linux-kernel - [PATCH 07/13] futex: Use lockdep_assert

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Date:	Tue, 27 Mar 2012 17:47:11 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	akpm@...ux-foundation.org
Cc:	linux-kernel@...r.kernel.org, Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 07/13] futex: Use lockdep_assert_held() for lock checking

From: Andi Kleen <ak@...ux.intel.com>

Use lockdep_assert_held() for lock checking instead of a strange
homegrown variant. This removes the return for this case, but
that is unlikely to be useful anyways.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 kernel/futex.c |    5 +++--
 1 files changed, 3 insertions(+), 2 deletions(-)

diff --git a/kernel/futex.c b/kernel/futex.c
index 1614be2..a77dda7 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -823,8 +823,9 @@ 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 (q->lock_ptr)
+		lockdep_assert_held(q->lock_ptr);
+	if (WARN_ON(plist_node_empty(&q->list)))
 		return;
 
 	hb = container_of(q->lock_ptr, struct futex_hash_bucket, lock);
-- 
1.7.7.6

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