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Merge branch 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

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* 'core-locking-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (26 commits)
  clockevents: Convert to raw_spinlock
  clockevents: Make tick_device_lock static
  debugobjects: Convert to raw_spinlocks
  perf_event: Convert to raw_spinlock
  hrtimers: Convert to raw_spinlocks
  genirq: Convert irq_desc.lock to raw_spinlock
  smp: Convert smplocks to raw_spinlocks
  rtmutes: Convert rtmutex.lock to raw_spinlock
  sched: Convert pi_lock to raw_spinlock
  sched: Convert cpupri lock to raw_spinlock
  sched: Convert rt_runtime_lock to raw_spinlock
  sched: Convert rq->lock to raw_spinlock
  plist: Make plist debugging raw_spinlock aware
  bkl: Fixup core_lock fallout
  locking: Cleanup the name space completely
  locking: Further name space cleanups
  alpha: Fix fallout from locking changes
  locking: Implement new raw_spinlock
  locking: Convert raw_rwlock functions to arch_rwlock
  locking: Convert raw_rwlock to arch_rwlock
  ...
This commit is contained in:
Linus Torvalds
2009-12-15 09:02:01 -08:00
parent 050cbb09da b5f91da0a6
commit 8f0ddf91f2
136 changed files with 2485 additions and 2177 deletions
Download Patch File Download Diff File Expand all files Collapse all files
include/asm-generic/bitops/atomic.h
+5 -5
View File
@@ -15,19 +15,19 @@
# define ATOMIC_HASH_SIZE 4
# define ATOMIC_HASH(a) (&(__atomic_hash[ (((unsigned long) a)/L1_CACHE_BYTES) & (ATOMIC_HASH_SIZE-1) ]))
extern raw_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned;
extern arch_spinlock_t __atomic_hash[ATOMIC_HASH_SIZE] __lock_aligned;
/* Can't use raw_spin_lock_irq because of #include problems, so
* this is the substitute */
#define _atomic_spin_lock_irqsave(l,f) do { \
raw_spinlock_t *s = ATOMIC_HASH(l); \
arch_spinlock_t *s = ATOMIC_HASH(l); \
local_irq_save(f); \
__raw_spin_lock(s); \
arch_spin_lock(s); \
} while(0)
#define _atomic_spin_unlock_irqrestore(l,f) do { \
raw_spinlock_t *s = ATOMIC_HASH(l); \
__raw_spin_unlock(s); \
arch_spinlock_t *s = ATOMIC_HASH(l); \
arch_spin_unlock(s); \
local_irq_restore(f); \
} while(0)
include/linux/hrtimer.h
+1 -1
View File
@@ -169,7 +169,7 @@ struct hrtimer_clock_base {
* @max_hang_time: Maximum time spent in hrtimer_interrupt
*/
struct hrtimer_cpu_base {
spinlock_t lock;
raw_spinlock_t lock;
struct hrtimer_clock_base clock_base[HRTIMER_MAX_CLOCK_BASES];
#ifdef CONFIG_HIGH_RES_TIMERS
ktime_t expires_next;
include/linux/init_task.h
+1 -1
View File
@@ -170,7 +170,7 @@ extern struct cred init_cred;
.alloc_lock = __SPIN_LOCK_UNLOCKED(tsk.alloc_lock), \
.cpu_timers = INIT_CPU_TIMERS(tsk.cpu_timers), \
.fs_excl = ATOMIC_INIT(0), \
.pi_lock = __SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
.pi_lock = __RAW_SPIN_LOCK_UNLOCKED(tsk.pi_lock), \
.timer_slack_ns = 50000, /* 50 usec default slack */ \
.pids = { \
[PIDTYPE_PID] = INIT_PID_LINK(PIDTYPE_PID), \
include/linux/irq.h
+1 -1
View File
@@ -192,7 +192,7 @@ struct irq_desc {
unsigned int irq_count; /* For detecting broken IRQs */
unsigned long last_unhandled; /* Aging timer for unhandled count */
unsigned int irqs_unhandled;
spinlock_t lock;
raw_spinlock_t lock;
#ifdef CONFIG_SMP
cpumask_var_t affinity;
unsigned int node;
include/linux/perf_event.h
+1 -1
View File
@@ -681,7 +681,7 @@ struct perf_event_context {
* Protect the states of the events in the list,
* nr_active, and the list:
*/
spinlock_t lock;
raw_spinlock_t lock;
/*
* Protect the list of events. Locking either mutex or lock
* is sufficient to ensure the list doesn't change; to change
include/linux/plist.h
+37 -6
View File
@@ -81,7 +81,8 @@ struct plist_head {
struct list_head prio_list;
struct list_head node_list;
#ifdef CONFIG_DEBUG_PI_LIST
spinlock_t *lock;
raw_spinlock_t *rawlock;
spinlock_t *spinlock;
#endif
};
@@ -91,9 +92,11 @@ struct plist_node {
};
#ifdef CONFIG_DEBUG_PI_LIST
# define PLIST_HEAD_LOCK_INIT(_lock) .lock = _lock
# define PLIST_HEAD_LOCK_INIT(_lock) .spinlock = _lock
# define PLIST_HEAD_LOCK_INIT_RAW(_lock) .rawlock = _lock
#else
# define PLIST_HEAD_LOCK_INIT(_lock)
# define PLIST_HEAD_LOCK_INIT_RAW(_lock)
#endif
#define _PLIST_HEAD_INIT(head) \
@@ -107,10 +110,21 @@ struct plist_node {
*/
#define PLIST_HEAD_INIT(head, _lock) \
{ \
_PLIST_HEAD_INIT(head), \
_PLIST_HEAD_INIT(head), \
PLIST_HEAD_LOCK_INIT(&(_lock)) \
}
/**
* PLIST_HEAD_INIT_RAW - static struct plist_head initializer
* @head: struct plist_head variable name
* @_lock: lock to initialize for this list
*/
#define PLIST_HEAD_INIT_RAW(head, _lock) \
{ \
_PLIST_HEAD_INIT(head), \
PLIST_HEAD_LOCK_INIT_RAW(&(_lock)) \
}
/**
* PLIST_NODE_INIT - static struct plist_node initializer
* @node: struct plist_node variable name
@@ -119,13 +133,13 @@ struct plist_node {
#define PLIST_NODE_INIT(node, __prio) \
{ \
.prio = (__prio), \
.plist = { _PLIST_HEAD_INIT((node).plist) }, \
.plist = { _PLIST_HEAD_INIT((node).plist) }, \
}
/**
* plist_head_init - dynamic struct plist_head initializer
* @head: &struct plist_head pointer
* @lock: list spinlock, remembered for debugging
* @lock: spinlock protecting the list (debugging)
*/
static inline void
plist_head_init(struct plist_head *head, spinlock_t *lock)
@@ -133,7 +147,24 @@ plist_head_init(struct plist_head *head, spinlock_t *lock)
INIT_LIST_HEAD(&head->prio_list);
INIT_LIST_HEAD(&head->node_list);
#ifdef CONFIG_DEBUG_PI_LIST
head->lock = lock;
head->spinlock = lock;
head->rawlock = NULL;
#endif
}
/**
* plist_head_init_raw - dynamic struct plist_head initializer
* @head: &struct plist_head pointer
* @lock: raw_spinlock protecting the list (debugging)
*/
static inline void
plist_head_init_raw(struct plist_head *head, raw_spinlock_t *lock)
{
INIT_LIST_HEAD(&head->prio_list);
INIT_LIST_HEAD(&head->node_list);
#ifdef CONFIG_DEBUG_PI_LIST
head->rawlock = lock;
head->spinlock = NULL;
#endif
}
include/linux/rtmutex.h
+3 -3
View File
@@ -24,7 +24,7 @@
* @owner: the mutex owner
*/
struct rt_mutex {
spinlock_t wait_lock;
raw_spinlock_t wait_lock;
struct plist_head wait_list;
struct task_struct *owner;
#ifdef CONFIG_DEBUG_RT_MUTEXES
@@ -63,8 +63,8 @@ struct hrtimer_sleeper;
#endif
#define __RT_MUTEX_INITIALIZER(mutexname) \
{ .wait_lock = __SPIN_LOCK_UNLOCKED(mutexname.wait_lock) \
, .wait_list = PLIST_HEAD_INIT(mutexname.wait_list, mutexname.wait_lock) \
{ .wait_lock = __RAW_SPIN_LOCK_UNLOCKED(mutexname.wait_lock) \
, .wait_list = PLIST_HEAD_INIT_RAW(mutexname.wait_list, mutexname.wait_lock) \
, .owner = NULL \
__DEBUG_RT_MUTEX_INITIALIZER(mutexname)}
include/linux/rwlock.h
+125
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@@ -0,0 +1,125 @@
#ifndef __LINUX_RWLOCK_H
#define __LINUX_RWLOCK_H
#ifndef __LINUX_SPINLOCK_H
# error "please don't include this file directly"
#endif
/*
* rwlock related methods
*
* split out from spinlock.h
*
* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
* Released under the General Public License (GPL).
*/
#ifdef CONFIG_DEBUG_SPINLOCK
extern void __rwlock_init(rwlock_t *lock, const char *name,
struct lock_class_key *key);
# define rwlock_init(lock) \
do { \
static struct lock_class_key __key; \
\
__rwlock_init((lock), #lock, &__key); \
} while (0)
#else
# define rwlock_init(lock) \
do { *(lock) = __RW_LOCK_UNLOCKED(lock); } while (0)
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
extern void do_raw_read_lock(rwlock_t *lock);
#define do_raw_read_lock_flags(lock, flags) do_raw_read_lock(lock)
extern int do_raw_read_trylock(rwlock_t *lock);
extern void do_raw_read_unlock(rwlock_t *lock);
extern void do_raw_write_lock(rwlock_t *lock);
#define do_raw_write_lock_flags(lock, flags) do_raw_write_lock(lock)
extern int do_raw_write_trylock(rwlock_t *lock);
extern void do_raw_write_unlock(rwlock_t *lock);
#else
# define do_raw_read_lock(rwlock) arch_read_lock(&(rwlock)->raw_lock)
# define do_raw_read_lock_flags(lock, flags) \
arch_read_lock_flags(&(lock)->raw_lock, *(flags))
# define do_raw_read_trylock(rwlock) arch_read_trylock(&(rwlock)->raw_lock)
# define do_raw_read_unlock(rwlock) arch_read_unlock(&(rwlock)->raw_lock)
# define do_raw_write_lock(rwlock) arch_write_lock(&(rwlock)->raw_lock)
# define do_raw_write_lock_flags(lock, flags) \
arch_write_lock_flags(&(lock)->raw_lock, *(flags))
# define do_raw_write_trylock(rwlock) arch_write_trylock(&(rwlock)->raw_lock)
# define do_raw_write_unlock(rwlock) arch_write_unlock(&(rwlock)->raw_lock)
#endif
#define read_can_lock(rwlock) arch_read_can_lock(&(rwlock)->raw_lock)
#define write_can_lock(rwlock) arch_write_can_lock(&(rwlock)->raw_lock)
/*
* Define the various rw_lock methods. Note we define these
* regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various
* methods are defined as nops in the case they are not required.
*/
#define read_trylock(lock) __cond_lock(lock, _raw_read_trylock(lock))
#define write_trylock(lock) __cond_lock(lock, _raw_write_trylock(lock))
#define write_lock(lock) _raw_write_lock(lock)
#define read_lock(lock) _raw_read_lock(lock)
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
#define read_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
flags = _raw_read_lock_irqsave(lock); \
} while (0)
#define write_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
flags = _raw_write_lock_irqsave(lock); \
} while (0)
#else
#define read_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_raw_read_lock_irqsave(lock, flags); \
} while (0)
#define write_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_raw_write_lock_irqsave(lock, flags); \
} while (0)
#endif
#define read_lock_irq(lock) _raw_read_lock_irq(lock)
#define read_lock_bh(lock) _raw_read_lock_bh(lock)
#define write_lock_irq(lock) _raw_write_lock_irq(lock)
#define write_lock_bh(lock) _raw_write_lock_bh(lock)
#define read_unlock(lock) _raw_read_unlock(lock)
#define write_unlock(lock) _raw_write_unlock(lock)
#define read_unlock_irq(lock) _raw_read_unlock_irq(lock)
#define write_unlock_irq(lock) _raw_write_unlock_irq(lock)
#define read_unlock_irqrestore(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_raw_read_unlock_irqrestore(lock, flags); \
} while (0)
#define read_unlock_bh(lock) _raw_read_unlock_bh(lock)
#define write_unlock_irqrestore(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_raw_write_unlock_irqrestore(lock, flags); \
} while (0)
#define write_unlock_bh(lock) _raw_write_unlock_bh(lock)
#define write_trylock_irqsave(lock, flags) \
({ \
local_irq_save(flags); \
write_trylock(lock) ? \
1 : ({ local_irq_restore(flags); 0; }); \
})
#endif /* __LINUX_RWLOCK_H */
include/linux/rwlock_api_smp.h
+282
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@@ -0,0 +1,282 @@
#ifndef __LINUX_RWLOCK_API_SMP_H
#define __LINUX_RWLOCK_API_SMP_H
#ifndef __LINUX_SPINLOCK_API_SMP_H
# error "please don't include this file directly"
#endif
/*
* include/linux/rwlock_api_smp.h
*
* spinlock API declarations on SMP (and debug)
* (implemented in kernel/spinlock.c)
*
* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
* Released under the General Public License (GPL).
*/
void __lockfunc _raw_read_lock(rwlock_t *lock) __acquires(lock);
void __lockfunc _raw_write_lock(rwlock_t *lock) __acquires(lock);
void __lockfunc _raw_read_lock_bh(rwlock_t *lock) __acquires(lock);
void __lockfunc _raw_write_lock_bh(rwlock_t *lock) __acquires(lock);
void __lockfunc _raw_read_lock_irq(rwlock_t *lock) __acquires(lock);
void __lockfunc _raw_write_lock_irq(rwlock_t *lock) __acquires(lock);
unsigned long __lockfunc _raw_read_lock_irqsave(rwlock_t *lock)
__acquires(lock);
unsigned long __lockfunc _raw_write_lock_irqsave(rwlock_t *lock)
__acquires(lock);
int __lockfunc _raw_read_trylock(rwlock_t *lock);
int __lockfunc _raw_write_trylock(rwlock_t *lock);
void __lockfunc _raw_read_unlock(rwlock_t *lock) __releases(lock);
void __lockfunc _raw_write_unlock(rwlock_t *lock) __releases(lock);
void __lockfunc _raw_read_unlock_bh(rwlock_t *lock) __releases(lock);
void __lockfunc _raw_write_unlock_bh(rwlock_t *lock) __releases(lock);
void __lockfunc _raw_read_unlock_irq(rwlock_t *lock) __releases(lock);
void __lockfunc _raw_write_unlock_irq(rwlock_t *lock) __releases(lock);
void __lockfunc
_raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
__releases(lock);
void __lockfunc
_raw_write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
__releases(lock);
#ifdef CONFIG_INLINE_READ_LOCK
#define _raw_read_lock(lock) __raw_read_lock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK
#define _raw_write_lock(lock) __raw_write_lock(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_BH
#define _raw_read_lock_bh(lock) __raw_read_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_BH
#define _raw_write_lock_bh(lock) __raw_write_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_IRQ
#define _raw_read_lock_irq(lock) __raw_read_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_IRQ
#define _raw_write_lock_irq(lock) __raw_write_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_IRQSAVE
#define _raw_read_lock_irqsave(lock) __raw_read_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
#define _raw_write_lock_irqsave(lock) __raw_write_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_READ_TRYLOCK
#define _raw_read_trylock(lock) __raw_read_trylock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_TRYLOCK
#define _raw_write_trylock(lock) __raw_write_trylock(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK
#define _raw_read_unlock(lock) __raw_read_unlock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK
#define _raw_write_unlock(lock) __raw_write_unlock(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_BH
#define _raw_read_unlock_bh(lock) __raw_read_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_BH
#define _raw_write_unlock_bh(lock) __raw_write_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_IRQ
#define _raw_read_unlock_irq(lock) __raw_read_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQ
#define _raw_write_unlock_irq(lock) __raw_write_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
#define _raw_read_unlock_irqrestore(lock, flags) \
__raw_read_unlock_irqrestore(lock, flags)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
#define _raw_write_unlock_irqrestore(lock, flags) \
__raw_write_unlock_irqrestore(lock, flags)
#endif
static inline int __raw_read_trylock(rwlock_t *lock)
{
preempt_disable();
if (do_raw_read_trylock(lock)) {
rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_);
return 1;
}
preempt_enable();
return 0;
}
static inline int __raw_write_trylock(rwlock_t *lock)
{
preempt_disable();
if (do_raw_write_trylock(lock)) {
rwlock_acquire(&lock->dep_map, 0, 1, _RET_IP_);
return 1;
}
preempt_enable();
return 0;
}
/*
* If lockdep is enabled then we use the non-preemption spin-ops
* even on CONFIG_PREEMPT, because lockdep assumes that interrupts are
* not re-enabled during lock-acquire (which the preempt-spin-ops do):
*/
#if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
static inline void __raw_read_lock(rwlock_t *lock)
{
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, do_raw_read_trylock, do_raw_read_lock);
}
static inline unsigned long __raw_read_lock_irqsave(rwlock_t *lock)
{
unsigned long flags;
local_irq_save(flags);
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED_FLAGS(lock, do_raw_read_trylock, do_raw_read_lock,
do_raw_read_lock_flags, &flags);
return flags;
}
static inline void __raw_read_lock_irq(rwlock_t *lock)
{
local_irq_disable();
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, do_raw_read_trylock, do_raw_read_lock);
}
static inline void __raw_read_lock_bh(rwlock_t *lock)
{
local_bh_disable();
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, do_raw_read_trylock, do_raw_read_lock);
}
static inline unsigned long __raw_write_lock_irqsave(rwlock_t *lock)
{
unsigned long flags;
local_irq_save(flags);
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED_FLAGS(lock, do_raw_write_trylock, do_raw_write_lock,
do_raw_write_lock_flags, &flags);
return flags;
}
static inline void __raw_write_lock_irq(rwlock_t *lock)
{
local_irq_disable();
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, do_raw_write_trylock, do_raw_write_lock);
}
static inline void __raw_write_lock_bh(rwlock_t *lock)
{
local_bh_disable();
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, do_raw_write_trylock, do_raw_write_lock);
}
static inline void __raw_write_lock(rwlock_t *lock)
{
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, do_raw_write_trylock, do_raw_write_lock);
}
#endif /* CONFIG_PREEMPT */
static inline void __raw_write_unlock(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
do_raw_write_unlock(lock);
preempt_enable();
}
static inline void __raw_read_unlock(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
do_raw_read_unlock(lock);
preempt_enable();
}
static inline void
__raw_read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
do_raw_read_unlock(lock);
local_irq_restore(flags);
preempt_enable();
}
static inline void __raw_read_unlock_irq(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
do_raw_read_unlock(lock);
local_irq_enable();
preempt_enable();
}
static inline void __raw_read_unlock_bh(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
do_raw_read_unlock(lock);
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
static inline void __raw_write_unlock_irqrestore(rwlock_t *lock,
unsigned long flags)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
do_raw_write_unlock(lock);
local_irq_restore(flags);
preempt_enable();
}
static inline void __raw_write_unlock_irq(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
do_raw_write_unlock(lock);
local_irq_enable();
preempt_enable();
}
static inline void __raw_write_unlock_bh(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
do_raw_write_unlock(lock);
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
#endif /* __LINUX_RWLOCK_API_SMP_H */
include/linux/rwlock_types.h
+56
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@@ -0,0 +1,56 @@
#ifndef __LINUX_RWLOCK_TYPES_H
#define __LINUX_RWLOCK_TYPES_H
/*
* include/linux/rwlock_types.h - generic rwlock type definitions
* and initializers
*
* portions Copyright 2005, Red Hat, Inc., Ingo Molnar
* Released under the General Public License (GPL).
*/
typedef struct {
arch_rwlock_t raw_lock;
#ifdef CONFIG_GENERIC_LOCKBREAK
unsigned int break_lock;
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
unsigned int magic, owner_cpu;
void *owner;
#endif
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lockdep_map dep_map;
#endif
} rwlock_t;
#define RWLOCK_MAGIC 0xdeaf1eed
#ifdef CONFIG_DEBUG_LOCK_ALLOC
# define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
#else
# define RW_DEP_MAP_INIT(lockname)
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
#define __RW_LOCK_UNLOCKED(lockname) \
(rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \
.magic = RWLOCK_MAGIC, \
.owner = SPINLOCK_OWNER_INIT, \
.owner_cpu = -1, \
RW_DEP_MAP_INIT(lockname) }
#else
#define __RW_LOCK_UNLOCKED(lockname) \
(rwlock_t) { .raw_lock = __ARCH_RW_LOCK_UNLOCKED, \
RW_DEP_MAP_INIT(lockname) }
#endif
/*
* RW_LOCK_UNLOCKED defeat lockdep state tracking and is hence
* deprecated.
*
* Please use DEFINE_RWLOCK() or __RW_LOCK_UNLOCKED() as appropriate.
*/
#define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init)
#define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x)
#endif /* __LINUX_RWLOCK_TYPES_H */
include/linux/sched.h
+1 -1
View File
@@ -1409,7 +1409,7 @@ struct task_struct {
#endif
/* Protection of the PI data structures: */
spinlock_t pi_lock;
raw_spinlock_t pi_lock;
#ifdef CONFIG_RT_MUTEXES
/* PI waiters blocked on a rt_mutex held by this task */
include/linux/spinlock.h
+213 -164
View File
@@ -8,13 +8,13 @@
*
* on SMP builds:
*
* asm/spinlock_types.h: contains the raw_spinlock_t/raw_rwlock_t and the
* asm/spinlock_types.h: contains the arch_spinlock_t/arch_rwlock_t and the
* initializers
*
* linux/spinlock_types.h:
* defines the generic type and initializers
*
* asm/spinlock.h: contains the __raw_spin_*()/etc. lowlevel
* asm/spinlock.h: contains the arch_spin_*()/etc. lowlevel
* implementations, mostly inline assembly code
*
* (also included on UP-debug builds:)
@@ -34,7 +34,7 @@
* defines the generic type and initializers
*
* linux/spinlock_up.h:
* contains the __raw_spin_*()/etc. version of UP
* contains the arch_spin_*()/etc. version of UP
* builds. (which are NOPs on non-debug, non-preempt
* builds)
*
@@ -75,12 +75,12 @@
#define __lockfunc __attribute__((section(".spinlock.text")))
/*
* Pull the raw_spinlock_t and raw_rwlock_t definitions:
* Pull the arch_spinlock_t and arch_rwlock_t definitions:
*/
#include <linux/spinlock_types.h>
/*
* Pull the __raw*() functions/declarations (UP-nondebug doesnt need them):
* Pull the arch_spin*() functions/declarations (UP-nondebug doesnt need them):
*/
#ifdef CONFIG_SMP
# include <asm/spinlock.h>
@@ -89,45 +89,31 @@
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
extern void __spin_lock_init(spinlock_t *lock, const char *name,
struct lock_class_key *key);
# define spin_lock_init(lock) \
extern void __raw_spin_lock_init(raw_spinlock_t *lock, const char *name,
struct lock_class_key *key);
# define raw_spin_lock_init(lock) \
do { \
static struct lock_class_key __key; \
\
__spin_lock_init((lock), #lock, &__key); \
__raw_spin_lock_init((lock), #lock, &__key); \
} while (0)
#else
# define spin_lock_init(lock) \
do { *(lock) = __SPIN_LOCK_UNLOCKED(lock); } while (0)
# define raw_spin_lock_init(lock) \
do { *(lock) = __RAW_SPIN_LOCK_UNLOCKED(lock); } while (0)
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
extern void __rwlock_init(rwlock_t *lock, const char *name,
struct lock_class_key *key);
# define rwlock_init(lock) \
do { \
static struct lock_class_key __key; \
\
__rwlock_init((lock), #lock, &__key); \
} while (0)
#else
# define rwlock_init(lock) \
do { *(lock) = __RW_LOCK_UNLOCKED(lock); } while (0)
#endif
#define spin_is_locked(lock) __raw_spin_is_locked(&(lock)->raw_lock)
#define raw_spin_is_locked(lock) arch_spin_is_locked(&(lock)->raw_lock)
#ifdef CONFIG_GENERIC_LOCKBREAK
#define spin_is_contended(lock) ((lock)->break_lock)
#define raw_spin_is_contended(lock) ((lock)->break_lock)
#else
#ifdef __raw_spin_is_contended
#define spin_is_contended(lock) __raw_spin_is_contended(&(lock)->raw_lock)
#ifdef arch_spin_is_contended
#define raw_spin_is_contended(lock) arch_spin_is_contended(&(lock)->raw_lock)
#else
#define spin_is_contended(lock) (((void)(lock), 0))
#endif /*__raw_spin_is_contended*/
#define raw_spin_is_contended(lock) (((void)(lock), 0))
#endif /*arch_spin_is_contended*/
#endif
/* The lock does not imply full memory barrier. */
@@ -136,182 +122,260 @@ static inline void smp_mb__after_lock(void) { smp_mb(); }
#endif
/**
* spin_unlock_wait - wait until the spinlock gets unlocked
* raw_spin_unlock_wait - wait until the spinlock gets unlocked
* @lock: the spinlock in question.
*/
#define spin_unlock_wait(lock) __raw_spin_unlock_wait(&(lock)->raw_lock)
#define raw_spin_unlock_wait(lock) arch_spin_unlock_wait(&(lock)->raw_lock)
#ifdef CONFIG_DEBUG_SPINLOCK
extern void _raw_spin_lock(spinlock_t *lock);
#define _raw_spin_lock_flags(lock, flags) _raw_spin_lock(lock)
extern int _raw_spin_trylock(spinlock_t *lock);
extern void _raw_spin_unlock(spinlock_t *lock);
extern void _raw_read_lock(rwlock_t *lock);
#define _raw_read_lock_flags(lock, flags) _raw_read_lock(lock)
extern int _raw_read_trylock(rwlock_t *lock);
extern void _raw_read_unlock(rwlock_t *lock);
extern void _raw_write_lock(rwlock_t *lock);
#define _raw_write_lock_flags(lock, flags) _raw_write_lock(lock)
extern int _raw_write_trylock(rwlock_t *lock);
extern void _raw_write_unlock(rwlock_t *lock);
extern void do_raw_spin_lock(raw_spinlock_t *lock);
#define do_raw_spin_lock_flags(lock, flags) do_raw_spin_lock(lock)
extern int do_raw_spin_trylock(raw_spinlock_t *lock);
extern void do_raw_spin_unlock(raw_spinlock_t *lock);
#else
# define _raw_spin_lock(lock) __raw_spin_lock(&(lock)->raw_lock)
# define _raw_spin_lock_flags(lock, flags) \
__raw_spin_lock_flags(&(lock)->raw_lock, *(flags))
# define _raw_spin_trylock(lock) __raw_spin_trylock(&(lock)->raw_lock)
# define _raw_spin_unlock(lock) __raw_spin_unlock(&(lock)->raw_lock)
# define _raw_read_lock(rwlock) __raw_read_lock(&(rwlock)->raw_lock)
# define _raw_read_lock_flags(lock, flags) \
__raw_read_lock_flags(&(lock)->raw_lock, *(flags))
# define _raw_read_trylock(rwlock) __raw_read_trylock(&(rwlock)->raw_lock)
# define _raw_read_unlock(rwlock) __raw_read_unlock(&(rwlock)->raw_lock)
# define _raw_write_lock(rwlock) __raw_write_lock(&(rwlock)->raw_lock)
# define _raw_write_lock_flags(lock, flags) \
__raw_write_lock_flags(&(lock)->raw_lock, *(flags))
# define _raw_write_trylock(rwlock) __raw_write_trylock(&(rwlock)->raw_lock)
# define _raw_write_unlock(rwlock) __raw_write_unlock(&(rwlock)->raw_lock)
#endif
static inline void do_raw_spin_lock(raw_spinlock_t *lock)
{
arch_spin_lock(&lock->raw_lock);
}
#define read_can_lock(rwlock) __raw_read_can_lock(&(rwlock)->raw_lock)
#define write_can_lock(rwlock) __raw_write_can_lock(&(rwlock)->raw_lock)
static inline void
do_raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long *flags)
{
arch_spin_lock_flags(&lock->raw_lock, *flags);
}
static inline int do_raw_spin_trylock(raw_spinlock_t *lock)
{
return arch_spin_trylock(&(lock)->raw_lock);
}
static inline void do_raw_spin_unlock(raw_spinlock_t *lock)
{
arch_spin_unlock(&lock->raw_lock);
}
#endif
/*
* Define the various spin_lock and rw_lock methods. Note we define these
* regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The various
* methods are defined as nops in the case they are not required.
* Define the various spin_lock methods. Note we define these
* regardless of whether CONFIG_SMP or CONFIG_PREEMPT are set. The
* various methods are defined as nops in the case they are not
* required.
*/
#define spin_trylock(lock) __cond_lock(lock, _spin_trylock(lock))
#define read_trylock(lock) __cond_lock(lock, _read_trylock(lock))
#define write_trylock(lock) __cond_lock(lock, _write_trylock(lock))
#define raw_spin_trylock(lock) __cond_lock(lock, _raw_spin_trylock(lock))
#define spin_lock(lock) _spin_lock(lock)
#define raw_spin_lock(lock) _raw_spin_lock(lock)
#ifdef CONFIG_DEBUG_LOCK_ALLOC
# define spin_lock_nested(lock, subclass) _spin_lock_nested(lock, subclass)
# define spin_lock_nest_lock(lock, nest_lock) \
# define raw_spin_lock_nested(lock, subclass) \
_raw_spin_lock_nested(lock, subclass)
# define raw_spin_lock_nest_lock(lock, nest_lock) \
do { \
typecheck(struct lockdep_map *, &(nest_lock)->dep_map);\
_spin_lock_nest_lock(lock, &(nest_lock)->dep_map); \
_raw_spin_lock_nest_lock(lock, &(nest_lock)->dep_map); \
} while (0)
#else
# define spin_lock_nested(lock, subclass) _spin_lock(lock)
# define spin_lock_nest_lock(lock, nest_lock) _spin_lock(lock)
# define raw_spin_lock_nested(lock, subclass) _raw_spin_lock(lock)
# define raw_spin_lock_nest_lock(lock, nest_lock) _raw_spin_lock(lock)
#endif
#define write_lock(lock) _write_lock(lock)
#define read_lock(lock) _read_lock(lock)
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
#define spin_lock_irqsave(lock, flags) \
#define raw_spin_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
flags = _spin_lock_irqsave(lock); \
} while (0)
#define read_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
flags = _read_lock_irqsave(lock); \
} while (0)
#define write_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
flags = _write_lock_irqsave(lock); \
flags = _raw_spin_lock_irqsave(lock); \
} while (0)
#ifdef CONFIG_DEBUG_LOCK_ALLOC
#define spin_lock_irqsave_nested(lock, flags, subclass) \
#define raw_spin_lock_irqsave_nested(lock, flags, subclass) \
do { \
typecheck(unsigned long, flags); \
flags = _spin_lock_irqsave_nested(lock, subclass); \
flags = _raw_spin_lock_irqsave_nested(lock, subclass); \
} while (0)
#else
#define spin_lock_irqsave_nested(lock, flags, subclass) \
#define raw_spin_lock_irqsave_nested(lock, flags, subclass) \
do { \
typecheck(unsigned long, flags); \
flags = _spin_lock_irqsave(lock); \
flags = _raw_spin_lock_irqsave(lock); \
} while (0)
#endif
#else
#define spin_lock_irqsave(lock, flags) \
#define raw_spin_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_spin_lock_irqsave(lock, flags); \
_raw_spin_lock_irqsave(lock, flags); \
} while (0)
#define read_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_read_lock_irqsave(lock, flags); \
} while (0)
#define write_lock_irqsave(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_write_lock_irqsave(lock, flags); \
} while (0)
#define spin_lock_irqsave_nested(lock, flags, subclass) \
spin_lock_irqsave(lock, flags)
#define raw_spin_lock_irqsave_nested(lock, flags, subclass) \
raw_spin_lock_irqsave(lock, flags)
#endif
#define spin_lock_irq(lock) _spin_lock_irq(lock)
#define spin_lock_bh(lock) _spin_lock_bh(lock)
#define read_lock_irq(lock) _read_lock_irq(lock)
#define read_lock_bh(lock) _read_lock_bh(lock)
#define write_lock_irq(lock) _write_lock_irq(lock)
#define write_lock_bh(lock) _write_lock_bh(lock)
#define spin_unlock(lock) _spin_unlock(lock)
#define read_unlock(lock) _read_unlock(lock)
#define write_unlock(lock) _write_unlock(lock)
#define spin_unlock_irq(lock) _spin_unlock_irq(lock)
#define read_unlock_irq(lock) _read_unlock_irq(lock)
#define write_unlock_irq(lock) _write_unlock_irq(lock)
#define raw_spin_lock_irq(lock) _raw_spin_lock_irq(lock)
#define raw_spin_lock_bh(lock) _raw_spin_lock_bh(lock)
#define raw_spin_unlock(lock) _raw_spin_unlock(lock)
#define raw_spin_unlock_irq(lock) _raw_spin_unlock_irq(lock)
#define spin_unlock_irqrestore(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_spin_unlock_irqrestore(lock, flags); \
#define raw_spin_unlock_irqrestore(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_raw_spin_unlock_irqrestore(lock, flags); \
} while (0)
#define spin_unlock_bh(lock) _spin_unlock_bh(lock)
#define raw_spin_unlock_bh(lock) _raw_spin_unlock_bh(lock)
#define read_unlock_irqrestore(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_read_unlock_irqrestore(lock, flags); \
} while (0)
#define read_unlock_bh(lock) _read_unlock_bh(lock)
#define raw_spin_trylock_bh(lock) \
__cond_lock(lock, _raw_spin_trylock_bh(lock))
#define write_unlock_irqrestore(lock, flags) \
do { \
typecheck(unsigned long, flags); \
_write_unlock_irqrestore(lock, flags); \
} while (0)
#define write_unlock_bh(lock) _write_unlock_bh(lock)
#define spin_trylock_bh(lock) __cond_lock(lock, _spin_trylock_bh(lock))
#define spin_trylock_irq(lock) \
#define raw_spin_trylock_irq(lock) \
({ \
local_irq_disable(); \
spin_trylock(lock) ? \
raw_spin_trylock(lock) ? \
1 : ({ local_irq_enable(); 0; }); \
})
#define spin_trylock_irqsave(lock, flags) \
#define raw_spin_trylock_irqsave(lock, flags) \
({ \
local_irq_save(flags); \
spin_trylock(lock) ? \
raw_spin_trylock(lock) ? \
1 : ({ local_irq_restore(flags); 0; }); \
})
#define write_trylock_irqsave(lock, flags) \
({ \
local_irq_save(flags); \
write_trylock(lock) ? \
1 : ({ local_irq_restore(flags); 0; }); \
/**
* raw_spin_can_lock - would raw_spin_trylock() succeed?
* @lock: the spinlock in question.
*/
#define raw_spin_can_lock(lock) (!raw_spin_is_locked(lock))
/* Include rwlock functions */
#include <linux/rwlock.h>
/*
* Pull the _spin_*()/_read_*()/_write_*() functions/declarations:
*/
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
# include <linux/spinlock_api_smp.h>
#else
# include <linux/spinlock_api_up.h>
#endif
/*
* Map the spin_lock functions to the raw variants for PREEMPT_RT=n
*/
static inline raw_spinlock_t *spinlock_check(spinlock_t *lock)
{
return &lock->rlock;
}
#define spin_lock_init(_lock) \
do { \
spinlock_check(_lock); \
raw_spin_lock_init(&(_lock)->rlock); \
} while (0)
static inline void spin_lock(spinlock_t *lock)
{
raw_spin_lock(&lock->rlock);
}
static inline void spin_lock_bh(spinlock_t *lock)
{
raw_spin_lock_bh(&lock->rlock);
}
static inline int spin_trylock(spinlock_t *lock)
{
return raw_spin_trylock(&lock->rlock);
}
#define spin_lock_nested(lock, subclass) \
do { \
raw_spin_lock_nested(spinlock_check(lock), subclass); \
} while (0)
#define spin_lock_nest_lock(lock, nest_lock) \
do { \
raw_spin_lock_nest_lock(spinlock_check(lock), nest_lock); \
} while (0)
static inline void spin_lock_irq(spinlock_t *lock)
{
raw_spin_lock_irq(&lock->rlock);
}
#define spin_lock_irqsave(lock, flags) \
do { \
raw_spin_lock_irqsave(spinlock_check(lock), flags); \
} while (0)
#define spin_lock_irqsave_nested(lock, flags, subclass) \
do { \
raw_spin_lock_irqsave_nested(spinlock_check(lock), flags, subclass); \
} while (0)
static inline void spin_unlock(spinlock_t *lock)
{
raw_spin_unlock(&lock->rlock);
}
static inline void spin_unlock_bh(spinlock_t *lock)
{
raw_spin_unlock_bh(&lock->rlock);
}
static inline void spin_unlock_irq(spinlock_t *lock)
{
raw_spin_unlock_irq(&lock->rlock);
}
static inline void spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
{
raw_spin_unlock_irqrestore(&lock->rlock, flags);
}
static inline int spin_trylock_bh(spinlock_t *lock)
{
return raw_spin_trylock_bh(&lock->rlock);
}
static inline int spin_trylock_irq(spinlock_t *lock)
{
return raw_spin_trylock_irq(&lock->rlock);
}
#define spin_trylock_irqsave(lock, flags) \
({ \
raw_spin_trylock_irqsave(spinlock_check(lock), flags); \
})
static inline void spin_unlock_wait(spinlock_t *lock)
{
raw_spin_unlock_wait(&lock->rlock);
}
static inline int spin_is_locked(spinlock_t *lock)
{
return raw_spin_is_locked(&lock->rlock);
}
static inline int spin_is_contended(spinlock_t *lock)
{
return raw_spin_is_contended(&lock->rlock);
}
static inline int spin_can_lock(spinlock_t *lock)
{
return raw_spin_can_lock(&lock->rlock);
}
static inline void assert_spin_locked(spinlock_t *lock)
{
assert_raw_spin_locked(&lock->rlock);
}
/*
* Pull the atomic_t declaration:
* (asm-mips/atomic.h needs above definitions)
@@ -329,19 +393,4 @@ extern int _atomic_dec_and_lock(atomic_t *atomic, spinlock_t *lock);
#define atomic_dec_and_lock(atomic, lock) \
__cond_lock(lock, _atomic_dec_and_lock(atomic, lock))
/**
* spin_can_lock - would spin_trylock() succeed?
* @lock: the spinlock in question.
*/
#define spin_can_lock(lock) (!spin_is_locked(lock))
/*
* Pull the _spin_*()/_read_*()/_write_*() functions/declarations:
*/
#if defined(CONFIG_SMP) || defined(CONFIG_DEBUG_SPINLOCK)
# include <linux/spinlock_api_smp.h>
#else
# include <linux/spinlock_api_up.h>
#endif
#endif /* __LINUX_SPINLOCK_H */
include/linux/spinlock_api_smp.h
+58 -300
View File
@@ -17,165 +17,76 @@
int in_lock_functions(unsigned long addr);
#define assert_spin_locked(x) BUG_ON(!spin_is_locked(x))
#define assert_raw_spin_locked(x) BUG_ON(!raw_spin_is_locked(x))
void __lockfunc _spin_lock(spinlock_t *lock) __acquires(lock);
void __lockfunc _spin_lock_nested(spinlock_t *lock, int subclass)
__acquires(lock);
void __lockfunc _spin_lock_nest_lock(spinlock_t *lock, struct lockdep_map *map)
__acquires(lock);
void __lockfunc _read_lock(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock(rwlock_t *lock) __acquires(lock);
void __lockfunc _spin_lock_bh(spinlock_t *lock) __acquires(lock);
void __lockfunc _read_lock_bh(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock_bh(rwlock_t *lock) __acquires(lock);
void __lockfunc _spin_lock_irq(spinlock_t *lock) __acquires(lock);
void __lockfunc _read_lock_irq(rwlock_t *lock) __acquires(lock);
void __lockfunc _write_lock_irq(rwlock_t *lock) __acquires(lock);
unsigned long __lockfunc _spin_lock_irqsave(spinlock_t *lock)
__acquires(lock);
unsigned long __lockfunc _spin_lock_irqsave_nested(spinlock_t *lock, int subclass)
__acquires(lock);
unsigned long __lockfunc _read_lock_irqsave(rwlock_t *lock)
__acquires(lock);
unsigned long __lockfunc _write_lock_irqsave(rwlock_t *lock)
__acquires(lock);
int __lockfunc _spin_trylock(spinlock_t *lock);
int __lockfunc _read_trylock(rwlock_t *lock);
int __lockfunc _write_trylock(rwlock_t *lock);
int __lockfunc _spin_trylock_bh(spinlock_t *lock);
void __lockfunc _spin_unlock(spinlock_t *lock) __releases(lock);
void __lockfunc _read_unlock(rwlock_t *lock) __releases(lock);
void __lockfunc _write_unlock(rwlock_t *lock) __releases(lock);
void __lockfunc _spin_unlock_bh(spinlock_t *lock) __releases(lock);
void __lockfunc _read_unlock_bh(rwlock_t *lock) __releases(lock);
void __lockfunc _write_unlock_bh(rwlock_t *lock) __releases(lock);
void __lockfunc _spin_unlock_irq(spinlock_t *lock) __releases(lock);
void __lockfunc _read_unlock_irq(rwlock_t *lock) __releases(lock);
void __lockfunc _write_unlock_irq(rwlock_t *lock) __releases(lock);
void __lockfunc _spin_unlock_irqrestore(spinlock_t *lock, unsigned long flags)
__releases(lock);
void __lockfunc _read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
__releases(lock);
void __lockfunc _write_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
__releases(lock);
void __lockfunc _raw_spin_lock(raw_spinlock_t *lock) __acquires(lock);
void __lockfunc _raw_spin_lock_nested(raw_spinlock_t *lock, int subclass)
__acquires(lock);
void __lockfunc
_raw_spin_lock_nest_lock(raw_spinlock_t *lock, struct lockdep_map *map)
__acquires(lock);
void __lockfunc _raw_spin_lock_bh(raw_spinlock_t *lock) __acquires(lock);
void __lockfunc _raw_spin_lock_irq(raw_spinlock_t *lock)
__acquires(lock);
unsigned long __lockfunc _raw_spin_lock_irqsave(raw_spinlock_t *lock)
__acquires(lock);
unsigned long __lockfunc
_raw_spin_lock_irqsave_nested(raw_spinlock_t *lock, int subclass)
__acquires(lock);
int __lockfunc _raw_spin_trylock(raw_spinlock_t *lock);
int __lockfunc _raw_spin_trylock_bh(raw_spinlock_t *lock);
void __lockfunc _raw_spin_unlock(raw_spinlock_t *lock) __releases(lock);
void __lockfunc _raw_spin_unlock_bh(raw_spinlock_t *lock) __releases(lock);
void __lockfunc _raw_spin_unlock_irq(raw_spinlock_t *lock) __releases(lock);
void __lockfunc
_raw_spin_unlock_irqrestore(raw_spinlock_t *lock, unsigned long flags)
__releases(lock);
#ifdef CONFIG_INLINE_SPIN_LOCK
#define _spin_lock(lock) __spin_lock(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK
#define _read_lock(lock) __read_lock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK
#define _write_lock(lock) __write_lock(lock)
#define _raw_spin_lock(lock) __raw_spin_lock(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_LOCK_BH
#define _spin_lock_bh(lock) __spin_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_BH
#define _read_lock_bh(lock) __read_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_BH
#define _write_lock_bh(lock) __write_lock_bh(lock)
#define _raw_spin_lock_bh(lock) __raw_spin_lock_bh(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_LOCK_IRQ
#define _spin_lock_irq(lock) __spin_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_IRQ
#define _read_lock_irq(lock) __read_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_IRQ
#define _write_lock_irq(lock) __write_lock_irq(lock)
#define _raw_spin_lock_irq(lock) __raw_spin_lock_irq(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_LOCK_IRQSAVE
#define _spin_lock_irqsave(lock) __spin_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_READ_LOCK_IRQSAVE
#define _read_lock_irqsave(lock) __read_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_LOCK_IRQSAVE
#define _write_lock_irqsave(lock) __write_lock_irqsave(lock)
#define _raw_spin_lock_irqsave(lock) __raw_spin_lock_irqsave(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_TRYLOCK
#define _spin_trylock(lock) __spin_trylock(lock)
#endif
#ifdef CONFIG_INLINE_READ_TRYLOCK
#define _read_trylock(lock) __read_trylock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_TRYLOCK
#define _write_trylock(lock) __write_trylock(lock)
#define _raw_spin_trylock(lock) __raw_spin_trylock(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_TRYLOCK_BH
#define _spin_trylock_bh(lock) __spin_trylock_bh(lock)
#define _raw_spin_trylock_bh(lock) __raw_spin_trylock_bh(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK
#define _spin_unlock(lock) __spin_unlock(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK
#define _read_unlock(lock) __read_unlock(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK
#define _write_unlock(lock) __write_unlock(lock)
#define _raw_spin_unlock(lock) __raw_spin_unlock(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK_BH
#define _spin_unlock_bh(lock) __spin_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_BH
#define _read_unlock_bh(lock) __read_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_BH
#define _write_unlock_bh(lock) __write_unlock_bh(lock)
#define _raw_spin_unlock_bh(lock) __raw_spin_unlock_bh(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQ
#define _spin_unlock_irq(lock) __spin_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_IRQ
#define _read_unlock_irq(lock) __read_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQ
#define _write_unlock_irq(lock) __write_unlock_irq(lock)
#define _raw_spin_unlock_irq(lock) __raw_spin_unlock_irq(lock)
#endif
#ifdef CONFIG_INLINE_SPIN_UNLOCK_IRQRESTORE
#define _spin_unlock_irqrestore(lock, flags) __spin_unlock_irqrestore(lock, flags)
#define _raw_spin_unlock_irqrestore(lock, flags) __raw_spin_unlock_irqrestore(lock, flags)
#endif
#ifdef CONFIG_INLINE_READ_UNLOCK_IRQRESTORE
#define _read_unlock_irqrestore(lock, flags) __read_unlock_irqrestore(lock, flags)
#endif
#ifdef CONFIG_INLINE_WRITE_UNLOCK_IRQRESTORE
#define _write_unlock_irqrestore(lock, flags) __write_unlock_irqrestore(lock, flags)
#endif
static inline int __spin_trylock(spinlock_t *lock)
static inline int __raw_spin_trylock(raw_spinlock_t *lock)
{
preempt_disable();
if (_raw_spin_trylock(lock)) {
if (do_raw_spin_trylock(lock)) {
spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
return 1;
}
@@ -183,28 +94,6 @@ static inline int __spin_trylock(spinlock_t *lock)
return 0;
}
static inline int __read_trylock(rwlock_t *lock)
{
preempt_disable();
if (_raw_read_trylock(lock)) {
rwlock_acquire_read(&lock->dep_map, 0, 1, _RET_IP_);
return 1;
}
preempt_enable();
return 0;
}
static inline int __write_trylock(rwlock_t *lock)
{
preempt_disable();
if (_raw_write_trylock(lock)) {
rwlock_acquire(&lock->dep_map, 0, 1, _RET_IP_);
return 1;
}
preempt_enable();
return 0;
}
/*
* If lockdep is enabled then we use the non-preemption spin-ops
* even on CONFIG_PREEMPT, because lockdep assumes that interrupts are
@@ -212,14 +101,7 @@ static inline int __write_trylock(rwlock_t *lock)
*/
#if !defined(CONFIG_GENERIC_LOCKBREAK) || defined(CONFIG_DEBUG_LOCK_ALLOC)
static inline void __read_lock(rwlock_t *lock)
{
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
}
static inline unsigned long __spin_lock_irqsave(spinlock_t *lock)
static inline unsigned long __raw_spin_lock_irqsave(raw_spinlock_t *lock)
{
unsigned long flags;
@@ -228,205 +110,79 @@ static inline unsigned long __spin_lock_irqsave(spinlock_t *lock)
spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
/*
* On lockdep we dont want the hand-coded irq-enable of
* _raw_spin_lock_flags() code, because lockdep assumes
* do_raw_spin_lock_flags() code, because lockdep assumes
* that interrupts are not re-enabled during lock-acquire:
*/
#ifdef CONFIG_LOCKDEP
LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
#else
_raw_spin_lock_flags(lock, &flags);
do_raw_spin_lock_flags(lock, &flags);
#endif
return flags;
}
static inline void __spin_lock_irq(spinlock_t *lock)
static inline void __raw_spin_lock_irq(raw_spinlock_t *lock)
{
local_irq_disable();
preempt_disable();
spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
}
static inline void __spin_lock_bh(spinlock_t *lock)
static inline void __raw_spin_lock_bh(raw_spinlock_t *lock)
{
local_bh_disable();
preempt_disable();
spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
}
static inline unsigned long __read_lock_irqsave(rwlock_t *lock)
{
unsigned long flags;
local_irq_save(flags);
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED_FLAGS(lock, _raw_read_trylock, _raw_read_lock,
_raw_read_lock_flags, &flags);
return flags;
}
static inline void __read_lock_irq(rwlock_t *lock)
{
local_irq_disable();
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
}
static inline void __read_lock_bh(rwlock_t *lock)
{
local_bh_disable();
preempt_disable();
rwlock_acquire_read(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_read_trylock, _raw_read_lock);
}
static inline unsigned long __write_lock_irqsave(rwlock_t *lock)
{
unsigned long flags;
local_irq_save(flags);
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED_FLAGS(lock, _raw_write_trylock, _raw_write_lock,
_raw_write_lock_flags, &flags);
return flags;
}
static inline void __write_lock_irq(rwlock_t *lock)
{
local_irq_disable();
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
}
static inline void __write_lock_bh(rwlock_t *lock)
{
local_bh_disable();
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
}
static inline void __spin_lock(spinlock_t *lock)
static inline void __raw_spin_lock(raw_spinlock_t *lock)
{
preempt_disable();
spin_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_spin_trylock, _raw_spin_lock);
}
static inline void __write_lock(rwlock_t *lock)
{
preempt_disable();
rwlock_acquire(&lock->dep_map, 0, 0, _RET_IP_);
LOCK_CONTENDED(lock, _raw_write_trylock, _raw_write_lock);
LOCK_CONTENDED(lock, do_raw_spin_trylock, do_raw_spin_lock);
}
#endif /* CONFIG_PREEMPT */
static inline void __spin_unlock(spinlock_t *lock)
static inline void __raw_spin_unlock(raw_spinlock_t *lock)
{
spin_release(&lock->dep_map, 1, _RET_IP_);
_raw_spin_unlock(lock);
do_raw_spin_unlock(lock);
preempt_enable();
}
static inline void __write_unlock(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
preempt_enable();
}
static inline void __read_unlock(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
preempt_enable();
}
static inline void __spin_unlock_irqrestore(spinlock_t *lock,
static inline void __raw_spin_unlock_irqrestore(raw_spinlock_t *lock,
unsigned long flags)
{
spin_release(&lock->dep_map, 1, _RET_IP_);
_raw_spin_unlock(lock);
do_raw_spin_unlock(lock);
local_irq_restore(flags);
preempt_enable();
}
static inline void __spin_unlock_irq(spinlock_t *lock)
static inline void __raw_spin_unlock_irq(raw_spinlock_t *lock)
{
spin_release(&lock->dep_map, 1, _RET_IP_);
_raw_spin_unlock(lock);
do_raw_spin_unlock(lock);
local_irq_enable();
preempt_enable();
}
static inline void __spin_unlock_bh(spinlock_t *lock)
static inline void __raw_spin_unlock_bh(raw_spinlock_t *lock)
{
spin_release(&lock->dep_map, 1, _RET_IP_);
_raw_spin_unlock(lock);
do_raw_spin_unlock(lock);
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
static inline void __read_unlock_irqrestore(rwlock_t *lock, unsigned long flags)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
local_irq_restore(flags);
preempt_enable();
}
static inline void __read_unlock_irq(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
local_irq_enable();
preempt_enable();
}
static inline void __read_unlock_bh(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_read_unlock(lock);
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
static inline void __write_unlock_irqrestore(rwlock_t *lock,
unsigned long flags)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
local_irq_restore(flags);
preempt_enable();
}
static inline void __write_unlock_irq(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
local_irq_enable();
preempt_enable();
}
static inline void __write_unlock_bh(rwlock_t *lock)
{
rwlock_release(&lock->dep_map, 1, _RET_IP_);
_raw_write_unlock(lock);
preempt_enable_no_resched();
local_bh_enable_ip((unsigned long)__builtin_return_address(0));
}
static inline int __spin_trylock_bh(spinlock_t *lock)
static inline int __raw_spin_trylock_bh(raw_spinlock_t *lock)
{
local_bh_disable();
preempt_disable();
if (_raw_spin_trylock(lock)) {
if (do_raw_spin_trylock(lock)) {
spin_acquire(&lock->dep_map, 0, 1, _RET_IP_);
return 1;
}
@@ -435,4 +191,6 @@ static inline int __spin_trylock_bh(spinlock_t *lock)
return 0;
}
#include <linux/rwlock_api_smp.h>
#endif /* __LINUX_SPINLOCK_API_SMP_H */
include/linux/spinlock_api_up.h
+35 -31
View File
@@ -16,7 +16,7 @@
#define in_lock_functions(ADDR) 0
#define assert_spin_locked(lock) do { (void)(lock); } while (0)
#define assert_raw_spin_locked(lock) do { (void)(lock); } while (0)
/*
* In the UP-nondebug case there's no real locking going on, so the
@@ -40,7 +40,8 @@
do { preempt_enable(); __release(lock); (void)(lock); } while (0)
#define __UNLOCK_BH(lock) \
do { preempt_enable_no_resched(); local_bh_enable(); __release(lock); (void)(lock); } while (0)
do { preempt_enable_no_resched(); local_bh_enable(); \
__release(lock); (void)(lock); } while (0)
#define __UNLOCK_IRQ(lock) \
do { local_irq_enable(); __UNLOCK(lock); } while (0)
@@ -48,34 +49,37 @@
#define __UNLOCK_IRQRESTORE(lock, flags) \
do { local_irq_restore(flags); __UNLOCK(lock); } while (0)
#define _spin_lock(lock) __LOCK(lock)
#define _spin_lock_nested(lock, subclass) __LOCK(lock)
#define _read_lock(lock) __LOCK(lock)
#define _write_lock(lock) __LOCK(lock)
#define _spin_lock_bh(lock) __LOCK_BH(lock)
#define _read_lock_bh(lock) __LOCK_BH(lock)
#define _write_lock_bh(lock) __LOCK_BH(lock)
#define _spin_lock_irq(lock) __LOCK_IRQ(lock)
#define _read_lock_irq(lock) __LOCK_IRQ(lock)
#define _write_lock_irq(lock) __LOCK_IRQ(lock)
#define _spin_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
#define _read_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
#define _write_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
#define _spin_trylock(lock) ({ __LOCK(lock); 1; })
#define _read_trylock(lock) ({ __LOCK(lock); 1; })
#define _write_trylock(lock) ({ __LOCK(lock); 1; })
#define _spin_trylock_bh(lock) ({ __LOCK_BH(lock); 1; })
#define _spin_unlock(lock) __UNLOCK(lock)
#define _read_unlock(lock) __UNLOCK(lock)
#define _write_unlock(lock) __UNLOCK(lock)
#define _spin_unlock_bh(lock) __UNLOCK_BH(lock)
#define _write_unlock_bh(lock) __UNLOCK_BH(lock)
#define _read_unlock_bh(lock) __UNLOCK_BH(lock)
#define _spin_unlock_irq(lock) __UNLOCK_IRQ(lock)
#define _read_unlock_irq(lock) __UNLOCK_IRQ(lock)
#define _write_unlock_irq(lock) __UNLOCK_IRQ(lock)
#define _spin_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags)
#define _read_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags)
#define _write_unlock_irqrestore(lock, flags) __UNLOCK_IRQRESTORE(lock, flags)
#define _raw_spin_lock(lock) __LOCK(lock)
#define _raw_spin_lock_nested(lock, subclass) __LOCK(lock)
#define _raw_read_lock(lock) __LOCK(lock)
#define _raw_write_lock(lock) __LOCK(lock)
#define _raw_spin_lock_bh(lock) __LOCK_BH(lock)
#define _raw_read_lock_bh(lock) __LOCK_BH(lock)
#define _raw_write_lock_bh(lock) __LOCK_BH(lock)
#define _raw_spin_lock_irq(lock) __LOCK_IRQ(lock)
#define _raw_read_lock_irq(lock) __LOCK_IRQ(lock)
#define _raw_write_lock_irq(lock) __LOCK_IRQ(lock)
#define _raw_spin_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
#define _raw_read_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
#define _raw_write_lock_irqsave(lock, flags) __LOCK_IRQSAVE(lock, flags)
#define _raw_spin_trylock(lock) ({ __LOCK(lock); 1; })
#define _raw_read_trylock(lock) ({ __LOCK(lock); 1; })
#define _raw_write_trylock(lock) ({ __LOCK(lock); 1; })
#define _raw_spin_trylock_bh(lock) ({ __LOCK_BH(lock); 1; })
#define _raw_spin_unlock(lock) __UNLOCK(lock)
#define _raw_read_unlock(lock) __UNLOCK(lock)
#define _raw_write_unlock(lock) __UNLOCK(lock)
#define _raw_spin_unlock_bh(lock) __UNLOCK_BH(lock)
#define _raw_write_unlock_bh(lock) __UNLOCK_BH(lock)
#define _raw_read_unlock_bh(lock) __UNLOCK_BH(lock)
#define _raw_spin_unlock_irq(lock) __UNLOCK_IRQ(lock)
#define _raw_read_unlock_irq(lock) __UNLOCK_IRQ(lock)
#define _raw_write_unlock_irq(lock) __UNLOCK_IRQ(lock)
#define _raw_spin_unlock_irqrestore(lock, flags) \
__UNLOCK_IRQRESTORE(lock, flags)
#define _raw_read_unlock_irqrestore(lock, flags) \
__UNLOCK_IRQRESTORE(lock, flags)
#define _raw_write_unlock_irqrestore(lock, flags) \
__UNLOCK_IRQRESTORE(lock, flags)
#endif /* __LINUX_SPINLOCK_API_UP_H */
include/linux/spinlock_types.h
+44 -48
View File
@@ -17,8 +17,8 @@
#include <linux/lockdep.h>
typedef struct {
raw_spinlock_t raw_lock;
typedef struct raw_spinlock {
arch_spinlock_t raw_lock;
#ifdef CONFIG_GENERIC_LOCKBREAK
unsigned int break_lock;
#endif
@@ -29,26 +29,10 @@ typedef struct {
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lockdep_map dep_map;
#endif
} spinlock_t;
} raw_spinlock_t;
#define SPINLOCK_MAGIC 0xdead4ead
typedef struct {
raw_rwlock_t raw_lock;
#ifdef CONFIG_GENERIC_LOCKBREAK
unsigned int break_lock;
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
unsigned int magic, owner_cpu;
void *owner;
#endif
#ifdef CONFIG_DEBUG_LOCK_ALLOC
struct lockdep_map dep_map;
#endif
} rwlock_t;
#define RWLOCK_MAGIC 0xdeaf1eed
#define SPINLOCK_OWNER_INIT ((void *)-1L)
#ifdef CONFIG_DEBUG_LOCK_ALLOC
@@ -57,44 +41,56 @@ typedef struct {
# define SPIN_DEP_MAP_INIT(lockname)
#endif
#ifdef CONFIG_DEBUG_LOCK_ALLOC
# define RW_DEP_MAP_INIT(lockname) .dep_map = { .name = #lockname }
#ifdef CONFIG_DEBUG_SPINLOCK
# define SPIN_DEBUG_INIT(lockname) \
.magic = SPINLOCK_MAGIC, \
.owner_cpu = -1, \
.owner = SPINLOCK_OWNER_INIT,
#else
# define RW_DEP_MAP_INIT(lockname)
# define SPIN_DEBUG_INIT(lockname)
#endif
#ifdef CONFIG_DEBUG_SPINLOCK
# define __SPIN_LOCK_UNLOCKED(lockname) \
(spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
.magic = SPINLOCK_MAGIC, \
.owner = SPINLOCK_OWNER_INIT, \
.owner_cpu = -1, \
SPIN_DEP_MAP_INIT(lockname) }
#define __RW_LOCK_UNLOCKED(lockname) \
(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
.magic = RWLOCK_MAGIC, \
.owner = SPINLOCK_OWNER_INIT, \
.owner_cpu = -1, \
RW_DEP_MAP_INIT(lockname) }
#else
# define __SPIN_LOCK_UNLOCKED(lockname) \
(spinlock_t) { .raw_lock = __RAW_SPIN_LOCK_UNLOCKED, \
SPIN_DEP_MAP_INIT(lockname) }
#define __RW_LOCK_UNLOCKED(lockname) \
(rwlock_t) { .raw_lock = __RAW_RW_LOCK_UNLOCKED, \
RW_DEP_MAP_INIT(lockname) }
#define __RAW_SPIN_LOCK_INITIALIZER(lockname) \
{ \
.raw_lock = __ARCH_SPIN_LOCK_UNLOCKED, \
SPIN_DEBUG_INIT(lockname) \
SPIN_DEP_MAP_INIT(lockname) }
#define __RAW_SPIN_LOCK_UNLOCKED(lockname) \
(raw_spinlock_t) __RAW_SPIN_LOCK_INITIALIZER(lockname)
#define DEFINE_RAW_SPINLOCK(x) raw_spinlock_t x = __RAW_SPIN_LOCK_UNLOCKED(x)
typedef struct spinlock {
union {
struct raw_spinlock rlock;
#ifdef CONFIG_DEBUG_LOCK_ALLOC
# define LOCK_PADSIZE (offsetof(struct raw_spinlock, dep_map))
struct {
u8 __padding[LOCK_PADSIZE];
struct lockdep_map dep_map;
};
#endif
};
} spinlock_t;
#define __SPIN_LOCK_INITIALIZER(lockname) \
{ { .rlock = __RAW_SPIN_LOCK_INITIALIZER(lockname) } }
#define __SPIN_LOCK_UNLOCKED(lockname) \
(spinlock_t ) __SPIN_LOCK_INITIALIZER(lockname)
/*
* SPIN_LOCK_UNLOCKED and RW_LOCK_UNLOCKED defeat lockdep state tracking and
* are hence deprecated.
* Please use DEFINE_SPINLOCK()/DEFINE_RWLOCK() or
* __SPIN_LOCK_UNLOCKED()/__RW_LOCK_UNLOCKED() as appropriate.
* SPIN_LOCK_UNLOCKED defeats lockdep state tracking and is hence
* deprecated.
* Please use DEFINE_SPINLOCK() or __SPIN_LOCK_UNLOCKED() as
* appropriate.
*/
#define SPIN_LOCK_UNLOCKED __SPIN_LOCK_UNLOCKED(old_style_spin_init)
#define RW_LOCK_UNLOCKED __RW_LOCK_UNLOCKED(old_style_rw_init)
#define DEFINE_SPINLOCK(x) spinlock_t x = __SPIN_LOCK_UNLOCKED(x)
#define DEFINE_RWLOCK(x) rwlock_t x = __RW_LOCK_UNLOCKED(x)
#include <linux/rwlock_types.h>
#endif /* __LINUX_SPINLOCK_TYPES_H */
include/linux/spinlock_types_up.h
+6 -6
View File
@@ -16,22 +16,22 @@
typedef struct {
volatile unsigned int slock;
} raw_spinlock_t;
} arch_spinlock_t;
#define __RAW_SPIN_LOCK_UNLOCKED { 1 }
#define __ARCH_SPIN_LOCK_UNLOCKED { 1 }
#else
typedef struct { } raw_spinlock_t;
typedef struct { } arch_spinlock_t;
#define __RAW_SPIN_LOCK_UNLOCKED { }
#define __ARCH_SPIN_LOCK_UNLOCKED { }
#endif
typedef struct {
/* no debug version on UP */
} raw_rwlock_t;
} arch_rwlock_t;
#define __RAW_RW_LOCK_UNLOCKED { }
#define __ARCH_RW_LOCK_UNLOCKED { }
#endif /* __LINUX_SPINLOCK_TYPES_UP_H */
include/linux/spinlock_up.h
+21 -21
View File
@@ -18,21 +18,21 @@
*/
#ifdef CONFIG_DEBUG_SPINLOCK
#define __raw_spin_is_locked(x) ((x)->slock == 0)
#define arch_spin_is_locked(x) ((x)->slock == 0)
static inline void __raw_spin_lock(raw_spinlock_t *lock)
static inline void arch_spin_lock(arch_spinlock_t *lock)
{
lock->slock = 0;
}
static inline void
__raw_spin_lock_flags(raw_spinlock_t *lock, unsigned long flags)
arch_spin_lock_flags(arch_spinlock_t *lock, unsigned long flags)
{
local_irq_save(flags);
lock->slock = 0;
}
static inline int __raw_spin_trylock(raw_spinlock_t *lock)
static inline int arch_spin_trylock(arch_spinlock_t *lock)
{
char oldval = lock->slock;
@@ -41,7 +41,7 @@ static inline int __raw_spin_trylock(raw_spinlock_t *lock)
return oldval > 0;
}
static inline void __raw_spin_unlock(raw_spinlock_t *lock)
static inline void arch_spin_unlock(arch_spinlock_t *lock)
{
lock->slock = 1;
}
@@ -49,28 +49,28 @@ static inline void __raw_spin_unlock(raw_spinlock_t *lock)
/*
* Read-write spinlocks. No debug version.
*/
#define __raw_read_lock(lock) do { (void)(lock); } while (0)
#define __raw_write_lock(lock) do { (void)(lock); } while (0)
#define __raw_read_trylock(lock) ({ (void)(lock); 1; })
#define __raw_write_trylock(lock) ({ (void)(lock); 1; })
#define __raw_read_unlock(lock) do { (void)(lock); } while (0)
#define __raw_write_unlock(lock) do { (void)(lock); } while (0)
#define arch_read_lock(lock) do { (void)(lock); } while (0)
#define arch_write_lock(lock) do { (void)(lock); } while (0)
#define arch_read_trylock(lock) ({ (void)(lock); 1; })
#define arch_write_trylock(lock) ({ (void)(lock); 1; })
#define arch_read_unlock(lock) do { (void)(lock); } while (0)
#define arch_write_unlock(lock) do { (void)(lock); } while (0)
#else /* DEBUG_SPINLOCK */
#define __raw_spin_is_locked(lock) ((void)(lock), 0)
#define arch_spin_is_locked(lock) ((void)(lock), 0)
/* for sched.c and kernel_lock.c: */
# define __raw_spin_lock(lock) do { (void)(lock); } while (0)
# define __raw_spin_lock_flags(lock, flags) do { (void)(lock); } while (0)
# define __raw_spin_unlock(lock) do { (void)(lock); } while (0)
# define __raw_spin_trylock(lock) ({ (void)(lock); 1; })
# define arch_spin_lock(lock) do { (void)(lock); } while (0)
# define arch_spin_lock_flags(lock, flags) do { (void)(lock); } while (0)
# define arch_spin_unlock(lock) do { (void)(lock); } while (0)
# define arch_spin_trylock(lock) ({ (void)(lock); 1; })
#endif /* DEBUG_SPINLOCK */
#define __raw_spin_is_contended(lock) (((void)(lock), 0))
#define arch_spin_is_contended(lock) (((void)(lock), 0))
#define __raw_read_can_lock(lock) (((void)(lock), 1))
#define __raw_write_can_lock(lock) (((void)(lock), 1))
#define arch_read_can_lock(lock) (((void)(lock), 1))
#define arch_write_can_lock(lock) (((void)(lock), 1))
#define __raw_spin_unlock_wait(lock) \
do { cpu_relax(); } while (__raw_spin_is_locked(lock))
#define arch_spin_unlock_wait(lock) \
do { cpu_relax(); } while (arch_spin_is_locked(lock))
#endif /* __LINUX_SPINLOCK_UP_H */