diff --git a/[refs] b/[refs]
index 5bb44c225773..cab678fcc9b6 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: b8c71d7ae2a7f723d171d9175212b6d0a727655d
+refs/heads/master: c0bed680f0ca603864375ed5f9fed4296a53aa62
diff --git a/trunk/drivers/char/raw.c b/trunk/drivers/char/raw.c
index bbfa0e241cba..505fcbe884a4 100644
--- a/trunk/drivers/char/raw.c
+++ b/trunk/drivers/char/raw.c
@@ -19,6 +19,7 @@
 #include <linux/cdev.h>
 #include <linux/device.h>
 #include <linux/mutex.h>
+#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 
@@ -53,6 +54,7 @@ static int raw_open(struct inode *inode, struct file *filp)
 		return 0;
 	}
 
+	lock_kernel();
 	mutex_lock(&raw_mutex);
 
 	/*
@@ -79,6 +81,7 @@ static int raw_open(struct inode *inode, struct file *filp)
 			bdev->bd_inode->i_mapping;
 	filp->private_data = bdev;
 	mutex_unlock(&raw_mutex);
+	unlock_kernel();
 	return 0;
 
 out2: