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authorLance Roy <ldr709@gmail.com>2018-10-02 22:38:57 -0700
committerThomas Gleixner <tglx@linutronix.de>2018-10-09 13:19:28 +0200
commit4de1a293a08bdf8ec1530e02163930ac86f80ea2 (patch)
treec1a9fff82f72eeb9c55c3f7d1ae57ff3c63a587a
parent8ca2b56cd7da98fc8f8d787bb706b9d6c8674a3b (diff)
futex: Replace spin_is_locked() with lockdep
lockdep_assert_held() is better suited for checking locking requirements, since it won't get confused when the lock is held by some other task. This is also a step towards possibly removing spin_is_locked(). Signed-off-by: Lance Roy <ldr709@gmail.com> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Cc: "Paul E. McKenney" <paulmck@linux.ibm.com> Cc: Peter Zijlstra <peterz@infradead.org> Cc: Darren Hart <dvhart@infradead.org> Link: https://lkml.kernel.org/r/20181003053902.6910-12-ldr709@gmail.com
-rw-r--r--kernel/futex.c4
1 files changed, 2 insertions, 2 deletions
diff --git a/kernel/futex.c b/kernel/futex.c
index 11fc3bb456d6..3e2de8fc1891 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -1365,9 +1365,9 @@ static void __unqueue_futex(struct futex_q *q)
{
struct futex_hash_bucket *hb;
- if (WARN_ON_SMP(!q->lock_ptr || !spin_is_locked(q->lock_ptr))
- || WARN_ON(plist_node_empty(&q->list)))
+ if (WARN_ON_SMP(!q->lock_ptr) || WARN_ON(plist_node_empty(&q->list)))
return;
+ lockdep_assert_held(q->lock_ptr);
hb = container_of(q->lock_ptr, struct futex_hash_bucket, lock);
plist_del(&q->list, &hb->chain);