIBLE);
if (!usermodehelper_disabled)
break;
up_read(&umhelper_sem);
timeout = schedule_timeout(timeout);
if (!timeout)
break;
down_read(&umhelper_sem);
}
finish_wait(&usermodehelper_disabled_waitq, &wait);
return timeout;
}
EXPORT_SYMBOL_GPL(usermodehelper_read_lock_wait);
void usermodehelper_read_unlock(void)
{
up_read(&umhelper_sem);
}
EXPORT_SYMBOL_GPL(read_unlock_usermodehelper);
EXPORT_SYMBOL_GPL(usermodehelper_read_unlock);
/**
* usermodehelper_disable - prevent new helpers from being started
* __usermodehelper_set_disable_depth - Modify usermodehelper_disabled.
* depth: New value to assign to usermodehelper_disabled.
*
* Change the value of usermodehelper_disabled (under umhelper_sem locked for
* writing) and wakeup tasks waiting for it to change.
*/
int usermodehelper_disable(void)
void __usermodehelper_set_disable_depth(enum umh_disable_depth depth)
{
down_write(&umhelper_sem);
usermodehelper_disabled = depth;
wake_up(&usermodehelper_disabled_waitq);
up_write(&umhelper_sem);
}
/**
* __usermodehelper_disable - Prevent new helpers from being started.
* @depth: New value to assign to usermodehelper_disabled.
*
* Set usermodehelper_disabled to @depth and wait for running helpers to exit.
*/
int __usermodehelper_disable(enum umh_disable_depth depth)
{
long retval;
if (!depth)
return -EINVAL;
down_write(&umhelper_sem);
usermodehelper_disabled = 1;
usermodehelper_disabled = depth;
up_write(&umhelper_sem);
/*
@@ -331,31 +452,10 @@ int usermodehelper_disable(void)
if (retval)
return 0;
down_write(&umhelper_sem);
usermodehelper_disabled = 0;
up_write(&umhelper_sem);
__usermodehelper_set_disable_depth(UMH_ENABLED);
return -EAGAIN;
}
/**
* usermodehelper_enable - allow new helpers to be started again
*/
void usermodehelper_enable(void)
{
down_write(&umhelper_sem);
usermodehelper_disabled = 0;
up_write(&umhelper_sem);
}
/**
* usermodehelper_is_disabled - check if new helpers are allowed to be started
*/
bool usermodehelper_is_disabled(void)
{
return usermodehelper_disabled;
}
EXPORT_SYMBOL_GPL(usermodehelper_is_disabled);
static void helper_lock(void)
{
atomic_inc(&running_helpers);
@@ -435,8 +535,7 @@ EXPORT_SYMBOL(call_usermodehelper_setfns);
* asynchronously if wait is not set, and runs as a child of keventd.
* (ie. it runs with full root capabilities).
*/
int call_usermodehelper_exec(struct subprocess_info *sub_info,
enum umh_wait wait)
int call_usermodehelper_exec(struct subprocess_info *sub_info, int wait)
{
DECLARE_COMPLETION_ONSTACK(done);
int retval = 0;
@@ -456,9 +555,21 @@ int call_usermodehelper_exec(struct subprocess_info *sub_info,
queue_work(khelper_wq, &sub_info->work);
if (wait == UMH_NO_WAIT) /* task has freed sub_info */
goto unlock;
wait_for_completion(&done);
retval = sub_info->retval;
if (wait & UMH_KILLABLE) {
retval = wait_for_completion_killable(&done);
if (!retval)
goto wait_done;
/* umh_complete() will see NULL and free sub_info */
if (xchg(&sub_info->complete, NULL))
goto unlock;
/* fallthrough, umh_complete() was already called */
}
wait_for_completion(&done);
wait_done:
retval = sub_info->retval;
out:
call_usermodehelper_freeinfo(sub_info);
unlock:
kernel/module.c
+34 -3
View File
@@ -105,6 +105,7 @@ struct list_head *kdb_modules = &modules; /* kdb needs the list of modules */
/* Block module loading/unloading? */
int modules_disabled = 0;
core_param(nomodule, modules_disabled, bint, 0);
/* Waiting for a module to finish initializing? */
static DECLARE_WAIT_QUEUE_HEAD(module_wq);
@@ -903,6 +904,36 @@ static ssize_t show_refcnt(struct module_attribute *mattr,
static struct module_attribute modinfo_refcnt =
__ATTR(refcnt, 0444, show_refcnt, NULL);
void __module_get(struct module *module)
{
if (module) {
preempt_disable();
__this_cpu_inc(module->refptr->incs);
trace_module_get(module, _RET_IP_);
preempt_enable();
}
}
EXPORT_SYMBOL(__module_get);
bool try_module_get(struct module *module)
{
bool ret = true;
if (module) {
preempt_disable();
if (likely(module_is_live(module))) {
__this_cpu_inc(module->refptr->incs);
trace_module_get(module, _RET_IP_);
} else
ret = false;
preempt_enable();
}
return ret;
}
EXPORT_SYMBOL(try_module_get);
void module_put(struct module *module)
{
if (module) {
@@ -2380,8 +2411,7 @@ static int copy_and_check(struct load_info *info,
return -ENOEXEC;
/* Suck in entire file: we'll want most of it. */
/* vmalloc barfs on "unusual" numbers. Check here */
if (len > 64 * 1024 * 1024 || (hdr = vmalloc(len)) == NULL)
if ((hdr = vmalloc(len)) == NULL)
return -ENOMEM;
if (copy_from_user(hdr, umod, len) != 0) {
@@ -2922,7 +2952,8 @@ static struct module *load_module(void __user *umod,
mutex_unlock(&module_mutex);
/* Module is ready to execute: parsing args may do that. */
err = parse_args(mod->name, mod->args, mod->kp, mod->num_kp, NULL);
err = parse_args(mod->name, mod->args, mod->kp, mod->num_kp,
-32768, 32767, NULL);
if (err < 0)
goto unlink;
kernel/padata.c
+9 -4
View File
@@ -1,6 +1,8 @@
/*
* padata.c - generic interface to process data streams in parallel
*
* See Documentation/padata.txt for an api documentation.
*
* Copyright (C) 2008, 2009 secunet Security Networks AG
* Copyright (C) 2008, 2009 Steffen Klassert <steffen.klassert@secunet.com>
*
@@ -354,13 +356,13 @@ static int padata_setup_cpumasks(struct parallel_data *pd,
if (!alloc_cpumask_var(&pd->cpumask.pcpu, GFP_KERNEL))
return -ENOMEM;
cpumask_and(pd->cpumask.pcpu, pcpumask, cpu_active_mask);
cpumask_and(pd->cpumask.pcpu, pcpumask, cpu_online_mask);
if (!alloc_cpumask_var(&pd->cpumask.cbcpu, GFP_KERNEL)) {
free_cpumask_var(pd->cpumask.cbcpu);
return -ENOMEM;
}
cpumask_and(pd->cpumask.cbcpu, cbcpumask, cpu_active_mask);
cpumask_and(pd->cpumask.cbcpu, cbcpumask, cpu_online_mask);
return 0;
}
@@ -564,7 +566,7 @@ EXPORT_SYMBOL(padata_unregister_cpumask_notifier);
static bool padata_validate_cpumask(struct padata_instance *pinst,
const struct cpumask *cpumask)
{
if (!cpumask_intersects(cpumask, cpu_active_mask)) {
if (!cpumask_intersects(cpumask, cpu_online_mask)) {
pinst->flags |= PADATA_INVALID;
return false;
}
@@ -678,7 +680,7 @@ static int __padata_add_cpu(struct padata_instance *pinst, int cpu)
{
struct parallel_data *pd;
if (cpumask_test_cpu(cpu, cpu_active_mask)) {
if (cpumask_test_cpu(cpu, cpu_online_mask)) {
pd = padata_alloc_pd(pinst, pinst->cpumask.pcpu,
pinst->cpumask.cbcpu);
if (!pd)
@@ -746,6 +748,9 @@ static int __padata_remove_cpu(struct padata_instance *pinst, int cpu)
return -ENOMEM;
padata_replace(pinst, pd);
cpumask_clear_cpu(cpu, pd->cpumask.cbcpu);
cpumask_clear_cpu(cpu, pd->cpumask.pcpu);
}
return 0;
kernel/panic.c
+1 -1
View File
@@ -97,7 +97,7 @@ void panic(const char *fmt, ...)
/*
* Avoid nested stack-dumping if a panic occurs during oops processing
*/
if (!oops_in_progress)
if (!test_taint(TAINT_DIE) && oops_in_progress <= 1)
dump_stack();
#endif
kernel/params.c
+14 -26
View File
@@ -15,7 +15,6 @@
along with this program; if not, write to the Free Software
Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/string.h>
#include <linux/errno.h>
@@ -88,6 +87,8 @@ static int parse_one(char *param,
char *val,
const struct kernel_param *params,
unsigned num_params,
s16 min_level,
s16 max_level,
int (*handle_unknown)(char *param, char *val))
{
unsigned int i;
@@ -96,6 +97,9 @@ static int parse_one(char *param,
/* Find parameter */
for (i = 0; i < num_params; i++) {
if (parameq(param, params[i].name)) {
if (params[i].level < min_level
|| params[i].level > max_level)
return 0;
/* No one handled NULL, so do it here. */
if (!val && params[i].ops->set != param_set_bool
&& params[i].ops->set != param_set_bint)
@@ -175,6 +179,8 @@ int parse_args(const char *name,
char *args,
const struct kernel_param *params,
unsigned num,
s16 min_level,
s16 max_level,
int (*unknown)(char *param, char *val))
{
char *param, *val;
@@ -190,7 +196,8 @@ int parse_args(const char *name,
args = next_arg(args, &param, &val);
irq_was_disabled = irqs_disabled();
ret = parse_one(param, val, params, num, unknown);
ret = parse_one(param, val, params, num,
min_level, max_level, unknown);
if (irq_was_disabled && !irqs_disabled()) {
printk(KERN_WARNING "parse_args(): option '%s' enabled "
"irq's!\n", param);
@@ -298,35 +305,18 @@ EXPORT_SYMBOL(param_ops_charp);
/* Actually could be a bool or an int, for historical reasons. */
int param_set_bool(const char *val, const struct kernel_param *kp)
{
bool v;
int ret;
/* No equals means "set"... */
if (!val) val = "1";
/* One of =[yYnN01] */
ret = strtobool(val, &v);
if (ret)
return ret;
if (kp->flags & KPARAM_ISBOOL)
*(bool *)kp->arg = v;
else
*(int *)kp->arg = v;
return 0;
return strtobool(val, kp->arg);
}
EXPORT_SYMBOL(param_set_bool);
int param_get_bool(char *buffer, const struct kernel_param *kp)
{
bool val;
if (kp->flags & KPARAM_ISBOOL)
val = *(bool *)kp->arg;
else
val = *(int *)kp->arg;
/* Y and N chosen as being relatively non-coder friendly */
return sprintf(buffer, "%c", val ? 'Y' : 'N');
return sprintf(buffer, "%c", *(bool *)kp->arg ? 'Y' : 'N');
}
EXPORT_SYMBOL(param_get_bool);
@@ -344,7 +334,6 @@ int param_set_invbool(const char *val, const struct kernel_param *kp)
struct kernel_param dummy;
dummy.arg = &boolval;
dummy.flags = KPARAM_ISBOOL;
ret = param_set_bool(val, &dummy);
if (ret == 0)
*(bool *)kp->arg = !boolval;
@@ -373,7 +362,6 @@ int param_set_bint(const char *val, const struct kernel_param *kp)
/* Match bool exactly, by re-using it. */
boolkp = *kp;
boolkp.arg = &v;
boolkp.flags |= KPARAM_ISBOOL;
ret = param_set_bool(val, &boolkp);
if (ret == 0)
@@ -394,7 +382,7 @@ static int param_array(const char *name,
unsigned int min, unsigned int max,
void *elem, int elemsize,
int (*set)(const char *, const struct kernel_param *kp),
u16 flags,
s16 level,
unsigned int *num)
{
int ret;
@@ -404,7 +392,7 @@ static int param_array(const char *name,
/* Get the name right for errors. */
kp.name = name;
kp.arg = elem;
kp.flags = flags;
kp.level = level;
*num = 0;
/* We expect a comma-separated list of values. */
@@ -445,7 +433,7 @@ static int param_array_set(const char *val, const struct kernel_param *kp)
unsigned int temp_num;
return param_array(kp->name, val, 1, arr->max, arr->elem,
arr->elemsize, arr->ops->set, kp->flags,
arr->elemsize, arr->ops->set, kp->level,
arr->num ?: &temp_num);
}
kernel/pid_namespace.c
+35 -6
View File
@@ -15,6 +15,7 @@
#include <linux/acct.h>
#include <linux/slab.h>
#include <linux/proc_fs.h>
#include <linux/reboot.h>
#define BITS_PER_PAGE (PAGE_SIZE*8)
@@ -168,13 +169,9 @@ void zap_pid_ns_processes(struct pid_namespace *pid_ns)
while (nr > 0) {
rcu_read_lock();
/*
* Any nested-container's init processes won't ignore the
* SEND_SIG_NOINFO signal, see send_signal()->si_fromuser().
*/
task = pid_task(find_vpid(nr), PIDTYPE_PID);
if (task)
send_sig_info(SIGKILL, SEND_SIG_NOINFO, task);
if (task && !__fatal_signal_pending(task))
send_sig_info(SIGKILL, SEND_SIG_FORCED, task);
rcu_read_unlock();
@@ -187,6 +184,9 @@ void zap_pid_ns_processes(struct pid_namespace *pid_ns)
rc = sys_wait4(-1, NULL, __WALL, NULL);
} while (rc != -ECHILD);
if (pid_ns->reboot)
current->signal->group_exit_code = pid_ns->reboot;
acct_exit_ns(pid_ns);
return;
}
@@ -221,6 +221,35 @@ static struct ctl_table pid_ns_ctl_table[] = {
static struct ctl_path kern_path[] = { { .procname = "kernel", }, { } };
int reboot_pid_ns(struct pid_namespace *pid_ns, int cmd)
{
if (pid_ns == &init_pid_ns)
return 0;
switch (cmd) {
case LINUX_REBOOT_CMD_RESTART2:
case LINUX_REBOOT_CMD_RESTART:
pid_ns->reboot = SIGHUP;
break;
case LINUX_REBOOT_CMD_POWER_OFF:
case LINUX_REBOOT_CMD_HALT:
pid_ns->reboot = SIGINT;
break;
default:
return -EINVAL;
}
read_lock(&tasklist_lock);
force_sig(SIGKILL, pid_ns->child_reaper);
read_unlock(&tasklist_lock);
do_exit(0);
/* Not reached */
return 0;
}
static __init int pid_namespaces_init(void)
{
pid_ns_cachep = KMEM_CACHE(pid_namespace, SLAB_PANIC);
kernel/power/hibernate.c
+2 -16
View File
@@ -16,7 +16,6 @@
#include <linux/string.h>
#include <linux/device.h>
#include <linux/async.h>
#include <linux/kmod.h>
#include <linux/delay.h>
#include <linux/fs.h>
#include <linux/mount.h>
@@ -611,14 +610,10 @@ int hibernate(void)
if (error)
goto Exit;
error = usermodehelper_disable();
if (error)
goto Exit;
/* Allocate memory management structures */
error = create_basic_memory_bitmaps();
if (error)
goto Enable_umh;
goto Exit;
printk(KERN_INFO "PM: Syncing filesystems ... ");
sys_sync();
@@ -661,8 +656,6 @@ int hibernate(void)
Free_bitmaps:
free_basic_memory_bitmaps();
Enable_umh:
usermodehelper_enable();
Exit:
pm_notifier_call_chain(PM_POST_HIBERNATION);
pm_restore_console();
@@ -777,16 +770,10 @@ static int software_resume(void)
if (error)
goto close_finish;
error = usermodehelper_disable();
error = create_basic_memory_bitmaps();
if (error)
goto close_finish;
error = create_basic_memory_bitmaps();
if (error) {
usermodehelper_enable();
goto close_finish;
}
pr_debug("PM: Preparing processes for restore.\n");
error = freeze_processes();
if (error) {
@@ -806,7 +793,6 @@ static int software_resume(void)
thaw_processes();
Done:
free_basic_memory_bitmaps();
usermodehelper_enable();
Finish:
pm_notifier_call_chain(PM_POST_RESTORE);
pm_restore_console();
kernel/power/process.c
+8
View File
@@ -16,6 +16,7 @@
#include <linux/freezer.h>
#include <linux/delay.h>
#include <linux/workqueue.h>
#include <linux/kmod.h>
/*
* Timeout for stopping processes
@@ -122,6 +123,10 @@ int freeze_processes(void)
{
int error;
error = __usermodehelper_disable(UMH_FREEZING);
if (error)
return error;
if (!pm_freezing)
atomic_inc(&system_freezing_cnt);
@@ -130,6 +135,7 @@ int freeze_processes(void)
error = try_to_freeze_tasks(true);
if (!error) {
printk("done.");
__usermodehelper_set_disable_depth(UMH_DISABLED);
oom_killer_disable();
}
printk("\n");
@@ -187,6 +193,8 @@ void thaw_processes(void)
} while_each_thread(g, p);
read_unlock(&tasklist_lock);
usermodehelper_enable();
schedule();
printk("done.\n");
}
kernel/power/qos.c
+50
View File
@@ -229,6 +229,21 @@ int pm_qos_request_active(struct pm_qos_request *req)
}
EXPORT_SYMBOL_GPL(pm_qos_request_active);
/**
* pm_qos_work_fn - the timeout handler of pm_qos_update_request_timeout
* @work: work struct for the delayed work (timeout)
*
* This cancels the timeout request by falling back to the default at timeout.
*/
static void pm_qos_work_fn(struct work_struct *work)
{
struct pm_qos_request *req = container_of(to_delayed_work(work),
struct pm_qos_request,
work);
pm_qos_update_request(req, PM_QOS_DEFAULT_VALUE);
}
/**
* pm_qos_add_request - inserts new qos request into the list
* @req: pointer to a preallocated handle
@@ -253,6 +268,7 @@ void pm_qos_add_request(struct pm_qos_request *req,
return;
}
req->pm_qos_class = pm_qos_class;
INIT_DELAYED_WORK(&req->work, pm_qos_work_fn);
pm_qos_update_target(pm_qos_array[pm_qos_class]->constraints,
&req->node, PM_QOS_ADD_REQ, value);
}
@@ -279,6 +295,9 @@ void pm_qos_update_request(struct pm_qos_request *req,
return;
}
if (delayed_work_pending(&req->work))
cancel_delayed_work_sync(&req->work);
if (new_value != req->node.prio)
pm_qos_update_target(
pm_qos_array[req->pm_qos_class]->constraints,
@@ -286,6 +305,34 @@ void pm_qos_update_request(struct pm_qos_request *req,
}
EXPORT_SYMBOL_GPL(pm_qos_update_request);
/**
* pm_qos_update_request_timeout - modifies an existing qos request temporarily.
* @req : handle to list element holding a pm_qos request to use
* @new_value: defines the temporal qos request
* @timeout_us: the effective duration of this qos request in usecs.
*
* After timeout_us, this qos request is cancelled automatically.
*/
void pm_qos_update_request_timeout(struct pm_qos_request *req, s32 new_value,
unsigned long timeout_us)
{
if (!req)
return;
if (WARN(!pm_qos_request_active(req),
"%s called for unknown object.", __func__))
return;
if (delayed_work_pending(&req->work))
cancel_delayed_work_sync(&req->work);
if (new_value != req->node.prio)
pm_qos_update_target(
pm_qos_array[req->pm_qos_class]->constraints,
&req->node, PM_QOS_UPDATE_REQ, new_value);
schedule_delayed_work(&req->work, usecs_to_jiffies(timeout_us));
}
/**
* pm_qos_remove_request - modifies an existing qos request
* @req: handle to request list element
@@ -305,6 +352,9 @@ void pm_qos_remove_request(struct pm_qos_request *req)
return;
}
if (delayed_work_pending(&req->work))
cancel_delayed_work_sync(&req->work);
pm_qos_update_target(pm_qos_array[req->pm_qos_class]->constraints,
&req->node, PM_QOS_REMOVE_REQ,
PM_QOS_DEFAULT_VALUE);
kernel/power/suspend.c
-7
View File
@@ -12,7 +12,6 @@
#include <linux/delay.h>
#include <linux/errno.h>
#include <linux/init.h>
#include <linux/kmod.h>
#include <linux/console.h>
#include <linux/cpu.h>
#include <linux/syscalls.h>
@@ -102,17 +101,12 @@ static int suspend_prepare(void)
if (error)
goto Finish;
error = usermodehelper_disable();
if (error)
goto Finish;
error = suspend_freeze_processes();
if (!error)
return 0;
suspend_stats.failed_freeze++;
dpm_save_failed_step(SUSPEND_FREEZE);
usermodehelper_enable();
Finish:
pm_notifier_call_chain(PM_POST_SUSPEND);
pm_restore_console();
@@ -259,7 +253,6 @@ int suspend_devices_and_enter(suspend_state_t state)
static void suspend_finish(void)
{
suspend_thaw_processes();
usermodehelper_enable();
pm_notifier_call_chain(PM_POST_SUSPEND);
pm_restore_console();
}
kernel/power/user.c
+1 -9
View File
@@ -12,7 +12,6 @@
#include <linux/suspend.h>
#include <linux/syscalls.h>
#include <linux/reboot.h>
#include <linux/kmod.h>
#include <linux/string.h>
#include <linux/device.h>
#include <linux/miscdevice.h>
@@ -222,14 +221,8 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd,
sys_sync();
printk("done.\n");
error = usermodehelper_disable();
if (error)
break;
error = freeze_processes();
if (error)
usermodehelper_enable();
else
if (!error)
data->frozen = 1;
break;
@@ -238,7 +231,6 @@ static long snapshot_ioctl(struct file *filp, unsigned int cmd,
break;
pm_restore_gfp_mask();
thaw_processes();
usermodehelper_enable();
data->frozen = 0;
break;
kernel/ptrace.c
+25 -41
View File
@@ -231,26 +231,22 @@ bool ptrace_may_access(struct task_struct *task, unsigned int mode)
}
static int ptrace_attach(struct task_struct *task, long request,
unsigned long addr,
unsigned long flags)
{
bool seize = (request == PTRACE_SEIZE);
int retval;
/*
* SEIZE will enable new ptrace behaviors which will be implemented
* gradually. SEIZE_DEVEL is used to prevent applications
* expecting full SEIZE behaviors trapping on kernel commits which
* are still in the process of implementing them.
*
* Only test programs for new ptrace behaviors being implemented
* should set SEIZE_DEVEL. If unset, SEIZE will fail with -EIO.
*
* Once SEIZE behaviors are completely implemented, this flag and
* the following test will be removed.
*/
retval = -EIO;
if (seize && !(flags & PTRACE_SEIZE_DEVEL))
goto out;
if (seize) {
if (addr != 0)
goto out;
if (flags & ~(unsigned long)PTRACE_O_MASK)
goto out;
flags = PT_PTRACED | PT_SEIZED | (flags << PT_OPT_FLAG_SHIFT);
} else {
flags = PT_PTRACED;
}
audit_ptrace(task);
@@ -262,7 +258,7 @@ static int ptrace_attach(struct task_struct *task, long request,
/*
* Protect exec's credential calculations against our interference;
* interference; SUID, SGID and LSM creds get determined differently
* SUID, SGID and LSM creds get determined differently
* under ptrace.
*/
retval = -ERESTARTNOINTR;
@@ -282,11 +278,11 @@ static int ptrace_attach(struct task_struct *task, long request,
if (task->ptrace)
goto unlock_tasklist;
task->ptrace = PT_PTRACED;
if (seize)
task->ptrace |= PT_SEIZED;
flags |= PT_SEIZED;
if (ns_capable(task_user_ns(task), CAP_SYS_PTRACE))
task->ptrace |= PT_PTRACE_CAP;
flags |= PT_PTRACE_CAP;
task->ptrace = flags;
__ptrace_link(task, current);
@@ -528,30 +524,18 @@ int ptrace_writedata(struct task_struct *tsk, char __user *src, unsigned long ds
static int ptrace_setoptions(struct task_struct *child, unsigned long data)
{
child->ptrace &= ~PT_TRACE_MASK;
unsigned flags;
if (data & PTRACE_O_TRACESYSGOOD)
child->ptrace |= PT_TRACESYSGOOD;
if (data & ~(unsigned long)PTRACE_O_MASK)
return -EINVAL;
if (data & PTRACE_O_TRACEFORK)
child->ptrace |= PT_TRACE_FORK;
/* Avoid intermediate state when all opts are cleared */
flags = child->ptrace;
flags &= ~(PTRACE_O_MASK << PT_OPT_FLAG_SHIFT);
flags |= (data << PT_OPT_FLAG_SHIFT);
child->ptrace = flags;
if (data & PTRACE_O_TRACEVFORK)
child->ptrace |= PT_TRACE_VFORK;
if (data & PTRACE_O_TRACECLONE)
child->ptrace |= PT_TRACE_CLONE;
if (data & PTRACE_O_TRACEEXEC)
child->ptrace |= PT_TRACE_EXEC;
if (data & PTRACE_O_TRACEVFORKDONE)
child->ptrace |= PT_TRACE_VFORK_DONE;
if (data & PTRACE_O_TRACEEXIT)
child->ptrace |= PT_TRACE_EXIT;
return (data & ~PTRACE_O_MASK) ? -EINVAL : 0;
return 0;
}
static int ptrace_getsiginfo(struct task_struct *child, siginfo_t *info)
@@ -891,7 +875,7 @@ SYSCALL_DEFINE4(ptrace, long, request, long, pid, unsigned long, addr,
}
if (request == PTRACE_ATTACH || request == PTRACE_SEIZE) {
ret = ptrace_attach(child, request, data);
ret = ptrace_attach(child, request, addr, data);
/*
* Some architectures need to do book-keeping after
* a ptrace attach.
@@ -1034,7 +1018,7 @@ asmlinkage long compat_sys_ptrace(compat_long_t request, compat_long_t pid,
}
if (request == PTRACE_ATTACH || request == PTRACE_SEIZE) {
ret = ptrace_attach(child, request, data);
ret = ptrace_attach(child, request, addr, data);
/*
* Some architectures need to do book-keeping after
* a ptrace attach.
kernel/rwsem.c
-1
View File
@@ -10,7 +10,6 @@
#include <linux/export.h>
#include <linux/rwsem.h>
#include <asm/system.h>
#include <linux/atomic.h>
/*
kernel/sched/core.c
+49 -23
View File
@@ -73,6 +73,7 @@
#include <linux/init_task.h>
#include <linux/binfmts.h>
#include <asm/switch_to.h>
#include <asm/tlb.h>
#include <asm/irq_regs.h>
#include <asm/mutex.h>
@@ -1264,29 +1265,59 @@ EXPORT_SYMBOL_GPL(kick_process);
*/
static int select_fallback_rq(int cpu, struct task_struct *p)
{
int dest_cpu;
const struct cpumask *nodemask = cpumask_of_node(cpu_to_node(cpu));
enum { cpuset, possible, fail } state = cpuset;
int dest_cpu;
/* Look for allowed, online CPU in same node. */
for_each_cpu_and(dest_cpu, nodemask, cpu_active_mask)
for_each_cpu(dest_cpu, nodemask) {
if (!cpu_online(dest_cpu))
continue;
if (!cpu_active(dest_cpu))
continue;
if (cpumask_test_cpu(dest_cpu, tsk_cpus_allowed(p)))
return dest_cpu;
}
/* Any allowed, online CPU? */
dest_cpu = cpumask_any_and(tsk_cpus_allowed(p), cpu_active_mask);
if (dest_cpu < nr_cpu_ids)
return dest_cpu;
for (;;) {
/* Any allowed, online CPU? */
for_each_cpu(dest_cpu, tsk_cpus_allowed(p)) {
if (!cpu_online(dest_cpu))
continue;
if (!cpu_active(dest_cpu))
continue;
goto out;
}
/* No more Mr. Nice Guy. */
dest_cpu = cpuset_cpus_allowed_fallback(p);
/*
* Don't tell them about moving exiting tasks or
* kernel threads (both mm NULL), since they never
* leave kernel.
*/
if (p->mm && printk_ratelimit()) {
printk_sched("process %d (%s) no longer affine to cpu%d\n",
task_pid_nr(p), p->comm, cpu);
switch (state) {
case cpuset:
/* No more Mr. Nice Guy. */
cpuset_cpus_allowed_fallback(p);
state = possible;
break;
case possible:
do_set_cpus_allowed(p, cpu_possible_mask);
state = fail;
break;
case fail:
BUG();
break;
}
}
out:
if (state != cpuset) {
/*
* Don't tell them about moving exiting tasks or
* kernel threads (both mm NULL), since they never
* leave kernel.
*/
if (p->mm && printk_ratelimit()) {
printk_sched("process %d (%s) no longer affine to cpu%d\n",
task_pid_nr(p), p->comm, cpu);
}
}
return dest_cpu;
@@ -1933,6 +1964,7 @@ static void finish_task_switch(struct rq *rq, struct task_struct *prev)
local_irq_enable();
#endif /* __ARCH_WANT_INTERRUPTS_ON_CTXSW */
finish_lock_switch(rq, prev);
finish_arch_post_lock_switch();
fire_sched_in_preempt_notifiers(current);
if (mm)
@@ -3070,8 +3102,6 @@ EXPORT_SYMBOL(sub_preempt_count);
*/
static noinline void __schedule_bug(struct task_struct *prev)
{
struct pt_regs *regs = get_irq_regs();
if (oops_in_progress)
return;
@@ -3082,11 +3112,7 @@ static noinline void __schedule_bug(struct task_struct *prev)
print_modules();
if (irqs_disabled())
print_irqtrace_events(prev);
if (regs)
show_regs(regs);
else
dump_stack();
dump_stack();
}
/*
kernel/sched/fair.c
+8 -8
View File
@@ -416,8 +416,8 @@ find_matching_se(struct sched_entity **se, struct sched_entity **pse)
#endif /* CONFIG_FAIR_GROUP_SCHED */
static void account_cfs_rq_runtime(struct cfs_rq *cfs_rq,
unsigned long delta_exec);
static __always_inline
void account_cfs_rq_runtime(struct cfs_rq *cfs_rq, unsigned long delta_exec);
/**************************************************************
* Scheduling class tree data structure manipulation methods:
@@ -1162,7 +1162,7 @@ static void clear_buddies(struct cfs_rq *cfs_rq, struct sched_entity *se)
__clear_buddies_skip(se);
}
static void return_cfs_rq_runtime(struct cfs_rq *cfs_rq);
static __always_inline void return_cfs_rq_runtime(struct cfs_rq *cfs_rq);
static void
dequeue_entity(struct cfs_rq *cfs_rq, struct sched_entity *se, int flags)
@@ -1546,8 +1546,8 @@ static void __account_cfs_rq_runtime(struct cfs_rq *cfs_rq,
resched_task(rq_of(cfs_rq)->curr);
}
static __always_inline void account_cfs_rq_runtime(struct cfs_rq *cfs_rq,
unsigned long delta_exec)
static __always_inline
void account_cfs_rq_runtime(struct cfs_rq *cfs_rq, unsigned long delta_exec)
{
if (!cfs_bandwidth_used() || !cfs_rq->runtime_enabled)
return;
@@ -2073,11 +2073,11 @@ void unthrottle_offline_cfs_rqs(struct rq *rq)
}
#else /* CONFIG_CFS_BANDWIDTH */
static void account_cfs_rq_runtime(struct cfs_rq *cfs_rq,
unsigned long delta_exec) {}
static __always_inline
void account_cfs_rq_runtime(struct cfs_rq *cfs_rq, unsigned long delta_exec) {}
static void check_cfs_rq_runtime(struct cfs_rq *cfs_rq) {}
static void check_enqueue_throttle(struct cfs_rq *cfs_rq) {}
static void return_cfs_rq_runtime(struct cfs_rq *cfs_rq) {}
static __always_inline void return_cfs_rq_runtime(struct cfs_rq *cfs_rq) {}
static inline int cfs_rq_throttled(struct cfs_rq *cfs_rq)
{
kernel/sched/rt.c
+1 -1
View File
@@ -1428,7 +1428,7 @@ static struct task_struct *pick_next_highest_task_rt(struct rq *rq, int cpu)
next_idx:
if (idx >= MAX_RT_PRIO)
continue;
if (next && next->prio < idx)
if (next && next->prio <= idx)
continue;
list_for_each_entry(rt_se, array->queue + idx, run_list) {
struct task_struct *p;
kernel/sched/sched.h
+3
View File
@@ -681,6 +681,9 @@ static inline int task_running(struct rq *rq, struct task_struct *p)
#ifndef finish_arch_switch
# define finish_arch_switch(prev) do { } while (0)
#endif
#ifndef finish_arch_post_lock_switch
# define finish_arch_post_lock_switch() do { } while (0)
#endif
#ifndef __ARCH_WANT_UNLOCKED_CTXSW
static inline void prepare_lock_switch(struct rq *rq, struct task_struct *next)
kernel/signal.c
+10 -9
View File
@@ -36,6 +36,7 @@
#include <asm/uaccess.h>
#include <asm/unistd.h>
#include <asm/siginfo.h>
#include <asm/cacheflush.h>
#include "audit.h" /* audit_signal_info() */
/*
@@ -58,21 +59,20 @@ static int sig_handler_ignored(void __user *handler, int sig)
(handler == SIG_DFL && sig_kernel_ignore(sig));
}
static int sig_task_ignored(struct task_struct *t, int sig,
int from_ancestor_ns)
static int sig_task_ignored(struct task_struct *t, int sig, bool force)
{
void __user *handler;
handler = sig_handler(t, sig);
if (unlikely(t->signal->flags & SIGNAL_UNKILLABLE) &&
handler == SIG_DFL && !from_ancestor_ns)
handler == SIG_DFL && !force)
return 1;
return sig_handler_ignored(handler, sig);
}
static int sig_ignored(struct task_struct *t, int sig, int from_ancestor_ns)
static int sig_ignored(struct task_struct *t, int sig, bool force)
{
/*
* Blocked signals are never ignored, since the
@@ -82,7 +82,7 @@ static int sig_ignored(struct task_struct *t, int sig, int from_ancestor_ns)
if (sigismember(&t->blocked, sig) || sigismember(&t->real_blocked, sig))
return 0;
if (!sig_task_ignored(t, sig, from_ancestor_ns))
if (!sig_task_ignored(t, sig, force))
return 0;
/*
@@ -855,7 +855,7 @@ static void ptrace_trap_notify(struct task_struct *t)
* Returns true if the signal should be actually delivered, otherwise
* it should be dropped.
*/
static int prepare_signal(int sig, struct task_struct *p, int from_ancestor_ns)
static int prepare_signal(int sig, struct task_struct *p, bool force)
{
struct signal_struct *signal = p->signal;
struct task_struct *t;
@@ -915,7 +915,7 @@ static int prepare_signal(int sig, struct task_struct *p, int from_ancestor_ns)
}
}
return !sig_ignored(p, sig, from_ancestor_ns);
return !sig_ignored(p, sig, force);
}
/*
@@ -1059,7 +1059,8 @@ static int __send_signal(int sig, struct siginfo *info, struct task_struct *t,
assert_spin_locked(&t->sighand->siglock);
result = TRACE_SIGNAL_IGNORED;
if (!prepare_signal(sig, t, from_ancestor_ns))
if (!prepare_signal(sig, t,
from_ancestor_ns || (info == SEND_SIG_FORCED)))
goto ret;
pending = group ? &t->signal->shared_pending : &t->pending;
@@ -1601,7 +1602,7 @@ int send_sigqueue(struct sigqueue *q, struct task_struct *t, int group)
ret = 1; /* the signal is ignored */
result = TRACE_SIGNAL_IGNORED;
if (!prepare_signal(sig, t, 0))
if (!prepare_signal(sig, t, false))
goto out;
ret = 0;
kernel/smp.c
+90
View File
@@ -701,3 +701,93 @@ int on_each_cpu(void (*func) (void *info), void *info, int wait)
return ret;
}
EXPORT_SYMBOL(on_each_cpu);
/**
* on_each_cpu_mask(): Run a function on processors specified by
* cpumask, which may include the local processor.
* @mask: The set of cpus to run on (only runs on online subset).
* @func: The function to run. This must be fast and non-blocking.
* @info: An arbitrary pointer to pass to the function.
* @wait: If true, wait (atomically) until function has completed
* on other CPUs.
*
* If @wait is true, then returns once @func has returned.
*
* You must not call this function with disabled interrupts or
* from a hardware interrupt handler or from a bottom half handler.
*/
void on_each_cpu_mask(const struct cpumask *mask, smp_call_func_t func,
void *info, bool wait)
{
int cpu = get_cpu();
smp_call_function_many(mask, func, info, wait);
if (cpumask_test_cpu(cpu, mask)) {
local_irq_disable();
func(info);
local_irq_enable();
}
put_cpu();
}
EXPORT_SYMBOL(on_each_cpu_mask);
/*
* on_each_cpu_cond(): Call a function on each processor for which
* the supplied function cond_func returns true, optionally waiting
* for all the required CPUs to finish. This may include the local
* processor.
* @cond_func: A callback function that is passed a cpu id and
* the the info parameter. The function is called
* with preemption disabled. The function should
* return a blooean value indicating whether to IPI
* the specified CPU.
* @func: The function to run on all applicable CPUs.
* This must be fast and non-blocking.
* @info: An arbitrary pointer to pass to both functions.
* @wait: If true, wait (atomically) until function has
* completed on other CPUs.
* @gfp_flags: GFP flags to use when allocating the cpumask
* used internally by the function.
*
* The function might sleep if the GFP flags indicates a non
* atomic allocation is allowed.
*
* Preemption is disabled to protect against CPUs going offline but not online.
* CPUs going online during the call will not be seen or sent an IPI.
*
* You must not call this function with disabled interrupts or
* from a hardware interrupt handler or from a bottom half handler.
*/
void on_each_cpu_cond(bool (*cond_func)(int cpu, void *info),
smp_call_func_t func, void *info, bool wait,
gfp_t gfp_flags)
{
cpumask_var_t cpus;
int cpu, ret;
might_sleep_if(gfp_flags & __GFP_WAIT);
if (likely(zalloc_cpumask_var(&cpus, (gfp_flags|__GFP_NOWARN)))) {
preempt_disable();
for_each_online_cpu(cpu)
if (cond_func(cpu, info))
cpumask_set_cpu(cpu, cpus);
on_each_cpu_mask(cpus, func, info, wait);
preempt_enable();
free_cpumask_var(cpus);
} else {
/*
* No free cpumask, bother. No matter, we'll
* just have to IPI them one by one.
*/
preempt_disable();
for_each_online_cpu(cpu)
if (cond_func(cpu, info)) {
ret = smp_call_function_single(cpu, func,
info, wait);
WARN_ON_ONCE(!ret);
}
preempt_enable();
}
}
EXPORT_SYMBOL(on_each_cpu_cond);
kernel/spinlock.c
+1 -1
View File
@@ -163,7 +163,7 @@ void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock)
EXPORT_SYMBOL(_raw_spin_lock_bh);
#endif
#ifndef CONFIG_INLINE_SPIN_UNLOCK
#ifdef CONFIG_UNINLINE_SPIN_UNLOCK
void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock)
{
__raw_spin_unlock(lock);
kernel/sys.c
+9
View File
@@ -444,6 +444,15 @@ SYSCALL_DEFINE4(reboot, int, magic1, int, magic2, unsigned int, cmd,
magic2 != LINUX_REBOOT_MAGIC2C))
return -EINVAL;
/*
* If pid namespaces are enabled and the current task is in a child
* pid_namespace, the command is handled by reboot_pid_ns() which will
* call do_exit().
*/
ret = reboot_pid_ns(task_active_pid_ns(current), cmd);
if (ret)
return ret;
/* Instead of trying to make the power_off code look like
* halt when pm_power_off is not set do it the easy way.
*/
kernel/sysctl.c
+13 -508
View File
@@ -23,6 +23,7 @@
#include <linux/swap.h>
#include <linux/slab.h>
#include <linux/sysctl.h>
#include <linux/bitmap.h>
#include <linux/signal.h>
#include <linux/printk.h>
#include <linux/proc_fs.h>
@@ -68,6 +69,9 @@
#include <asm/stacktrace.h>
#include <asm/io.h>
#endif
#ifdef CONFIG_SPARC
#include <asm/setup.h>
#endif
#ifdef CONFIG_BSD_PROCESS_ACCT
#include <linux/acct.h>
#endif
@@ -142,7 +146,6 @@ static const int cap_last_cap = CAP_LAST_CAP;
#include <linux/inotify.h>
#endif
#ifdef CONFIG_SPARC
#include <asm/system.h>
#endif
#ifdef CONFIG_SPARC64
@@ -167,7 +170,7 @@ static int proc_taint(struct ctl_table *table, int write,
#endif
#ifdef CONFIG_PRINTK
static int proc_dmesg_restrict(struct ctl_table *table, int write,
static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos);
#endif
@@ -193,20 +196,6 @@ static int sysrq_sysctl_handler(ctl_table *table, int write,
#endif
static struct ctl_table root_table[];
static struct ctl_table_root sysctl_table_root;
static struct ctl_table_header root_table_header = {
{{.count = 1,
.ctl_table = root_table,
.ctl_entry = LIST_HEAD_INIT(sysctl_table_root.default_set.list),}},
.root = &sysctl_table_root,
.set = &sysctl_table_root.default_set,
};
static struct ctl_table_root sysctl_table_root = {
.root_list = LIST_HEAD_INIT(sysctl_table_root.root_list),
.default_set.list = LIST_HEAD_INIT(root_table_header.ctl_entry),
};
static struct ctl_table kern_table[];
static struct ctl_table vm_table[];
static struct ctl_table fs_table[];
@@ -223,7 +212,7 @@ int sysctl_legacy_va_layout;
/* The default sysctl tables: */
static struct ctl_table root_table[] = {
static struct ctl_table sysctl_base_table[] = {
{
.procname = "kernel",
.mode = 0555,
@@ -714,7 +703,7 @@ static struct ctl_table kern_table[] = {
.data = &dmesg_restrict,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dointvec_minmax,
.proc_handler = proc_dointvec_minmax_sysadmin,
.extra1 = &zero,
.extra2 = &one,
},
@@ -723,7 +712,7 @@ static struct ctl_table kern_table[] = {
.data = &kptr_restrict,
.maxlen = sizeof(int),
.mode = 0644,
.proc_handler = proc_dmesg_restrict,
.proc_handler = proc_dointvec_minmax_sysadmin,
.extra1 = &zero,
.extra2 = &two,
},
@@ -1560,490 +1549,12 @@ static struct ctl_table dev_table[] = {
{ }
};
static DEFINE_SPINLOCK(sysctl_lock);
/* called under sysctl_lock */
static int use_table(struct ctl_table_header *p)
int __init sysctl_init(void)
{
if (unlikely(p->unregistering))
return 0;
p->used++;
return 1;
}
/* called under sysctl_lock */
static void unuse_table(struct ctl_table_header *p)
{
if (!--p->used)
if (unlikely(p->unregistering))
complete(p->unregistering);
}
/* called under sysctl_lock, will reacquire if has to wait */
static void start_unregistering(struct ctl_table_header *p)
{
/*
* if p->used is 0, nobody will ever touch that entry again;
* we'll eliminate all paths to it before dropping sysctl_lock
*/
if (unlikely(p->used)) {
struct completion wait;
init_completion(&wait);
p->unregistering = &wait;
spin_unlock(&sysctl_lock);
wait_for_completion(&wait);
spin_lock(&sysctl_lock);
} else {
/* anything non-NULL; we'll never dereference it */
p->unregistering = ERR_PTR(-EINVAL);
}
/*
* do not remove from the list until nobody holds it; walking the
* list in do_sysctl() relies on that.
*/
list_del_init(&p->ctl_entry);
}
void sysctl_head_get(struct ctl_table_header *head)
{
spin_lock(&sysctl_lock);
head->count++;
spin_unlock(&sysctl_lock);
}
void sysctl_head_put(struct ctl_table_header *head)
{
spin_lock(&sysctl_lock);
if (!--head->count)
kfree_rcu(head, rcu);
spin_unlock(&sysctl_lock);
}
struct ctl_table_header *sysctl_head_grab(struct ctl_table_header *head)
{
if (!head)
BUG();
spin_lock(&sysctl_lock);
if (!use_table(head))
head = ERR_PTR(-ENOENT);
spin_unlock(&sysctl_lock);
return head;
}
void sysctl_head_finish(struct ctl_table_header *head)
{
if (!head)
return;
spin_lock(&sysctl_lock);
unuse_table(head);
spin_unlock(&sysctl_lock);
}
static struct ctl_table_set *
lookup_header_set(struct ctl_table_root *root, struct nsproxy *namespaces)
{
struct ctl_table_set *set = &root->default_set;
if (root->lookup)
set = root->lookup(root, namespaces);
return set;
}
static struct list_head *
lookup_header_list(struct ctl_table_root *root, struct nsproxy *namespaces)
{
struct ctl_table_set *set = lookup_header_set(root, namespaces);
return &set->list;
}
struct ctl_table_header *__sysctl_head_next(struct nsproxy *namespaces,
struct ctl_table_header *prev)
{
struct ctl_table_root *root;
struct list_head *header_list;
struct ctl_table_header *head;
struct list_head *tmp;
spin_lock(&sysctl_lock);
if (prev) {
head = prev;
tmp = &prev->ctl_entry;
unuse_table(prev);
goto next;
}
tmp = &root_table_header.ctl_entry;
for (;;) {
head = list_entry(tmp, struct ctl_table_header, ctl_entry);
if (!use_table(head))
goto next;
spin_unlock(&sysctl_lock);
return head;
next:
root = head->root;
tmp = tmp->next;
header_list = lookup_header_list(root, namespaces);
if (tmp != header_list)
continue;
do {
root = list_entry(root->root_list.next,
struct ctl_table_root, root_list);
if (root == &sysctl_table_root)
goto out;
header_list = lookup_header_list(root, namespaces);
} while (list_empty(header_list));
tmp = header_list->next;
}
out:
spin_unlock(&sysctl_lock);
return NULL;
}
struct ctl_table_header *sysctl_head_next(struct ctl_table_header *prev)
{
return __sysctl_head_next(current->nsproxy, prev);
}
void register_sysctl_root(struct ctl_table_root *root)
{
spin_lock(&sysctl_lock);
list_add_tail(&root->root_list, &sysctl_table_root.root_list);
spin_unlock(&sysctl_lock);
}
/*
* sysctl_perm does NOT grant the superuser all rights automatically, because
* some sysctl variables are readonly even to root.
*/
static int test_perm(int mode, int op)
{
if (!current_euid())
mode >>= 6;
else if (in_egroup_p(0))
mode >>= 3;
if ((op & ~mode & (MAY_READ|MAY_WRITE|MAY_EXEC)) == 0)
return 0;
return -EACCES;
}
int sysctl_perm(struct ctl_table_root *root, struct ctl_table *table, int op)
{
int mode;
if (root->permissions)
mode = root->permissions(root, current->nsproxy, table);
else
mode = table->mode;
return test_perm(mode, op);
}
static void sysctl_set_parent(struct ctl_table *parent, struct ctl_table *table)
{
for (; table->procname; table++) {
table->parent = parent;
if (table->child)
sysctl_set_parent(table, table->child);
}
}
static __init int sysctl_init(void)
{
sysctl_set_parent(NULL, root_table);
#ifdef CONFIG_SYSCTL_SYSCALL_CHECK
sysctl_check_table(current->nsproxy, root_table);
#endif
register_sysctl_table(sysctl_base_table);
return 0;
}
core_initcall(sysctl_init);
static struct ctl_table *is_branch_in(struct ctl_table *branch,
struct ctl_table *table)
{
struct ctl_table *p;
const char *s = branch->procname;
/* branch should have named subdirectory as its first element */
if (!s || !branch->child)
return NULL;
/* ... and nothing else */
if (branch[1].procname)
return NULL;
/* table should contain subdirectory with the same name */
for (p = table; p->procname; p++) {
if (!p->child)
continue;
if (p->procname && strcmp(p->procname, s) == 0)
return p;
}
return NULL;
}
/* see if attaching q to p would be an improvement */
static void try_attach(struct ctl_table_header *p, struct ctl_table_header *q)
{
struct ctl_table *to = p->ctl_table, *by = q->ctl_table;
struct ctl_table *next;
int is_better = 0;
int not_in_parent = !p->attached_by;
while ((next = is_branch_in(by, to)) != NULL) {
if (by == q->attached_by)
is_better = 1;
if (to == p->attached_by)
not_in_parent = 1;
by = by->child;
to = next->child;
}
if (is_better && not_in_parent) {
q->attached_by = by;
q->attached_to = to;
q->parent = p;
}
}
/**
* __register_sysctl_paths - register a sysctl hierarchy
* @root: List of sysctl headers to register on
* @namespaces: Data to compute which lists of sysctl entries are visible
* @path: The path to the directory the sysctl table is in.
* @table: the top-level table structure
*
* Register a sysctl table hierarchy. @table should be a filled in ctl_table
* array. A completely 0 filled entry terminates the table.
*
* The members of the &struct ctl_table structure are used as follows:
*
* procname - the name of the sysctl file under /proc/sys. Set to %NULL to not
* enter a sysctl file
*
* data - a pointer to data for use by proc_handler
*
* maxlen - the maximum size in bytes of the data
*
* mode - the file permissions for the /proc/sys file, and for sysctl(2)
*
* child - a pointer to the child sysctl table if this entry is a directory, or
* %NULL.
*
* proc_handler - the text handler routine (described below)
*
* de - for internal use by the sysctl routines
*
* extra1, extra2 - extra pointers usable by the proc handler routines
*
* Leaf nodes in the sysctl tree will be represented by a single file
* under /proc; non-leaf nodes will be represented by directories.
*
* sysctl(2) can automatically manage read and write requests through
* the sysctl table. The data and maxlen fields of the ctl_table
* struct enable minimal validation of the values being written to be
* performed, and the mode field allows minimal authentication.
*
* There must be a proc_handler routine for any terminal nodes
* mirrored under /proc/sys (non-terminals are handled by a built-in
* directory handler). Several default handlers are available to
* cover common cases -
*
* proc_dostring(), proc_dointvec(), proc_dointvec_jiffies(),
* proc_dointvec_userhz_jiffies(), proc_dointvec_minmax(),
* proc_doulongvec_ms_jiffies_minmax(), proc_doulongvec_minmax()
*
* It is the handler's job to read the input buffer from user memory
* and process it. The handler should return 0 on success.
*
* This routine returns %NULL on a failure to register, and a pointer
* to the table header on success.
*/
struct ctl_table_header *__register_sysctl_paths(
struct ctl_table_root *root,
struct nsproxy *namespaces,
const struct ctl_path *path, struct ctl_table *table)
{
struct ctl_table_header *header;
struct ctl_table *new, **prevp;
unsigned int n, npath;
struct ctl_table_set *set;
/* Count the path components */
for (npath = 0; path[npath].procname; ++npath)
;
/*
* For each path component, allocate a 2-element ctl_table array.
* The first array element will be filled with the sysctl entry
* for this, the second will be the sentinel (procname == 0).
*
* We allocate everything in one go so that we don't have to
* worry about freeing additional memory in unregister_sysctl_table.
*/
header = kzalloc(sizeof(struct ctl_table_header) +
(2 * npath * sizeof(struct ctl_table)), GFP_KERNEL);
if (!header)
return NULL;
new = (struct ctl_table *) (header + 1);
/* Now connect the dots */
prevp = &header->ctl_table;
for (n = 0; n < npath; ++n, ++path) {
/* Copy the procname */
new->procname = path->procname;
new->mode = 0555;
*prevp = new;
prevp = &new->child;
new += 2;
}
*prevp = table;
header->ctl_table_arg = table;
INIT_LIST_HEAD(&header->ctl_entry);
header->used = 0;
header->unregistering = NULL;
header->root = root;
sysctl_set_parent(NULL, header->ctl_table);
header->count = 1;
#ifdef CONFIG_SYSCTL_SYSCALL_CHECK
if (sysctl_check_table(namespaces, header->ctl_table)) {
kfree(header);
return NULL;
}
#endif
spin_lock(&sysctl_lock);
header->set = lookup_header_set(root, namespaces);
header->attached_by = header->ctl_table;
header->attached_to = root_table;
header->parent = &root_table_header;
for (set = header->set; set; set = set->parent) {
struct ctl_table_header *p;
list_for_each_entry(p, &set->list, ctl_entry) {
if (p->unregistering)
continue;
try_attach(p, header);
}
}
header->parent->count++;
list_add_tail(&header->ctl_entry, &header->set->list);
spin_unlock(&sysctl_lock);
return header;
}
/**
* register_sysctl_table_path - register a sysctl table hierarchy
* @path: The path to the directory the sysctl table is in.
* @table: the top-level table structure
*
* Register a sysctl table hierarchy. @table should be a filled in ctl_table
* array. A completely 0 filled entry terminates the table.
*
* See __register_sysctl_paths for more details.
*/
struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
struct ctl_table *table)
{
return __register_sysctl_paths(&sysctl_table_root, current->nsproxy,
path, table);
}
/**
* register_sysctl_table - register a sysctl table hierarchy
* @table: the top-level table structure
*
* Register a sysctl table hierarchy. @table should be a filled in ctl_table
* array. A completely 0 filled entry terminates the table.
*
* See register_sysctl_paths for more details.
*/
struct ctl_table_header *register_sysctl_table(struct ctl_table *table)
{
static const struct ctl_path null_path[] = { {} };
return register_sysctl_paths(null_path, table);
}
/**
* unregister_sysctl_table - unregister a sysctl table hierarchy
* @header: the header returned from register_sysctl_table
*
* Unregisters the sysctl table and all children. proc entries may not
* actually be removed until they are no longer used by anyone.
*/
void unregister_sysctl_table(struct ctl_table_header * header)
{
might_sleep();
if (header == NULL)
return;
spin_lock(&sysctl_lock);
start_unregistering(header);
if (!--header->parent->count) {
WARN_ON(1);
kfree_rcu(header->parent, rcu);
}
if (!--header->count)
kfree_rcu(header, rcu);
spin_unlock(&sysctl_lock);
}
int sysctl_is_seen(struct ctl_table_header *p)
{
struct ctl_table_set *set = p->set;
int res;
spin_lock(&sysctl_lock);
if (p->unregistering)
res = 0;
else if (!set->is_seen)
res = 1;
else
res = set->is_seen(set);
spin_unlock(&sysctl_lock);
return res;
}
void setup_sysctl_set(struct ctl_table_set *p,
struct ctl_table_set *parent,
int (*is_seen)(struct ctl_table_set *))
{
INIT_LIST_HEAD(&p->list);
p->parent = parent ? parent : &sysctl_table_root.default_set;
p->is_seen = is_seen;
}
#else /* !CONFIG_SYSCTL */
struct ctl_table_header *register_sysctl_table(struct ctl_table * table)
{
return NULL;
}
struct ctl_table_header *register_sysctl_paths(const struct ctl_path *path,
struct ctl_table *table)
{
return NULL;
}
void unregister_sysctl_table(struct ctl_table_header * table)
{
}
void setup_sysctl_set(struct ctl_table_set *p,
struct ctl_table_set *parent,
int (*is_seen)(struct ctl_table_set *))
{
}
void sysctl_head_put(struct ctl_table_header *head)
{
}
#endif /* CONFIG_SYSCTL */
/*
@@ -2432,7 +1943,7 @@ static int proc_taint(struct ctl_table *table, int write,
}
#ifdef CONFIG_PRINTK
static int proc_dmesg_restrict(struct ctl_table *table, int write,
static int proc_dointvec_minmax_sysadmin(struct ctl_table *table, int write,
void __user *buffer, size_t *lenp, loff_t *ppos)
{
if (write && !capable(CAP_SYS_ADMIN))
@@ -2885,9 +2396,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
}
}
while (val_a <= val_b)
set_bit(val_a++, tmp_bitmap);
bitmap_set(tmp_bitmap, val_a, val_b - val_a + 1);
first = 0;
proc_skip_char(&kbuf, &left, '\n');
}
@@ -2930,8 +2439,7 @@ int proc_do_large_bitmap(struct ctl_table *table, int write,
if (*ppos)
bitmap_or(bitmap, bitmap, tmp_bitmap, bitmap_len);
else
memcpy(bitmap, tmp_bitmap,
BITS_TO_LONGS(bitmap_len) * sizeof(unsigned long));
bitmap_copy(bitmap, tmp_bitmap, bitmap_len);
}
kfree(tmp_bitmap);
*lenp -= left;
@@ -3009,6 +2517,3 @@ EXPORT_SYMBOL(proc_dointvec_ms_jiffies);
EXPORT_SYMBOL(proc_dostring);
EXPORT_SYMBOL(proc_doulongvec_minmax);
EXPORT_SYMBOL(proc_doulongvec_ms_jiffies_minmax);
EXPORT_SYMBOL(register_sysctl_table);
EXPORT_SYMBOL(register_sysctl_paths);
EXPORT_SYMBOL(unregister_sysctl_table);
kernel/sysctl_check.c
-160
View File
@@ -1,160 +0,0 @@
#include <linux/stat.h>
#include <linux/sysctl.h>
#include "../fs/xfs/xfs_sysctl.h"
#include <linux/sunrpc/debug.h>
#include <linux/string.h>
#include <net/ip_vs.h>
static int sysctl_depth(struct ctl_table *table)
{
struct ctl_table *tmp;
int depth;
depth = 0;
for (tmp = table; tmp->parent; tmp = tmp->parent)
depth++;
return depth;
}
static struct ctl_table *sysctl_parent(struct ctl_table *table, int n)
{
int i;
for (i = 0; table && i < n; i++)
table = table->parent;
return table;
}
static void sysctl_print_path(struct ctl_table *table)
{
struct ctl_table *tmp;
int depth, i;
depth = sysctl_depth(table);
if (table->procname) {
for (i = depth; i >= 0; i--) {
tmp = sysctl_parent(table, i);
printk("/%s", tmp->procname?tmp->procname:"");
}
}
printk(" ");
}
static struct ctl_table *sysctl_check_lookup(struct nsproxy *namespaces,
struct ctl_table *table)
{
struct ctl_table_header *head;
struct ctl_table *ref, *test;
int depth, cur_depth;
depth = sysctl_depth(table);
for (head = __sysctl_head_next(namespaces, NULL); head;
head = __sysctl_head_next(namespaces, head)) {
cur_depth = depth;
ref = head->ctl_table;
repeat:
test = sysctl_parent(table, cur_depth);
for (; ref->procname; ref++) {
int match = 0;
if (cur_depth && !ref->child)
continue;
if (test->procname && ref->procname &&
(strcmp(test->procname, ref->procname) == 0))
match++;
if (match) {
if (cur_depth != 0) {
cur_depth--;
ref = ref->child;
goto repeat;
}
goto out;
}
}
}
ref = NULL;
out:
sysctl_head_finish(head);
return ref;
}
static void set_fail(const char **fail, struct ctl_table *table, const char *str)
{
if (*fail) {
printk(KERN_ERR "sysctl table check failed: ");
sysctl_print_path(table);
printk(" %s\n", *fail);
dump_stack();
}
*fail = str;
}
static void sysctl_check_leaf(struct nsproxy *namespaces,
struct ctl_table *table, const char **fail)
{
struct ctl_table *ref;
ref = sysctl_check_lookup(namespaces, table);
if (ref && (ref != table))
set_fail(fail, table, "Sysctl already exists");
}
int sysctl_check_table(struct nsproxy *namespaces, struct ctl_table *table)
{
int error = 0;
for (; table->procname; table++) {
const char *fail = NULL;
if (table->parent) {
if (!table->parent->procname)
set_fail(&fail, table, "Parent without procname");
}
if (table->child) {
if (table->data)
set_fail(&fail, table, "Directory with data?");
if (table->maxlen)
set_fail(&fail, table, "Directory with maxlen?");
if ((table->mode & (S_IRUGO|S_IXUGO)) != table->mode)
set_fail(&fail, table, "Writable sysctl directory");
if (table->proc_handler)
set_fail(&fail, table, "Directory with proc_handler");
if (table->extra1)
set_fail(&fail, table, "Directory with extra1");
if (table->extra2)
set_fail(&fail, table, "Directory with extra2");
} else {
if ((table->proc_handler == proc_dostring) ||
(table->proc_handler == proc_dointvec) ||
(table->proc_handler == proc_dointvec_minmax) ||
(table->proc_handler == proc_dointvec_jiffies) ||
(table->proc_handler == proc_dointvec_userhz_jiffies) ||
(table->proc_handler == proc_dointvec_ms_jiffies) ||
(table->proc_handler == proc_doulongvec_minmax) ||
(table->proc_handler == proc_doulongvec_ms_jiffies_minmax)) {
if (!table->data)
set_fail(&fail, table, "No data");
if (!table->maxlen)
set_fail(&fail, table, "No maxlen");
}
#ifdef CONFIG_PROC_SYSCTL
if (!table->proc_handler)
set_fail(&fail, table, "No proc_handler");
#endif
sysctl_check_leaf(namespaces, table, &fail);
}
if (table->mode > 0777)
set_fail(&fail, table, "bogus .mode");
if (fail) {
set_fail(&fail, table, NULL);
error = -EINVAL;
}
if (table->child)
error |= sysctl_check_table(namespaces, table->child);
}
return error;
}
kernel/time.c
-6
View File
@@ -163,7 +163,6 @@ int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz)
return error;
if (tz) {
/* SMP safe, global irq locking makes it work. */
sys_tz = *tz;
update_vsyscall_tz();
if (firsttime) {
@@ -173,12 +172,7 @@ int do_sys_settimeofday(const struct timespec *tv, const struct timezone *tz)
}
}
if (tv)
{
/* SMP safe, again the code in arch/foo/time.c should
* globally block out interrupts when it runs.
*/
return do_settimeofday(tv);
}
return 0;
}
kernel/time/Kconfig
+4
View File
@@ -1,6 +1,10 @@
#
# Timer subsystem related configuration options
#
# Core internal switch. Selected by NO_HZ / HIGH_RES_TIMERS. This is
# only related to the tick functionality. Oneshot clockevent devices
# are supported independ of this.
config TICK_ONESHOT
bool
kernel/time/alarmtimer.c
+8
View File
@@ -96,6 +96,11 @@ static int alarmtimer_rtc_add_device(struct device *dev,
return 0;
}
static inline void alarmtimer_rtc_timer_init(void)
{
rtc_timer_init(&rtctimer, NULL, NULL);
}
static struct class_interface alarmtimer_rtc_interface = {
.add_dev = &alarmtimer_rtc_add_device,
};
@@ -117,6 +122,7 @@ static inline struct rtc_device *alarmtimer_get_rtcdev(void)
#define rtcdev (NULL)
static inline int alarmtimer_rtc_interface_setup(void) { return 0; }
static inline void alarmtimer_rtc_interface_remove(void) { }
static inline void alarmtimer_rtc_timer_init(void) { }
#endif
/**
@@ -783,6 +789,8 @@ static int __init alarmtimer_init(void)
.nsleep = alarm_timer_nsleep,
};
alarmtimer_rtc_timer_init();
posix_timers_register_clock(CLOCK_REALTIME_ALARM, &alarm_clock);
posix_timers_register_clock(CLOCK_BOOTTIME_ALARM, &alarm_clock);
kernel/time/clocksource.c
+1 -1
View File
@@ -500,7 +500,7 @@ static u32 clocksource_max_adjustment(struct clocksource *cs)
{
u64 ret;
/*
* We won't try to correct for more then 11% adjustments (110,000 ppm),
* We won't try to correct for more than 11% adjustments (110,000 ppm),
*/
ret = (u64)cs->mult * 11;
do_div(ret,100);
kernel/time/ntp.c
+51 -101
View File
@@ -34,8 +34,6 @@ unsigned long tick_nsec;
static u64 tick_length;
static u64 tick_length_base;
static struct hrtimer leap_timer;
#define MAX_TICKADJ 500LL /* usecs */
#define MAX_TICKADJ_SCALED \
(((MAX_TICKADJ * NSEC_PER_USEC) << NTP_SCALE_SHIFT) / NTP_INTERVAL_FREQ)
@@ -380,57 +378,6 @@ u64 ntp_tick_length(void)
}
/*
* Leap second processing. If in leap-insert state at the end of the
* day, the system clock is set back one second; if in leap-delete
* state, the system clock is set ahead one second.
*/
static enum hrtimer_restart ntp_leap_second(struct hrtimer *timer)
{
enum hrtimer_restart res = HRTIMER_NORESTART;
unsigned long flags;
int leap = 0;
spin_lock_irqsave(&ntp_lock, flags);
switch (time_state) {
case TIME_OK:
break;
case TIME_INS:
leap = -1;
time_state = TIME_OOP;
printk(KERN_NOTICE
"Clock: inserting leap second 23:59:60 UTC\n");
hrtimer_add_expires_ns(&leap_timer, NSEC_PER_SEC);
res = HRTIMER_RESTART;
break;
case TIME_DEL:
leap = 1;
time_tai--;
time_state = TIME_WAIT;
printk(KERN_NOTICE
"Clock: deleting leap second 23:59:59 UTC\n");
break;
case TIME_OOP:
time_tai++;
time_state = TIME_WAIT;
/* fall through */
case TIME_WAIT:
if (!(time_status & (STA_INS | STA_DEL)))
time_state = TIME_OK;
break;
}
spin_unlock_irqrestore(&ntp_lock, flags);
/*
* We have to call this outside of the ntp_lock to keep
* the proper locking hierarchy
*/
if (leap)
timekeeping_leap_insert(leap);
return res;
}
/*
* this routine handles the overflow of the microsecond field
*
@@ -438,14 +385,58 @@ static enum hrtimer_restart ntp_leap_second(struct hrtimer *timer)
* were provided by Dave Mills (Mills@UDEL.EDU) of NTP fame.
* They were originally developed for SUN and DEC kernels.
* All the kudos should go to Dave for this stuff.
*
* Also handles leap second processing, and returns leap offset
*/
void second_overflow(void)
int second_overflow(unsigned long secs)
{
s64 delta;
int leap = 0;
unsigned long flags;
spin_lock_irqsave(&ntp_lock, flags);
/*
* Leap second processing. If in leap-insert state at the end of the
* day, the system clock is set back one second; if in leap-delete
* state, the system clock is set ahead one second.
*/
switch (time_state) {
case TIME_OK:
if (time_status & STA_INS)
time_state = TIME_INS;
else if (time_status & STA_DEL)
time_state = TIME_DEL;
break;
case TIME_INS:
if (secs % 86400 == 0) {
leap = -1;
time_state = TIME_OOP;
printk(KERN_NOTICE
"Clock: inserting leap second 23:59:60 UTC\n");
}
break;
case TIME_DEL:
if ((secs + 1) % 86400 == 0) {
leap = 1;
time_tai--;
time_state = TIME_WAIT;
printk(KERN_NOTICE
"Clock: deleting leap second 23:59:59 UTC\n");
}
break;
case TIME_OOP:
time_tai++;
time_state = TIME_WAIT;
break;
case TIME_WAIT:
if (!(time_status & (STA_INS | STA_DEL)))
time_state = TIME_OK;
break;
}
/* Bump the maxerror field */
time_maxerror += MAXFREQ / NSEC_PER_USEC;
if (time_maxerror > NTP_PHASE_LIMIT) {
@@ -481,15 +472,17 @@ void second_overflow(void)
tick_length += (s64)(time_adjust * NSEC_PER_USEC / NTP_INTERVAL_FREQ)
<< NTP_SCALE_SHIFT;
time_adjust = 0;
out:
spin_unlock_irqrestore(&ntp_lock, flags);
return leap;
}
#ifdef CONFIG_GENERIC_CMOS_UPDATE
/* Disable the cmos update - used by virtualization and embedded */
int no_sync_cmos_clock __read_mostly;
static void sync_cmos_clock(struct work_struct *work);
static DECLARE_DELAYED_WORK(sync_cmos_work, sync_cmos_clock);
@@ -536,35 +529,13 @@ static void sync_cmos_clock(struct work_struct *work)
static void notify_cmos_timer(void)
{
if (!no_sync_cmos_clock)
schedule_delayed_work(&sync_cmos_work, 0);
schedule_delayed_work(&sync_cmos_work, 0);
}
#else
static inline void notify_cmos_timer(void) { }
#endif
/*
* Start the leap seconds timer:
*/
static inline void ntp_start_leap_timer(struct timespec *ts)
{
long now = ts->tv_sec;
if (time_status & STA_INS) {
time_state = TIME_INS;
now += 86400 - now % 86400;
hrtimer_start(&leap_timer, ktime_set(now, 0), HRTIMER_MODE_ABS);
return;
}
if (time_status & STA_DEL) {
time_state = TIME_DEL;
now += 86400 - (now + 1) % 86400;
hrtimer_start(&leap_timer, ktime_set(now, 0), HRTIMER_MODE_ABS);
}
}
/*
* Propagate a new txc->status value into the NTP state:
@@ -589,22 +560,6 @@ static inline void process_adj_status(struct timex *txc, struct timespec *ts)
time_status &= STA_RONLY;
time_status |= txc->status & ~STA_RONLY;
switch (time_state) {
case TIME_OK:
ntp_start_leap_timer(ts);
break;
case TIME_INS:
case TIME_DEL:
time_state = TIME_OK;
ntp_start_leap_timer(ts);
case TIME_WAIT:
if (!(time_status & (STA_INS | STA_DEL)))
time_state = TIME_OK;
break;
case TIME_OOP:
hrtimer_restart(&leap_timer);
break;
}
}
/*
* Called with the xtime lock held, so we can access and modify
@@ -686,9 +641,6 @@ int do_adjtimex(struct timex *txc)
(txc->tick < 900000/USER_HZ ||
txc->tick > 1100000/USER_HZ))
return -EINVAL;
if (txc->modes & ADJ_STATUS && time_state != TIME_OK)
hrtimer_cancel(&leap_timer);
}
if (txc->modes & ADJ_SETOFFSET) {
@@ -1010,6 +962,4 @@ __setup("ntp_tick_adj=", ntp_tick_adj_setup);
void __init ntp_init(void)
{
ntp_clear();
hrtimer_init(&leap_timer, CLOCK_REALTIME, HRTIMER_MODE_ABS);
leap_timer.function = ntp_leap_second;
}
kernel/time/tick-broadcast.c
+3 -1
View File
@@ -575,10 +575,12 @@ void tick_broadcast_switch_to_oneshot(void)
unsigned long flags;
raw_spin_lock_irqsave(&tick_broadcast_lock, flags);
tick_broadcast_device.mode = TICKDEV_MODE_ONESHOT;
if (cpumask_empty(tick_get_broadcast_mask()))
goto end;
tick_broadcast_device.mode = TICKDEV_MODE_ONESHOT;
bc = tick_broadcast_device.evtdev;
if (bc)
tick_broadcast_setup_oneshot(bc);
kernel/time/tick-sched.c
+2 -2
View File
@@ -534,9 +534,9 @@ static void tick_nohz_restart(struct tick_sched *ts, ktime_t now)
hrtimer_get_expires(&ts->sched_timer), 0))
break;
}
/* Update jiffies and reread time */
tick_do_update_jiffies64(now);
/* Reread time and update jiffies */
now = ktime_get();
tick_do_update_jiffies64(now);
}
}
kernel/time/timekeeping.c
+26 -25
View File
@@ -184,18 +184,6 @@ static void timekeeping_update(bool clearntp)
}
void timekeeping_leap_insert(int leapsecond)
{
unsigned long flags;
write_seqlock_irqsave(&timekeeper.lock, flags);
timekeeper.xtime.tv_sec += leapsecond;
timekeeper.wall_to_monotonic.tv_sec -= leapsecond;
timekeeping_update(false);
write_sequnlock_irqrestore(&timekeeper.lock, flags);
}
/**
* timekeeping_forward_now - update clock to the current time
*
@@ -448,9 +436,12 @@ EXPORT_SYMBOL(timekeeping_inject_offset);
static int change_clocksource(void *data)
{
struct clocksource *new, *old;
unsigned long flags;
new = (struct clocksource *) data;
write_seqlock_irqsave(&timekeeper.lock, flags);
timekeeping_forward_now();
if (!new->enable || new->enable(new) == 0) {
old = timekeeper.clock;
@@ -458,6 +449,10 @@ static int change_clocksource(void *data)
if (old->disable)
old->disable(old);
}
timekeeping_update(true);
write_sequnlock_irqrestore(&timekeeper.lock, flags);
return 0;
}
@@ -827,7 +822,7 @@ static void timekeeping_adjust(s64 offset)
int adj;
/*
* The point of this is to check if the error is greater then half
* The point of this is to check if the error is greater than half
* an interval.
*
* First we shift it down from NTP_SHIFT to clocksource->shifted nsecs.
@@ -835,7 +830,7 @@ static void timekeeping_adjust(s64 offset)
* Note we subtract one in the shift, so that error is really error*2.
* This "saves" dividing(shifting) interval twice, but keeps the
* (error > interval) comparison as still measuring if error is
* larger then half an interval.
* larger than half an interval.
*
* Note: It does not "save" on aggravation when reading the code.
*/
@@ -843,7 +838,7 @@ static void timekeeping_adjust(s64 offset)
if (error > interval) {
/*
* We now divide error by 4(via shift), which checks if
* the error is greater then twice the interval.
* the error is greater than twice the interval.
* If it is greater, we need a bigadjust, if its smaller,
* we can adjust by 1.
*/
@@ -874,13 +869,15 @@ static void timekeeping_adjust(s64 offset)
} else /* No adjustment needed */
return;
WARN_ONCE(timekeeper.clock->maxadj &&
(timekeeper.mult + adj > timekeeper.clock->mult +
timekeeper.clock->maxadj),
"Adjusting %s more then 11%% (%ld vs %ld)\n",
if (unlikely(timekeeper.clock->maxadj &&
(timekeeper.mult + adj >
timekeeper.clock->mult + timekeeper.clock->maxadj))) {
printk_once(KERN_WARNING
"Adjusting %s more than 11%% (%ld vs %ld)\n",
timekeeper.clock->name, (long)timekeeper.mult + adj,
(long)timekeeper.clock->mult +
timekeeper.clock->maxadj);
}
/*
* So the following can be confusing.
*
@@ -952,7 +949,7 @@ static cycle_t logarithmic_accumulation(cycle_t offset, int shift)
u64 nsecps = (u64)NSEC_PER_SEC << timekeeper.shift;
u64 raw_nsecs;
/* If the offset is smaller then a shifted interval, do nothing */
/* If the offset is smaller than a shifted interval, do nothing */
if (offset < timekeeper.cycle_interval<<shift)
return offset;
@@ -962,9 +959,11 @@ static cycle_t logarithmic_accumulation(cycle_t offset, int shift)
timekeeper.xtime_nsec += timekeeper.xtime_interval << shift;
while (timekeeper.xtime_nsec >= nsecps) {
int leap;
timekeeper.xtime_nsec -= nsecps;
timekeeper.xtime.tv_sec++;
second_overflow();
leap = second_overflow(timekeeper.xtime.tv_sec);
timekeeper.xtime.tv_sec += leap;
}
/* Accumulate raw time */
@@ -1018,13 +1017,13 @@ static void update_wall_time(void)
* With NO_HZ we may have to accumulate many cycle_intervals
* (think "ticks") worth of time at once. To do this efficiently,
* we calculate the largest doubling multiple of cycle_intervals
* that is smaller then the offset. We then accumulate that
* that is smaller than the offset. We then accumulate that
* chunk in one go, and then try to consume the next smaller
* doubled multiple.
*/
shift = ilog2(offset) - ilog2(timekeeper.cycle_interval);
shift = max(0, shift);
/* Bound shift to one less then what overflows tick_length */
/* Bound shift to one less than what overflows tick_length */
maxshift = (64 - (ilog2(ntp_tick_length())+1)) - 1;
shift = min(shift, maxshift);
while (offset >= timekeeper.cycle_interval) {
@@ -1072,12 +1071,14 @@ static void update_wall_time(void)
/*
* Finally, make sure that after the rounding
* xtime.tv_nsec isn't larger then NSEC_PER_SEC
* xtime.tv_nsec isn't larger than NSEC_PER_SEC
*/
if (unlikely(timekeeper.xtime.tv_nsec >= NSEC_PER_SEC)) {
int leap;
timekeeper.xtime.tv_nsec -= NSEC_PER_SEC;
timekeeper.xtime.tv_sec++;
second_overflow();
leap = second_overflow(timekeeper.xtime.tv_sec);
timekeeper.xtime.tv_sec += leap;
}
timekeeping_update(false);
kernel/trace/Kconfig
+1 -1
View File
@@ -141,7 +141,7 @@ if FTRACE
config FUNCTION_TRACER
bool "Kernel Function Tracer"
depends on HAVE_FUNCTION_TRACER
select FRAME_POINTER if !ARM_UNWIND && !S390 && !MICROBLAZE
select FRAME_POINTER if !ARM_UNWIND && !PPC && !S390 && !MICROBLAZE
select KALLSYMS
select GENERIC_TRACER
select CONTEXT_SWITCH_TRACER
kernel/trace/blktrace.c
+2 -16
View File
@@ -311,13 +311,6 @@ int blk_trace_remove(struct request_queue *q)
}
EXPORT_SYMBOL_GPL(blk_trace_remove);
static int blk_dropped_open(struct inode *inode, struct file *filp)
{
filp->private_data = inode->i_private;
return 0;
}
static ssize_t blk_dropped_read(struct file *filp, char __user *buffer,
size_t count, loff_t *ppos)
{
@@ -331,18 +324,11 @@ static ssize_t blk_dropped_read(struct file *filp, char __user *buffer,
static const struct file_operations blk_dropped_fops = {
.owner = THIS_MODULE,
.open = blk_dropped_open,
.open = simple_open,
.read = blk_dropped_read,
.llseek = default_llseek,
};
static int blk_msg_open(struct inode *inode, struct file *filp)
{
filp->private_data = inode->i_private;
return 0;
}
static ssize_t blk_msg_write(struct file *filp, const char __user *buffer,
size_t count, loff_t *ppos)
{
@@ -371,7 +357,7 @@ static ssize_t blk_msg_write(struct file *filp, const char __user *buffer,
static const struct file_operations blk_msg_fops = {
.owner = THIS_MODULE,
.open = blk_msg_open,
.open = simple_open,
.write = blk_msg_write,
.llseek = noop_llseek,
};
kernel/trace/ftrace.c
+2 -1
View File
@@ -249,7 +249,8 @@ static void update_ftrace_function(void)
#else
__ftrace_trace_function = func;
#endif
ftrace_trace_function = ftrace_test_stop_func;
ftrace_trace_function =
(func == ftrace_stub) ? func : ftrace_test_stop_func;
#endif
}
kernel/trace/ring_buffer.c
+60 -97
View File
@@ -154,34 +154,11 @@ enum {
static unsigned long ring_buffer_flags __read_mostly = RB_BUFFERS_ON;
/* Used for individual buffers (after the counter) */
#define RB_BUFFER_OFF (1 << 20)
#define BUF_PAGE_HDR_SIZE offsetof(struct buffer_data_page, data)
/**
* tracing_on - enable all tracing buffers
*
* This function enables all tracing buffers that may have been
* disabled with tracing_off.
*/
void tracing_on(void)
{
set_bit(RB_BUFFERS_ON_BIT, &ring_buffer_flags);
}
EXPORT_SYMBOL_GPL(tracing_on);
/**
* tracing_off - turn off all tracing buffers
*
* This function stops all tracing buffers from recording data.
* It does not disable any overhead the tracers themselves may
* be causing. This function simply causes all recording to
* the ring buffers to fail.
*/
void tracing_off(void)
{
clear_bit(RB_BUFFERS_ON_BIT, &ring_buffer_flags);
}
EXPORT_SYMBOL_GPL(tracing_off);
/**
* tracing_off_permanent - permanently disable ring buffers
*
@@ -193,15 +170,6 @@ void tracing_off_permanent(void)
set_bit(RB_BUFFERS_DISABLED_BIT, &ring_buffer_flags);
}
/**
* tracing_is_on - show state of ring buffers enabled
*/
int tracing_is_on(void)
{
return ring_buffer_flags == RB_BUFFERS_ON;
}
EXPORT_SYMBOL_GPL(tracing_is_on);
#define RB_EVNT_HDR_SIZE (offsetof(struct ring_buffer_event, array))
#define RB_ALIGNMENT 4U
#define RB_MAX_SMALL_DATA (RB_ALIGNMENT * RINGBUF_TYPE_DATA_TYPE_LEN_MAX)
@@ -2618,6 +2586,63 @@ void ring_buffer_record_enable(struct ring_buffer *buffer)
}
EXPORT_SYMBOL_GPL(ring_buffer_record_enable);
/**
* ring_buffer_record_off - stop all writes into the buffer
* @buffer: The ring buffer to stop writes to.
*
* This prevents all writes to the buffer. Any attempt to write
* to the buffer after this will fail and return NULL.
*
* This is different than ring_buffer_record_disable() as
* it works like an on/off switch, where as the disable() verison
* must be paired with a enable().
*/
void ring_buffer_record_off(struct ring_buffer *buffer)
{
unsigned int rd;
unsigned int new_rd;
do {
rd = atomic_read(&buffer->record_disabled);
new_rd = rd | RB_BUFFER_OFF;
} while (atomic_cmpxchg(&buffer->record_disabled, rd, new_rd) != rd);
}
EXPORT_SYMBOL_GPL(ring_buffer_record_off);
/**
* ring_buffer_record_on - restart writes into the buffer
* @buffer: The ring buffer to start writes to.
*
* This enables all writes to the buffer that was disabled by
* ring_buffer_record_off().
*
* This is different than ring_buffer_record_enable() as
* it works like an on/off switch, where as the enable() verison
* must be paired with a disable().
*/
void ring_buffer_record_on(struct ring_buffer *buffer)
{
unsigned int rd;
unsigned int new_rd;
do {
rd = atomic_read(&buffer->record_disabled);
new_rd = rd & ~RB_BUFFER_OFF;
} while (atomic_cmpxchg(&buffer->record_disabled, rd, new_rd) != rd);
}
EXPORT_SYMBOL_GPL(ring_buffer_record_on);
/**
* ring_buffer_record_is_on - return true if the ring buffer can write
* @buffer: The ring buffer to see if write is enabled
*
* Returns true if the ring buffer is in a state that it accepts writes.
*/
int ring_buffer_record_is_on(struct ring_buffer *buffer)
{
return !atomic_read(&buffer->record_disabled);
}
/**
* ring_buffer_record_disable_cpu - stop all writes into the cpu_buffer
* @buffer: The ring buffer to stop writes to.
@@ -4039,68 +4064,6 @@ int ring_buffer_read_page(struct ring_buffer *buffer,
}
EXPORT_SYMBOL_GPL(ring_buffer_read_page);
#ifdef CONFIG_TRACING
static ssize_t
rb_simple_read(struct file *filp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
unsigned long *p = filp->private_data;
char buf[64];
int r;
if (test_bit(RB_BUFFERS_DISABLED_BIT, p))
r = sprintf(buf, "permanently disabled\n");
else
r = sprintf(buf, "%d\n", test_bit(RB_BUFFERS_ON_BIT, p));
return simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
}
static ssize_t
rb_simple_write(struct file *filp, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
unsigned long *p = filp->private_data;
unsigned long val;
int ret;
ret = kstrtoul_from_user(ubuf, cnt, 10, &val);
if (ret)
return ret;
if (val)
set_bit(RB_BUFFERS_ON_BIT, p);
else
clear_bit(RB_BUFFERS_ON_BIT, p);
(*ppos)++;
return cnt;
}
static const struct file_operations rb_simple_fops = {
.open = tracing_open_generic,
.read = rb_simple_read,
.write = rb_simple_write,
.llseek = default_llseek,
};
static __init int rb_init_debugfs(void)
{
struct dentry *d_tracer;
d_tracer = tracing_init_dentry();
trace_create_file("tracing_on", 0644, d_tracer,
&ring_buffer_flags, &rb_simple_fops);
return 0;
}
fs_initcall(rb_init_debugfs);
#endif
#ifdef CONFIG_HOTPLUG_CPU
static int rb_cpu_notify(struct notifier_block *self,
unsigned long action, void *hcpu)
kernel/trace/trace.c
+113
View File
@@ -36,6 +36,7 @@
#include <linux/ctype.h>
#include <linux/init.h>
#include <linux/poll.h>
#include <linux/nmi.h>
#include <linux/fs.h>
#include "trace.h"
@@ -351,6 +352,59 @@ static void wakeup_work_handler(struct work_struct *work)
static DECLARE_DELAYED_WORK(wakeup_work, wakeup_work_handler);
/**
* tracing_on - enable tracing buffers
*
* This function enables tracing buffers that may have been
* disabled with tracing_off.
*/
void tracing_on(void)
{
if (global_trace.buffer)
ring_buffer_record_on(global_trace.buffer);
/*
* This flag is only looked at when buffers haven't been
* allocated yet. We don't really care about the race
* between setting this flag and actually turning
* on the buffer.
*/
global_trace.buffer_disabled = 0;
}
EXPORT_SYMBOL_GPL(tracing_on);
/**
* tracing_off - turn off tracing buffers
*
* This function stops the tracing buffers from recording data.
* It does not disable any overhead the tracers themselves may
* be causing. This function simply causes all recording to
* the ring buffers to fail.
*/
void tracing_off(void)
{
if (global_trace.buffer)
ring_buffer_record_on(global_trace.buffer);
/*
* This flag is only looked at when buffers haven't been
* allocated yet. We don't really care about the race
* between setting this flag and actually turning
* on the buffer.
*/
global_trace.buffer_disabled = 1;
}
EXPORT_SYMBOL_GPL(tracing_off);
/**
* tracing_is_on - show state of ring buffers enabled
*/
int tracing_is_on(void)
{
if (global_trace.buffer)
return ring_buffer_record_is_on(global_trace.buffer);
return !global_trace.buffer_disabled;
}
EXPORT_SYMBOL_GPL(tracing_is_on);
/**
* trace_wake_up - wake up tasks waiting for trace input
*
@@ -1644,6 +1698,7 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu,
int cpu_file = iter->cpu_file;
u64 next_ts = 0, ts;
int next_cpu = -1;
int next_size = 0;
int cpu;
/*
@@ -1675,9 +1730,12 @@ __find_next_entry(struct trace_iterator *iter, int *ent_cpu,
next_cpu = cpu;
next_ts = ts;
next_lost = lost_events;
next_size = iter->ent_size;
}
}
iter->ent_size = next_size;
if (ent_cpu)
*ent_cpu = next_cpu;
@@ -4567,6 +4625,55 @@ static __init void create_trace_options_dir(void)
create_trace_option_core_file(trace_options[i], i);
}
static ssize_t
rb_simple_read(struct file *filp, char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct ring_buffer *buffer = filp->private_data;
char buf[64];
int r;
if (buffer)
r = ring_buffer_record_is_on(buffer);
else
r = 0;
r = sprintf(buf, "%d\n", r);
return simple_read_from_buffer(ubuf, cnt, ppos, buf, r);
}
static ssize_t
rb_simple_write(struct file *filp, const char __user *ubuf,
size_t cnt, loff_t *ppos)
{
struct ring_buffer *buffer = filp->private_data;
unsigned long val;
int ret;
ret = kstrtoul_from_user(ubuf, cnt, 10, &val);
if (ret)
return ret;
if (buffer) {
if (val)
ring_buffer_record_on(buffer);
else
ring_buffer_record_off(buffer);
}
(*ppos)++;
return cnt;
}
static const struct file_operations rb_simple_fops = {
.open = tracing_open_generic,
.read = rb_simple_read,
.write = rb_simple_write,
.llseek = default_llseek,
};
static __init int tracer_init_debugfs(void)
{
struct dentry *d_tracer;
@@ -4626,6 +4733,9 @@ static __init int tracer_init_debugfs(void)
trace_create_file("trace_clock", 0644, d_tracer, NULL,
&trace_clock_fops);
trace_create_file("tracing_on", 0644, d_tracer,
global_trace.buffer, &rb_simple_fops);
#ifdef CONFIG_DYNAMIC_FTRACE
trace_create_file("dyn_ftrace_total_info", 0444, d_tracer,
&ftrace_update_tot_cnt, &tracing_dyn_info_fops);
@@ -4798,6 +4908,7 @@ __ftrace_dump(bool disable_tracing, enum ftrace_dump_mode oops_dump_mode)
if (ret != TRACE_TYPE_NO_CONSUME)
trace_consume(&iter);
}
touch_nmi_watchdog();
trace_printk_seq(&iter.seq);
}
@@ -4863,6 +4974,8 @@ __init static int tracer_alloc_buffers(void)
goto out_free_cpumask;
}
global_trace.entries = ring_buffer_size(global_trace.buffer);
if (global_trace.buffer_disabled)
tracing_off();
#ifdef CONFIG_TRACER_MAX_TRACE
kernel/trace/trace.h
+1 -2
View File
@@ -154,6 +154,7 @@ struct trace_array {
struct ring_buffer *buffer;
unsigned long entries;
int cpu;
int buffer_disabled;
cycle_t time_start;
struct task_struct *waiter;
struct trace_array_cpu *data[NR_CPUS];
@@ -835,13 +836,11 @@ extern const char *__stop___trace_bprintk_fmt[];
filter)
#include "trace_entries.h"
#ifdef CONFIG_PERF_EVENTS
#ifdef CONFIG_FUNCTION_TRACER
int perf_ftrace_event_register(struct ftrace_event_call *call,
enum trace_reg type, void *data);
#else
#define perf_ftrace_event_register NULL
#endif /* CONFIG_FUNCTION_TRACER */
#endif /* CONFIG_PERF_EVENTS */
#endif /* _LINUX_KERNEL_TRACE_H */
kernel/trace/trace_entries.h
+12 -4
View File
@@ -166,6 +166,12 @@ FTRACE_ENTRY_DUP(wakeup, ctx_switch_entry,
#define FTRACE_STACK_ENTRIES 8
#ifndef CONFIG_64BIT
# define IP_FMT "%08lx"
#else
# define IP_FMT "%016lx"
#endif
FTRACE_ENTRY(kernel_stack, stack_entry,
TRACE_STACK,
@@ -175,8 +181,9 @@ FTRACE_ENTRY(kernel_stack, stack_entry,
__dynamic_array(unsigned long, caller )
),
F_printk("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n"
"\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n",
F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
"\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
"\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n",
__entry->caller[0], __entry->caller[1], __entry->caller[2],
__entry->caller[3], __entry->caller[4], __entry->caller[5],
__entry->caller[6], __entry->caller[7]),
@@ -193,8 +200,9 @@ FTRACE_ENTRY(user_stack, userstack_entry,
__array( unsigned long, caller, FTRACE_STACK_ENTRIES )
),
F_printk("\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n"
"\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n\t=> (%08lx)\n",
F_printk("\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
"\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n"
"\t=> (" IP_FMT ")\n\t=> (" IP_FMT ")\n",
__entry->caller[0], __entry->caller[1], __entry->caller[2],
__entry->caller[3], __entry->caller[4], __entry->caller[5],
__entry->caller[6], __entry->caller[7]),
kernel/trace/trace_export.c
+1 -1
View File
@@ -162,7 +162,7 @@ ftrace_define_fields_##name(struct ftrace_event_call *event_call) \
#define __dynamic_array(type, item)
#undef F_printk
#define F_printk(fmt, args...) #fmt ", " __stringify(args)
#define F_printk(fmt, args...) __stringify(fmt) ", " __stringify(args)
#undef FTRACE_ENTRY_REG
#define FTRACE_ENTRY_REG(call, struct_name, etype, tstruct, print, filter,\