提交 42577ca8 编写于 作者: D David Howells 提交者: Linus Torvalds

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trying to clean up after a netfs cookie is withdrawn.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: NYacine Belkadi <yacine.belkadi.1@gmail.com>
Signed-off-by: NDavid Howells <dhowells@redhat.com>
Reviewed-by: NJeff Layton <jlayton@redhat.com>
cc: Milosz Tanski <milosz@adfin.com>
Signed-off-by: NLinus Torvalds <torvalds@linux-foundation.org>
上级 7c6d4dca
......@@ -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;
......
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