1 files changed, 4 insertions, 4 deletions

diff --git a/drivers/scsi/ch.c b/drivers/scsi/ch.c
index d6532187f616..e805c8fda239 100644
--- a/drivers/scsi/ch.c
+++ b/drivers/scsi/ch.c
@@ -22,7 +22,6 @@
 #include <linux/chio.h>                 /* here are all the ioctls */
 #include <linux/mutex.h>
 #include <linux/idr.h>
-#include <linux/smp_lock.h>
 #include <linux/slab.h>
 
 #include <scsi/scsi.h>
@@ -44,6 +43,7 @@ MODULE_LICENSE("GPL");
 MODULE_ALIAS_CHARDEV_MAJOR(SCSI_CHANGER_MAJOR);
 MODULE_ALIAS_SCSI_DEVICE(TYPE_MEDIUM_CHANGER);
 
+static DEFINE_MUTEX(ch_mutex);
 static int init = 1;
 module_param(init, int, 0444);
 MODULE_PARM_DESC(init, \
@@ -581,19 +581,19 @@ ch_open(struct inode *inode, struct file *file)
         scsi_changer *ch;
         int minor = iminor(inode);
 
-        lock_kernel();
+        mutex_lock(&ch_mutex);
         spin_lock(&ch_index_lock);
         ch = idr_find(&ch_index_idr, minor);
 
         if (NULL == ch || scsi_device_get(ch->device)) {
                 spin_unlock(&ch_index_lock);
-                unlock_kernel();
+                mutex_unlock(&ch_mutex);
                 return -ENXIO;
         }
         spin_unlock(&ch_index_lock);
 
         file->private_data = ch;
-        unlock_kernel();
+        mutex_unlock(&ch_mutex);
         return 0;
 }