linux-kernel - [PATCH] ALSA: hda: constify attribute

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Date:   Thu, 29 Jun 2017 16:07:01 +0530
From:   Arvind Yadav <arvind.yadav.cs@...il.com>
To:     perex@...ex.cz, tiwai@...e.com
Cc:     alsa-devel@...a-project.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ALSA: hda: constify attribute_group structures.

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

File size before:
   text	   data	    bss	    dec	    hex	filename
    995	    608	      0	   1603	    643	sound/pci/hda/hda_sysfs.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   1035	    544	      0	   1579	    62b	sound/pci/hda/hda_sysfs.o

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

diff --git a/sound/pci/hda/hda_sysfs.c b/sound/pci/hda/hda_sysfs.c
index 9739fce..9b7efec 100644
--- a/sound/pci/hda/hda_sysfs.c
+++ b/sound/pci/hda/hda_sysfs.c
@@ -761,7 +761,7 @@ int snd_hda_load_patch(struct hda_bus *bus, size_t fw_size, const void *fw_buf)
 	NULL
 };

-static struct attribute_group hda_dev_attr_group = {
+static const struct attribute_group hda_dev_attr_group = {
 	.attrs	= hda_dev_attrs,
 };

-- 
1.9.1