1 files changed, 8 insertions, 7 deletions

diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c
index a825002123c8..5ef45487b65f 100644
--- a/drivers/mtd/mtdchar.c
+++ b/drivers/mtd/mtdchar.c
@@ -26,7 +26,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/sched.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
 #include <linux/backing-dev.h>
 #include <linux/compat.h>
 #include <linux/mount.h>
@@ -37,6 +37,7 @@
 #include <asm/uaccess.h>
 
 #define MTD_INODE_FS_MAGIC 0x11307854
+static DEFINE_MUTEX(mtd_mutex);
 static struct vfsmount *mtd_inode_mnt __read_mostly;
 
 /*
@@ -90,7 +91,7 @@ static int mtd_open(struct inode *inode, struct file *file)
         if ((file->f_mode & FMODE_WRITE) && (minor & 1))
                 return -EACCES;
 
-        lock_kernel();
+        mutex_lock(&mtd_mutex);
         mtd = get_mtd_device(NULL, devnum);
 
         if (IS_ERR(mtd)) {
@@ -138,7 +139,7 @@ static int mtd_open(struct inode *inode, struct file *file)
         file->private_data = mfi;
 
 out:
-        unlock_kernel();
+        mutex_unlock(&mtd_mutex);
         return ret;
 } /* mtd_open */
 
@@ -866,9 +867,9 @@ static long mtd_unlocked_ioctl(struct file *file, u_int cmd, u_long arg)
 {
         int ret;
 
-        lock_kernel();
+        mutex_lock(&mtd_mutex);
         ret = mtd_ioctl(file, cmd, arg);
-        unlock_kernel();
+        mutex_unlock(&mtd_mutex);
 
         return ret;
 }
@@ -892,7 +893,7 @@ static long mtd_compat_ioctl(struct file *file, unsigned int cmd,
         void __user *argp = compat_ptr(arg);
         int ret = 0;
 
-        lock_kernel();
+        mutex_lock(&mtd_mutex);
 
         switch (cmd) {
         case MEMWRITEOOB32:
@@ -927,7 +928,7 @@ static long mtd_compat_ioctl(struct file *file, unsigned int cmd,
                 ret = mtd_ioctl(file, cmd, (unsigned long)argp);
         }
 
-        unlock_kernel();
+        mutex_unlock(&mtd_mutex);
 
         return ret;
 }