[PATCH] ACPI / power: constify attribute_group structures.

[Arvind Yadav]

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
   4622     304       8    4934    1346 drivers/acpi/power.o

File size After adding 'const':
   text    data     bss     dec     hex filename
   4846      80       8    4934    1346 drivers/acpi/power.o

Signed-off-by: Arvind Yadav <arvind.yadav...@gmail.com>
---
 drivers/acpi/power.c | 10 +++++-----
 1 file changed, 5 insertions(+), 5 deletions(-)

diff --git a/drivers/acpi/power.c b/drivers/acpi/power.c
index 3a6c9b7..1b475bc 100644
--- a/drivers/acpi/power.c
+++ b/drivers/acpi/power.c
@@ -352,7 +352,7 @@ static int acpi_power_on_list(struct list_head *list)
        NULL,
 };
 
-static struct attribute_group attr_groups[] = {
+static const struct attribute_group attr_groups[] = {
        [ACPI_STATE_D0] = {
                .name = "power_resources_D0",
                .attrs = attrs,
@@ -371,14 +371,14 @@ static int acpi_power_on_list(struct list_head *list)
        },
 };
 
-static struct attribute_group wakeup_attr_group = {
+static const struct attribute_group wakeup_attr_group = {
        .name = "power_resources_wakeup",
        .attrs = attrs,
 };
 
 static void acpi_power_hide_list(struct acpi_device *adev,
                                 struct list_head *resources,
-                                struct attribute_group *attr_group)
+                                const struct attribute_group *attr_group)
 {
        struct acpi_power_resource_entry *entry;
 
@@ -397,7 +397,7 @@ static void acpi_power_hide_list(struct acpi_device *adev,
 
 static void acpi_power_expose_list(struct acpi_device *adev,
                                   struct list_head *resources,
-                                  struct attribute_group *attr_group)
+                                  const struct attribute_group *attr_group)
 {
        struct acpi_power_resource_entry *entry;
        int ret;
@@ -425,7 +425,7 @@ static void acpi_power_expose_list(struct acpi_device *adev,
 
 static void acpi_power_expose_hide(struct acpi_device *adev,
                                   struct list_head *resources,
-                                  struct attribute_group *attr_group,
+                                  const struct attribute_group *attr_group,
                                   bool expose)
 {
        if (expose)
-- 
1.9.1