Commit 4de1a293 authored Oct 02, 2018 by Lance Roy Committed by Thomas Gleixner Oct 09, 2018

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

parent 8ca2b56c

kernel/futex.c

+2 −2

Original line number	Diff line number	Diff line
		@@ -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);

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