dlan17/linux
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

printk: nbcon: Relocate nbcon_atomic_emit_one()

Browse Source 
Move nbcon_atomic_emit_one() so that it can be used by
nbcon_kthread_func() in a follow-up commit.

Signed-off-by: John Ogness <john.ogness@linutronix.de>
Reviewed-by: Petr Mladek <pmladek@suse.com>
Link: https://lore.kernel.org/r/20240904120536.115780-8-john.ogness@linutronix.de
Signed-off-by: Petr Mladek <pmladek@suse.com>
This commit is contained in:
John Ogness
2024-09-04 15:56:32 +02:00
committed by Petr Mladek
parent 76f258bf3f
commit 9b79a3d0d6
1 changed files with 39 additions and 39 deletions
Download Patch File Download Diff File Expand all files Collapse all files
kernel/printk/nbcon.c
+39 -39
View File
@@ -1042,6 +1042,45 @@ update_con:
return nbcon_context_exit_unsafe(ctxt);
}
/*
* nbcon_atomic_emit_one - Print one record for an nbcon console using the
* write_atomic() callback
* @wctxt: An initialized write context struct to use for this context
*
* Return: True, when a record has been printed and there are still
* pending records. The caller might want to continue flushing.
*
* False, when there is no pending record, or when the console
* context cannot be acquired, or the ownership has been lost.
* The caller should give up. Either the job is done, cannot be
* done, or will be handled by the owning context.
*
* This is an internal helper to handle the locking of the console before
* calling nbcon_emit_next_record().
*/
static bool nbcon_atomic_emit_one(struct nbcon_write_context *wctxt)
{
struct nbcon_context *ctxt = &ACCESS_PRIVATE(wctxt, ctxt);
if (!nbcon_context_try_acquire(ctxt))
return false;
/*
* nbcon_emit_next_record() returns false when the console was
* handed over or taken over. In both cases the context is no
* longer valid.
*
* The higher priority printing context takes over responsibility
* to print the pending records.
*/
if (!nbcon_emit_next_record(wctxt, true))
return false;
nbcon_context_release(ctxt);
return ctxt->backlog;
}
/**
* nbcon_kthread_should_wakeup - Check whether a printer thread should wakeup
* @con: Console to operate on
@@ -1319,45 +1358,6 @@ enum nbcon_prio nbcon_get_default_prio(void)
return NBCON_PRIO_NORMAL;
}
/*
* nbcon_atomic_emit_one - Print one record for an nbcon console using the
* write_atomic() callback
* @wctxt: An initialized write context struct to use for this context
*
* Return: True, when a record has been printed and there are still
* pending records. The caller might want to continue flushing.
*
* False, when there is no pending record, or when the console
* context cannot be acquired, or the ownership has been lost.
* The caller should give up. Either the job is done, cannot be
* done, or will be handled by the owning context.
*
* This is an internal helper to handle the locking of the console before
* calling nbcon_emit_next_record().
*/
static bool nbcon_atomic_emit_one(struct nbcon_write_context *wctxt)
{
struct nbcon_context *ctxt = &ACCESS_PRIVATE(wctxt, ctxt);
if (!nbcon_context_try_acquire(ctxt))
return false;
/*
* nbcon_emit_next_record() returns false when the console was
* handed over or taken over. In both cases the context is no
* longer valid.
*
* The higher priority printing context takes over responsibility
* to print the pending records.
*/
if (!nbcon_emit_next_record(wctxt, true))
return false;
nbcon_context_release(ctxt);
return ctxt->backlog;
}
/**
* nbcon_legacy_emit_next_record - Print one record for an nbcon console
* in legacy contexts