linux-kernel - [tip:core/futexes] futex: Add lock context annotations

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Message-ID: <tip-15e408cd6ccc3f4f453d87ccd5bc7a84d59feb96@git.kernel.org>
Date:	Sat, 18 Sep 2010 10:22:50 GMT
From:	tip-bot for Namhyung Kim <namhyung@...il.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, dvhltc@...ibm.com, hpa@...or.com,
	mingo@...hat.com, a.p.zijlstra@...llo.nl, tglx@...utronix.de,
	namhyung@...il.com
Subject: [tip:core/futexes] futex: Add lock context annotations

Commit-ID:  15e408cd6ccc3f4f453d87ccd5bc7a84d59feb96
Gitweb:     http://git.kernel.org/tip/15e408cd6ccc3f4f453d87ccd5bc7a84d59feb96
Author:     Namhyung Kim <namhyung@...il.com>
AuthorDate: Tue, 14 Sep 2010 21:43:48 +0900
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Sat, 18 Sep 2010 12:19:21 +0200

futex: Add lock context annotations

queue_lock/unlock/me() and unqueue_me_pi() grab/release spinlocks
but are missing proper annotations. Add them.

Signed-off-by: Namhyung Kim <namhyung@...il.com>
Cc: Peter Zijlstra <a.p.zijlstra@...llo.nl>
Cc: Darren Hart <dvhltc@...ibm.com>
LKML-Reference: <1284468228-8723-3-git-send-email-namhyung@...il.com>
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 kernel/futex.c |    4 ++++
 1 files changed, 4 insertions(+), 0 deletions(-)

diff --git a/kernel/futex.c b/kernel/futex.c
index 45e448a..92a31d4 100644
--- a/kernel/futex.c
+++ b/kernel/futex.c
@@ -1360,6 +1360,7 @@ out:
 
 /* The key must be already stored in q->key. */
 static inline struct futex_hash_bucket *queue_lock(struct futex_q *q)
+	__acquires(&hb->lock)
 {
 	struct futex_hash_bucket *hb;
 
@@ -1373,6 +1374,7 @@ static inline struct futex_hash_bucket *queue_lock(struct futex_q *q)
 
 static inline void
 queue_unlock(struct futex_q *q, struct futex_hash_bucket *hb)
+	__releases(&hb->lock)
 {
 	spin_unlock(&hb->lock);
 	drop_futex_key_refs(&q->key);
@@ -1391,6 +1393,7 @@ queue_unlock(struct futex_q *q, struct futex_hash_bucket *hb)
  * an example).
  */
 static inline void queue_me(struct futex_q *q, struct futex_hash_bucket *hb)
+	__releases(&hb->lock)
 {
 	int prio;
 
@@ -1471,6 +1474,7 @@ retry:
  * and dropped here.
  */
 static void unqueue_me_pi(struct futex_q *q)
+	__releases(q->lock_ptr)
 {
 	WARN_ON(plist_node_empty(&q->list));
 	plist_del(&q->list, &q->list.plist);
--
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