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userfaultfd: Replace spin_is_locked() with lockdep 

lockdep_assert_held() is better suited to checking locking requirements,
since it only checks if the current thread holds the lock regardless of
whether someone else does. This is also a step towards possibly removing
spin_is_locked().

Signed-off-by: Lance Roy <ldr709@gmail.com>
Cc: Alexander Viro <viro@zeniv.linux.org.uk>
Cc: <linux-fsdevel@vger.kernel.org>
Signed-off-by: Paul E. McKenney <paulmck@linux.ibm.com>
This commit is contained in:
Lance Roy 2018-10-04 23:45:44 -07:00 committed by Paul E. McKenney
parent 97eeebea89
commit 456a737896
1 changed files with 1 additions and 1 deletions
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2
fs/userfaultfd.c
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@ -926,7 +926,7 @@ static inline struct userfaultfd_wait_queue *find_userfault_in(
wait_queue_entry_t *wq; wait_queue_entry_t *wq;
struct userfaultfd_wait_queue *uwq; struct userfaultfd_wait_queue *uwq;
VM_BUG_ON(!spin_is_locked(&wqh->lock)); lockdep_assert_held(&wqh->lock);
uwq = NULL; uwq = NULL;
if (!waitqueue_active(wqh)) if (!waitqueue_active(wqh))