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Add wait_for_completion_killable 

Signed-off-by: Matthew Wilcox <willy@linux.intel.com>
This commit is contained in:
Matthew Wilcox 2007-12-06 12:29:54 -05:00 committed by Matthew Wilcox
parent 1411d5a7fb
commit 009e577e07
2 changed files with 14 additions and 2 deletions
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1
include/linux/completion.h
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@ -44,6 +44,7 @@ static inline void init_completion(struct completion *x)
extern void wait_for_completion(struct completion *);
extern int wait_for_completion_interruptible(struct completion *x);
extern int wait_for_completion_killable(struct completion *x);
extern unsigned long wait_for_completion_timeout(struct completion *x,
unsigned long timeout);
extern unsigned long wait_for_completion_interruptible_timeout(

15
kernel/sched.c
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@ -3881,8 +3881,10 @@ do_wait_for_common(struct completion *x, long timeout, int state)
wait.flags |= WQ_FLAG_EXCLUSIVE;
__add_wait_queue_tail(&x->wait, &wait);
do {
if (state == TASK_INTERRUPTIBLE &&
signal_pending(current)) {
if ((state == TASK_INTERRUPTIBLE &&
signal_pending(current)) ||
(state == TASK_KILLABLE &&
fatal_signal_pending(current))) {
__remove_wait_queue(&x->wait, &wait);
return -ERESTARTSYS;
}
@ -3942,6 +3944,15 @@ wait_for_completion_interruptible_timeout(struct completion *x,
}
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);
static long __sched
sleep_on_common(wait_queue_head_t *q, int state, long timeout)
{