linux-kernel - [PATCH] sched: unite unlikely pairs in rt_policy() and schedule

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Date:	Tue, 13 May 2008 23:44:11 +0200
From:	Roel Kluin <roel.kluin@...il.com>
To:	Ingo Molnar <mingo@...e.hu>, rml@...h9.net
CC:	lkml <linux-kernel@...r.kernel.org>
Subject: [PATCH] sched: unite unlikely pairs in rt_policy() and schedule_debug()

Removes obfuscation and may improve assembly

Signed-off-by: Roel Kluin <roel.kluin@...il.com>
---
diff --git a/kernel/sched.c b/kernel/sched.c
index 8841a91..86a0cd3 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -136,7 +136,7 @@ static inline void sg_inc_cpu_power(struct sched_group *sg, u32 val)
 
 static inline int rt_policy(int policy)
 {
-	if (unlikely(policy == SCHED_FIFO) || unlikely(policy == SCHED_RR))
+	if (unlikely(policy == SCHED_FIFO || policy == SCHED_RR))
 		return 1;
 	return 0;
 }
@@ -4430,7 +4430,7 @@ static inline void schedule_debug(struct task_struct *prev)
 	 * schedule() atomically, we ignore that path for now.
 	 * Otherwise, whine if we are scheduling when we should not be.
 	 */
-	if (unlikely(in_atomic_preempt_off()) && unlikely(!prev->exit_state))
+	if (unlikely(in_atomic_preempt_off() && !prev->exit_state))
 		__schedule_bug(prev);
 
 	profile_hit(SCHED_PROFILING, __builtin_return_address(0));
--
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