1 files changed, 6 insertions, 3 deletions

diff --git a/drivers/acpi/battery.c b/drivers/acpi/battery.c
index 24bf4dca88cc..9810e2a55d0a 100644
--- a/drivers/acpi/battery.c
+++ b/drivers/acpi/battery.c
@@ -557,7 +557,7 @@ static int acpi_battery_alarm_open_fs(struct inode *inode, struct file *file)
         return single_open(file, acpi_battery_read_alarm, PDE(inode)->data);
 }
 
-static struct file_operations acpi_battery_info_ops = {
+static const struct file_operations acpi_battery_info_ops = {
         .open = acpi_battery_info_open_fs,
         .read = seq_read,
         .llseek = seq_lseek,
@@ -565,7 +565,7 @@ static struct file_operations acpi_battery_info_ops = {
         .owner = THIS_MODULE,
 };
 
-static struct file_operations acpi_battery_state_ops = {
+static const struct file_operations acpi_battery_state_ops = {
         .open = acpi_battery_state_open_fs,
         .read = seq_read,
         .llseek = seq_lseek,
@@ -573,7 +573,7 @@ static struct file_operations acpi_battery_state_ops = {
         .owner = THIS_MODULE,
 };
 
-static struct file_operations acpi_battery_alarm_ops = {
+static const struct file_operations acpi_battery_alarm_ops = {
         .open = acpi_battery_alarm_open_fs,
         .read = seq_read,
         .write = acpi_battery_write_alarm,
@@ -757,6 +757,9 @@ static int __init acpi_battery_init(void)
 {
         int result;
 
+        if (acpi_disabled)
+                return -ENODEV;
+
         acpi_battery_dir = acpi_lock_battery_dir();
         if (!acpi_battery_dir)
                 return -ENODEV;