[tip:smp/hotplug] cpu/hotplug: Constify attribute_group structures

[tip-bot for Arvind Yadav]

Commit-ID:  993647a293814dd47ae41d38657fda6e4ab04e33
Gitweb:     http://git.kernel.org/tip/993647a293814dd47ae41d38657fda6e4ab04e33
Author:     Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
AuthorDate: Thu, 29 Jun 2017 17:40:47 +0530
Committer:  Ingo Molnar <mingo@xxxxxxxxxx>
CommitDate: Fri, 30 Jun 2017 09:34:39 +0200

cpu/hotplug: 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
  12582	  15361	     20	  27963	   6d3b	kernel/cpu.o

File size After adding 'const':
   text	   data	    bss	    dec	    hex	filename
  12710	  15265	     20	  27995	   6d5b	kernel/cpu.o

Signed-off-by: Arvind Yadav <arvind.yadav.cs@xxxxxxxxx>
Cc: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxx>
Cc: Peter Zijlstra <peterz@xxxxxxxxxxxxx>
Cc: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
Cc: anna-maria@xxxxxxxxxxxxx
Cc: bigeasy@xxxxxxxxxxxxx
Cc: boris.ostrovsky@xxxxxxxxxx
Cc: rcochran@xxxxxxxxxxxxx
Link: http://lkml.kernel.org/r/f9079e94e12b36d245e7adbf67d312bc5d0250c6.1498737970.git.arvind.yadav.cs@xxxxxxxxx
Signed-off-by: Ingo Molnar <mingo@xxxxxxxxxx>
---
 kernel/cpu.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/kernel/cpu.c b/kernel/cpu.c
index d0f5f54..b69c058 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -1629,7 +1629,7 @@ static struct attribute *cpuhp_cpu_attrs[] = {
 	NULL
 };
 
-static struct attribute_group cpuhp_cpu_attr_group = {
+static const struct attribute_group cpuhp_cpu_attr_group = {
 	.attrs = cpuhp_cpu_attrs,
 	.name = "hotplug",
 	NULL
@@ -1661,7 +1661,7 @@ static struct attribute *cpuhp_cpu_root_attrs[] = {
 	NULL
 };
 
-static struct attribute_group cpuhp_cpu_root_attr_group = {
+static const struct attribute_group cpuhp_cpu_root_attr_group = {
 	.attrs = cpuhp_cpu_root_attrs,
 	.name = "hotplug",
 	NULL