linux-kernel - [PATCH 50/76] cpuidle: remove useless array definition in cpuidle

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Message-id: <db70b04407a63668e5fee773f76f90367492fd25.1333101989.git.len.brown@intel.com>
Date:	Fri, 30 Mar 2012 06:13:53 -0400
From:	Len Brown <lenb@...nel.org>
To:	linux-acpi@...r.kernel.org, linux-pm@...ts.linux-foundation.org
Cc:	linux-kernel@...r.kernel.org,
	Daniel Lezcano <daniel.lezcano@...aro.org>,
	Len Brown <len.brown@...el.com>
Subject: [PATCH 50/76] cpuidle: remove useless array definition in
 cpuidle_structure

From: Daniel Lezcano <daniel.lezcano@...aro.org>

All the modules name are ro-data, it is never copied to the array.

eg.

static struct cpuidle_driver intel_idle_driver = {
        .name = "intel_idle",
        .owner = THIS_MODULE,
};

It safe to assign the pointer of this ro-data to a const char *.
By this way we save 12 bytes.

Signed-off-by: Daniel Lezcano <daniel.lezcano@...aro.org>
Acked-by: Deepthi Dharwar <deepthi@...ux.vnet.ibm.com>
Tested-by: Deepthi Dharwar <deepthi@...ux.vnet.ibm.com>
Signed-off-by: Len Brown <len.brown@...el.com>
---
 include/linux/cpuidle.h |    2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/linux/cpuidle.h b/include/linux/cpuidle.h
index ca4e498..f7f1d90 100644
--- a/include/linux/cpuidle.h
+++ b/include/linux/cpuidle.h
@@ -120,7 +120,7 @@ static inline int cpuidle_get_last_residency(struct cpuidle_device *dev)
  ****************************/
 
 struct cpuidle_driver {
-	char			name[CPUIDLE_NAME_LEN];
+	const char		*name;
 	struct module 		*owner;
 
 	unsigned int		power_specified:1;
-- 
1.7.10.rc2.19.gfae9d

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