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[PATCH] Add kthread_stop_sem()

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Enhance the kthread API by adding kthread_stop_sem, for use in stopping
threads that spend their idle time waiting on a semaphore.

Signed-off-by: Alan Stern <stern@rowland.harvard.edu>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
This commit is contained in:
Alan Stern
2005-10-30 15:01:40 -08:00
committed by Linus Torvalds
parent 83521d3eb8
commit 61e1a9ea4b
2 changed files with 23 additions and 2 deletions
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12
include/linux/kthread.h
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@@ -69,6 +69,18 @@ void kthread_bind(struct task_struct *k, unsigned int cpu);
* was never called. */
int kthread_stop(struct task_struct *k);
/**
* kthread_stop_sem: stop a thread created by kthread_create().
* @k: thread created by kthread_create().
* @s: semaphore that @k waits on while idle.
*
* Does essentially the same thing as kthread_stop() above, but wakes
* @k by calling up(@s).
*
* Returns the result of threadfn(), or -EINTR if wake_up_process()
* was never called. */
int kthread_stop_sem(struct task_struct *k, struct semaphore *s);
/**
* kthread_should_stop: should this kthread return now?
*