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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 <dvhart@linux.intel.com> Signed-off-by: Lai Jiangshan <laijs@cn.fujitsu.com> LKML-Reference: <4D10797E.7040803@cn.fujitsu.com> Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
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@ -1089,9 +1089,6 @@ void requeue_futex(struct futex_q *q, struct futex_hash_bucket *hb1,
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plist_del(&q->list, &hb1->chain);
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plist_add(&q->list, &hb2->chain);
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q->lock_ptr = &hb2->lock;
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#ifdef CONFIG_DEBUG_PI_LIST
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q->list.plist.spinlock = &hb2->lock;
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#endif
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}
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get_futex_key_refs(key2);
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q->key = *key2;
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@ -1124,9 +1121,6 @@ void requeue_pi_wake_futex(struct futex_q *q, union futex_key *key,
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q->rt_waiter = NULL;
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q->lock_ptr = &hb->lock;
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#ifdef CONFIG_DEBUG_PI_LIST
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q->list.plist.spinlock = &hb->lock;
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#endif
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wake_up_state(q->task, TASK_NORMAL);
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}
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@ -1474,9 +1468,6 @@ static inline void queue_me(struct futex_q *q, struct futex_hash_bucket *hb)
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prio = min(current->normal_prio, MAX_RT_PRIO);
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plist_node_init(&q->list, prio);
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#ifdef CONFIG_DEBUG_PI_LIST
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q->list.plist.spinlock = &hb->lock;
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#endif
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plist_add(&q->list, &hb->chain);
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q->task = current;
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spin_unlock(&hb->lock);
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