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| author | David Howells <dhowells@redhat.com> | 2013-07-23 16:49:24 +0100 |
|---|---|---|
| committer | Linus Torvalds <torvalds@linux-foundation.org> | 2013-07-23 15:46:48 -0700 |
| commit | 42577ca8c3616baaafdd8f167b2e1fb959026081 (patch) | |
| tree | 81a5bba5e15a6f680541aca0f04b204e8a2f4145 /kernel/wait.c | |
| parent | 7c6d4dca777d6423cb9ccdc019cad94c75adcbe4 (diff) | |
| download | lwn-42577ca8c3616baaafdd8f167b2e1fb959026081.tar.gz lwn-42577ca8c3616baaafdd8f167b2e1fb959026081.zip | |
Fix __wait_on_atomic_t() to call the action func if the counter != 0
Fix __wait_on_atomic_t() so that it calls the action func if the counter != 0
rather than if the counter is 0 so as to be analogous to __wait_on_bit().
Thanks to Yacine who found this by visual inspection.
This will affect FS-Cache in that it will could fail to sleep correctly when
trying to clean up after a netfs cookie is withdrawn.
Reported-by: Yacine Belkadi <yacine.belkadi.1@gmail.com>
Signed-off-by: David Howells <dhowells@redhat.com>
Reviewed-by: Jeff Layton <jlayton@redhat.com>
cc: Milosz Tanski <milosz@adfin.com>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'kernel/wait.c')
| -rw-r--r-- | kernel/wait.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/kernel/wait.c b/kernel/wait.c index ce0daa320a26..dec68bd4e9d8 100644 --- a/kernel/wait.c +++ b/kernel/wait.c @@ -333,7 +333,8 @@ int __wait_on_atomic_t(wait_queue_head_t *wq, struct wait_bit_queue *q, prepare_to_wait(wq, &q->wait, mode); val = q->key.flags; if (atomic_read(val) == 0) - ret = (*action)(val); + break; + ret = (*action)(val); } while (!ret && atomic_read(val) != 0); finish_wait(wq, &q->wait); return ret; |