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sched/completion: Add wait_for_completion_state() 

Allows waiting with a custom @state.

Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Reviewed-by: Ingo Molnar <mingo@kernel.org>
Link: https://lore.kernel.org/r/20220822114648.922711674@infradead.org
This commit is contained in:
Peter Zijlstra 2022-08-22 13:18:20 +02:00
parent f9fc8cad97
commit 929659acea
2 changed files with 13 additions and 0 deletions
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1
include/linux/completion.h
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@ -103,6 +103,7 @@ extern void wait_for_completion(struct completion *);
extern void wait_for_completion_io(struct completion *);
extern int wait_for_completion_interruptible(struct completion *x);
extern int wait_for_completion_killable(struct completion *x);
extern int wait_for_completion_state(struct completion *x, unsigned int state);
extern unsigned long wait_for_completion_timeout(struct completion *x,
unsigned long timeout);
extern unsigned long wait_for_completion_io_timeout(struct completion *x,

12
kernel/sched/completion.c
View File

@ -204,6 +204,7 @@ EXPORT_SYMBOL(wait_for_completion_io_timeout);
int __sched wait_for_completion_interruptible(struct completion *x)
{
long t = wait_for_common(x, MAX_SCHEDULE_TIMEOUT, TASK_INTERRUPTIBLE);
if (t == -ERESTARTSYS)
return t;
return 0;
@ -241,12 +242,23 @@ EXPORT_SYMBOL(wait_for_completion_interruptible_timeout);
int __sched wait_for_completion_killable(struct completion *x)
{
long t = wait_for_common(x, MAX_SCHEDULE_TIMEOUT, TASK_KILLABLE);
if (t == -ERESTARTSYS)
return t;
return 0;
}
EXPORT_SYMBOL(wait_for_completion_killable);
int __sched wait_for_completion_state(struct completion *x, unsigned int state)
{
long t = wait_for_common(x, MAX_SCHEDULE_TIMEOUT, state);
if (t == -ERESTARTSYS)
return t;
return 0;
}
EXPORT_SYMBOL(wait_for_completion_state);
/**
* wait_for_completion_killable_timeout: - waits for completion of a task (w/(to,killable))
* @x: holds the state of this particular completion