cpu/hotplug: Constify attribute_group structures
authorArvind Yadav <arvind.yadav.cs@gmail.com>
Thu, 29 Jun 2017 12:10:47 +0000 (17:40 +0530)
committerIngo Molnar <mingo@kernel.org>
Fri, 30 Jun 2017 07:34:39 +0000 (09:34 +0200)
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@gmail.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Cc: anna-maria@linutronix.de
Cc: bigeasy@linutronix.de
Cc: boris.ostrovsky@oracle.com
Cc: rcochran@linutronix.de
Link: http://lkml.kernel.org/r/f9079e94e12b36d245e7adbf67d312bc5d0250c6.1498737970.git.arvind.yadav.cs@gmail.com
Signed-off-by: Ingo Molnar <mingo@kernel.org>
kernel/cpu.c

index d0f5f54aa0870f304d0cd07282a7914001cc9904..b69c0588f8c9ccbece87abcd4419cf657a2c31e4 100644 (file)
@@ -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