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| author | Alan Stern <stern@rowland.harvard.edu> | 2005-10-31 00:01:40 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-10-31 02:37:17 +0100 |
| commit | 61e1a9ea4b425eb8c3b4965c35fe953bd881728f (patch) | |
| tree | 2dcf017eedd4a72698593c878aff3ae31e3a6b09 /kernel/kthread.c | |
| parent | [PATCH] cfq-iosched: move tasklist walk to elevator.c (diff) | |
| download | linux-61e1a9ea4b425eb8c3b4965c35fe953bd881728f.tar.xz linux-61e1a9ea4b425eb8c3b4965c35fe953bd881728f.zip | |
[PATCH] Add kthread_stop_sem()
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>
Diffstat (limited to 'kernel/kthread.c')
| -rw-r--r-- | kernel/kthread.c | 13 |
1 files changed, 11 insertions, 2 deletions
diff --git a/kernel/kthread.c b/kernel/kthread.c index f50f174e92da..e75950a1092c 100644 --- a/kernel/kthread.c +++ b/kernel/kthread.c @@ -165,6 +165,12 @@ EXPORT_SYMBOL(kthread_bind); int kthread_stop(struct task_struct *k) { + return kthread_stop_sem(k, NULL); +} +EXPORT_SYMBOL(kthread_stop); + +int kthread_stop_sem(struct task_struct *k, struct semaphore *s) +{ int ret; down(&kthread_stop_lock); @@ -178,7 +184,10 @@ int kthread_stop(struct task_struct *k) /* Now set kthread_should_stop() to true, and wake it up. */ kthread_stop_info.k = k; - wake_up_process(k); + if (s) + up(s); + else + wake_up_process(k); put_task_struct(k); /* Once it dies, reset stop ptr, gather result and we're done. */ @@ -189,7 +198,7 @@ int kthread_stop(struct task_struct *k) return ret; } -EXPORT_SYMBOL(kthread_stop); +EXPORT_SYMBOL(kthread_stop_sem); static __init int helper_init(void) { |