-
由 Yihao Wu 提交于
Commit b7dbcc0e "NFSv4.1: Fix a race where CB_NOTIFY_LOCK fails to wake a waiter" found this bug. However it didn't fix it. This commit replaces schedule_timeout() with wait_woken() and default_wake_function() with woken_wake_function() in function nfs4_retry_setlk() and nfs4_wake_lock_waiter(). wait_woken() uses memory barriers in its implementation to avoid potential race condition when putting a process into sleeping state and then waking it up. Fixes: a1d617d8 ("nfs: allow blocking locks to be awoken by lock callbacks") Cc: stable@vger.kernel.org #4.9+ Signed-off-by: NYihao Wu <wuyihao@linux.alibaba.com> Reviewed-by: NJeff Layton <jlayton@kernel.org> Acked-by: NJoseph Qi <joseph.qi@linux.alibaba.com>
327136ff