linux-kernel - [PATCH] drm: i915: sysfs: constify attribute

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Date:   Mon,  3 Jul 2017 16:38:25 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     daniel.vetter@...el.com, jani.nikula@...ux.intel.com,
        airlied@...ux.ie
Cc:     intel-gfx@...ts.freedesktop.org, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org
Subject: [PATCH] drm: i915: sysfs: 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
   4028	   1088	      0	   5116	   13fc	drivers/gpu/drm/i915/i915_sysfs.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   4196	    928	      0	   5124	   1404	drivers/gpu/drm/i915/i915_sysfs.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@...il.com>
---
 drivers/gpu/drm/i915/i915_sysfs.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_sysfs.c b/drivers/gpu/drm/i915/i915_sysfs.c
index f3fdfda..8e55a8f 100644
--- a/drivers/gpu/drm/i915/i915_sysfs.c
+++ b/drivers/gpu/drm/i915/i915_sysfs.c
@@ -96,7 +96,7 @@ static u32 calc_residency(struct drm_i915_private *dev_priv,
 	NULL
 };
 
-static struct attribute_group rc6_attr_group = {
+static const struct attribute_group rc6_attr_group = {
 	.name = power_group_name,
 	.attrs =  rc6_attrs
 };
@@ -107,7 +107,7 @@ static u32 calc_residency(struct drm_i915_private *dev_priv,
 	NULL
 };
 
-static struct attribute_group rc6p_attr_group = {
+static const struct attribute_group rc6p_attr_group = {
 	.name = power_group_name,
 	.attrs =  rc6p_attrs
 };
@@ -117,7 +117,7 @@ static u32 calc_residency(struct drm_i915_private *dev_priv,
 	NULL
 };
 
-static struct attribute_group media_rc6_attr_group = {
+static const struct attribute_group media_rc6_attr_group = {
 	.name = power_group_name,
 	.attrs =  media_rc6_attrs
 };
-- 
1.9.1