From: Lai Jiangshan Date: Tue, 21 Dec 2010 09:55:10 +0000 (+0800) Subject: futex,plist: Remove debug lock assignment from plist_node X-Git-Url: http://drtracing.org/?a=commitdiff_plain;h=017f2b239dabb2740b91df162e004371b861f371;p=deliverable%2Flinux.git futex,plist: Remove debug lock assignment from plist_node The original code uses &plist_node->plist as the fake head of the priority list for plist_del(), these debug locks in the fake head are needed for CONFIG_DEBUG_PI_LIST. But now we always pass the real head to plist_del(), the debug locks in plist_node will not be used, so we remove these assignments. Acked-by: Darren Hart Signed-off-by: Lai Jiangshan LKML-Reference: <4D10797E.7040803@cn.fujitsu.com> Signed-off-by: Steven Rostedt --- diff --git a/kernel/futex.c b/kernel/futex.c index 6feeea4f8f15..9fe913141ec9 100644 --- a/kernel/futex.c +++ b/kernel/futex.c @@ -1089,9 +1089,6 @@ void requeue_futex(struct futex_q *q, struct futex_hash_bucket *hb1, plist_del(&q->list, &hb1->chain); plist_add(&q->list, &hb2->chain); q->lock_ptr = &hb2->lock; -#ifdef CONFIG_DEBUG_PI_LIST - q->list.plist.spinlock = &hb2->lock; -#endif } get_futex_key_refs(key2); q->key = *key2; @@ -1124,9 +1121,6 @@ void requeue_pi_wake_futex(struct futex_q *q, union futex_key *key, q->rt_waiter = NULL; q->lock_ptr = &hb->lock; -#ifdef CONFIG_DEBUG_PI_LIST - q->list.plist.spinlock = &hb->lock; -#endif wake_up_state(q->task, TASK_NORMAL); } @@ -1474,9 +1468,6 @@ static inline void queue_me(struct futex_q *q, struct futex_hash_bucket *hb) prio = min(current->normal_prio, MAX_RT_PRIO); plist_node_init(&q->list, prio); -#ifdef CONFIG_DEBUG_PI_LIST - q->list.plist.spinlock = &hb->lock; -#endif plist_add(&q->list, &hb->chain); q->task = current; spin_unlock(&hb->lock);