[PATCH] ALSA: pcm: constify attribute_group structures.

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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
   9781	    240	      8	  10029	   272d	sound/core/pcm.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
   9813	    176	      8	   9997	   270d	sound/core/pcm.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
---
 sound/core/pcm.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/sound/core/pcm.c b/sound/core/pcm.c
index 8e980aa..ee3e8db0 100644
--- a/sound/core/pcm.c
+++ b/sound/core/pcm.c
@@ -1056,7 +1056,7 @@ static ssize_t show_pcm_class(struct device *dev,
 	NULL
 };
 
-static struct attribute_group pcm_dev_attr_group = {
+static const struct attribute_group pcm_dev_attr_group = {
 	.attrs	= pcm_dev_attrs,
 };
 
-- 
1.9.1

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