linux-kernel - [PATCH] PM / sleep: constify attribute

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Date:   Fri, 30 Jun 2017 10:22:14 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     rjw@...ysocki.net, len.brown@...el.com, pavel@....cz,
        rafael.j.wysocki@...el.com
Cc:     linux-pm@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] PM / sleep: 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
   3802	    624	     32	   4458	   116a	kernel/power/main.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   3866	    560	     32	   4458	   116a	kernel/power/main.o

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

diff --git a/kernel/power/main.c b/kernel/power/main.c
index d401c21..42bd800 100644
--- a/kernel/power/main.c
+++ b/kernel/power/main.c
@@ -705,7 +705,7 @@ static ssize_t pm_freeze_timeout_store(struct kobject *kobj,
 	NULL,
 };
 
-static struct attribute_group attr_group = {
+static const struct attribute_group attr_group = {
 	.attrs = g,
 };
 
-- 
1.9.1