linux-kernel - [PATCH 5/7] x86: ksysfs: constify attribute

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Date:   Thu, 20 Jul 2017 12:51:43 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     tglx@...utronix.de, mingo@...hat.com, hpa@...or.com,
        x86@...nel.org, bp@...en8.de, tony.luck@...el.com
Cc:     linux-kernel@...r.kernel.org
Subject: [PATCH 5/7] x86: ksysfs: constify attribute_group structures.

attribute_group are not supposed to change at runtime. All functions
working with attribute_group 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
   1183	    384	      0	   1567	    61f	arch/x86/kernel/ksysfs.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   1311	    256	      0	   1567	    61f	arch/x86/kernel/ksysfs.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 arch/x86/kernel/ksysfs.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/arch/x86/kernel/ksysfs.c b/arch/x86/kernel/ksysfs.c
index 4afc67f..06e1ff5 100644
--- a/arch/x86/kernel/ksysfs.c
+++ b/arch/x86/kernel/ksysfs.c
@@ -55,7 +55,7 @@ static ssize_t boot_params_data_read(struct file *fp, struct kobject *kobj,
 	NULL,
 };
 
-static struct attribute_group boot_params_attr_group = {
+static const struct attribute_group boot_params_attr_group = {
 	.attrs = boot_params_version_attrs,
 	.bin_attrs = boot_params_data_attrs,
 };
@@ -202,7 +202,7 @@ static ssize_t setup_data_data_read(struct file *fp,
 	NULL,
 };
 
-static struct attribute_group setup_data_attr_group = {
+static const struct attribute_group setup_data_attr_group = {
 	.attrs = setup_data_type_attrs,
 	.bin_attrs = setup_data_data_attrs,
 };
-- 
1.9.1