linux-kernel - [PATCH] ARM: cpuidle: declare cpuidle_ops __read

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Date:	Wed, 10 Aug 2016 16:49:57 +0800
From:	Jisheng Zhang <jszhang@...vell.com>
To:	<linux@...linux.org.uk>, <daniel.lezcano@...aro.org>
CC:	<linux-arm-kernel@...ts.infradead.org>,
	<linux-kernel@...r.kernel.org>, Jisheng Zhang <jszhang@...vell.com>
Subject: [PATCH] ARM: cpuidle: declare cpuidle_ops __read_mostly

cpuidle_ops is initialized once by arm_cpuidle_read_ops() during
initialization, and thereafter is mostly read in arm_cpuidle_suspend()

The fact that it is mostly read and not written to makes it candidates
for __read_mostly declarations.

Signed-off-by: Jisheng Zhang <jszhang@...vell.com>
---
 arch/arm/kernel/cpuidle.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/arm/kernel/cpuidle.c b/arch/arm/kernel/cpuidle.c
index 7dccc96..762e0929 100644
--- a/arch/arm/kernel/cpuidle.c
+++ b/arch/arm/kernel/cpuidle.c
@@ -19,7 +19,7 @@ extern struct of_cpuidle_method __cpuidle_method_of_table[];
 static const struct of_cpuidle_method __cpuidle_method_of_table_sentinel
 	__used __section(__cpuidle_method_of_table_end);
 
-static struct cpuidle_ops cpuidle_ops[NR_CPUS];
+static struct cpuidle_ops cpuidle_ops[NR_CPUS] __read_mostly;
 
 /**
  * arm_cpuidle_simple_enter() - a wrapper to cpu_do_idle()
-- 
2.8.1