1 files changed, 7 insertions, 4 deletions

diff --git a/kernel/power/user.c b/kernel/power/user.c
index f5512cb3aa86..658262b15994 100644
--- a/kernel/power/user.c
+++ b/kernel/power/user.c
@@ -23,6 +23,7 @@
 #include <linux/console.h>
 #include <linux/cpu.h>
 #include <linux/freezer.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 
@@ -164,8 +165,8 @@ static ssize_t snapshot_write(struct file *filp, const char __user *buf,
         return res;
 }
 
-static int snapshot_ioctl(struct inode *inode, struct file *filp,
-                          unsigned int cmd, unsigned long arg)
+static long snapshot_ioctl(struct file *filp, unsigned int cmd,
+                                                        unsigned long arg)
 {
         int error = 0;
         struct snapshot_data *data;
@@ -181,6 +182,8 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
 
         data = filp->private_data;
 
+        lock_kernel();
+
         switch (cmd) {
 
         case SNAPSHOT_FREEZE:
@@ -389,7 +392,7 @@ static int snapshot_ioctl(struct inode *inode, struct file *filp,
                 error = -ENOTTY;
 
         }
-
+        unlock_kernel();
         return error;
 }
 
@@ -399,7 +402,7 @@ static const struct file_operations snapshot_fops = {
         .read = snapshot_read,
         .write = snapshot_write,
         .llseek = no_llseek,
-        .ioctl = snapshot_ioctl,
+        .unlocked_ioctl = snapshot_ioctl,
 };
 
 static struct miscdevice snapshot_device = {