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| author | Oleg Nesterov <oleg@tv-sign.ru> | 2008-07-25 01:47:52 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2008-07-25 10:53:40 -0700 |
| commit | a67da70dc0955580665f5444f318b92e69a3c272 (patch) | |
| tree | 204164627e0fb6495516b24cca005845f492f600 /kernel/workqueue.c | |
| parent | 69b895fd13d73aebf62b75502eb6513d43057ba3 (diff) | |
| download | lwn-a67da70dc0955580665f5444f318b92e69a3c272.tar.gz lwn-a67da70dc0955580665f5444f318b92e69a3c272.zip | |
workqueues: lockdep annotations for flush_work()
Add lockdep annotations to flush_work() and update the comment.
Signed-off-by: Oleg Nesterov <oleg@tv-sign.ru>
Cc: Jarek Poplawski <jarkao2@o2.pl>
Acked-by: Johannes Berg <johannes@sipsolutions.net>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/workqueue.c')
| -rw-r--r-- | kernel/workqueue.c | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/kernel/workqueue.c b/kernel/workqueue.c index 828e58230cbc..4fcb75b98443 100644 --- a/kernel/workqueue.c +++ b/kernel/workqueue.c @@ -427,6 +427,8 @@ EXPORT_SYMBOL_GPL(flush_workqueue); * flush_work - block until a work_struct's callback has terminated * @work: the work which is to be flushed * + * Returns false if @work has already terminated. + * * It is expected that, prior to calling flush_work(), the caller has * arranged for the work to not be requeued, otherwise it doesn't make * sense to use this function. @@ -442,6 +444,9 @@ int flush_work(struct work_struct *work) if (!cwq) return 0; + lock_acquire(&cwq->wq->lockdep_map, 0, 0, 0, 2, _THIS_IP_); + lock_release(&cwq->wq->lockdep_map, 1, _THIS_IP_); + prev = NULL; spin_lock_irq(&cwq->lock); if (!list_empty(&work->entry)) { |