linux-kernel - [PATCH 3/4] SCHED: Don't use BKL count for idle preempt count initialization

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Date:	Fri,  6 May 2011 14:05:27 -0700
From:	Andi Kleen <andi@...stfloor.org>
To:	linux-kernel@...r.kernel.org
Cc:	peterz@...radead.org, arnd@...db.de, akpm@...ux-foundation.org,
	Andi Kleen <ak@...ux.intel.com>
Subject: [PATCH 3/4] SCHED: Don't use BKL count for idle preempt count initialization

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

No need for that ever as far as I can see. Just set it to 0.

Signed-off-by: Andi Kleen <ak@...ux.intel.com>
---
 kernel/sched.c |    5 +----
 1 files changed, 1 insertions(+), 4 deletions(-)

diff --git a/kernel/sched.c b/kernel/sched.c
index 7fa5334..f70b2cc 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -5776,11 +5776,8 @@ void __cpuinit init_idle(struct task_struct *idle, int cpu)
 	raw_spin_unlock_irqrestore(&rq->lock, flags);
 
 	/* Set the preempt count _outside_ the spinlocks! */
-#if defined(CONFIG_PREEMPT)
-	task_thread_info(idle)->preempt_count = (idle->lock_depth >= 0);
-#else
 	task_thread_info(idle)->preempt_count = 0;
-#endif
+
 	/*
 	 * The idle tasks have their own, simple scheduling class:
 	 */
-- 
1.7.4.4

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