linux-kernel - [PATCH] power: supply: constify attribute

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Date:   Wed, 12 Jul 2017 17:13:22 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     sre@...nel.org, sebastian.reichel@...labora.co.uk
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] power: supply: constify attribute_group structures.

attribute_groups are not supposed to change at runtime. All functions
working with attribute_groups provided by <linux/sysfs.h> work
with const attribute_group. So mark the non-const structs as const.

File size before:
   text	   data	    bss	    dec	    hex	filename
   2673	    400	      0	   3073	    c01	power/supply/pcf50633-charger.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   2737	    336	      0	   3073	    bed	power/supply/pcf50633-charger.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 drivers/power/supply/pcf50633-charger.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/power/supply/pcf50633-charger.c b/drivers/power/supply/pcf50633-charger.c
index b3c1873..1ad7ccc 100644
--- a/drivers/power/supply/pcf50633-charger.c
+++ b/drivers/power/supply/pcf50633-charger.c
@@ -254,7 +254,7 @@ static ssize_t set_chglim(struct device *dev,
 	NULL,
 };

-static struct attribute_group mbc_attr_group = {
+static const struct attribute_group mbc_attr_group = {
 	.name	= NULL,			/* put in device directory */
 	.attrs	= pcf50633_mbc_sysfs_entries,
 };
-- 
1.9.1