1 files changed, 6 insertions, 6 deletions

diff --git a/drivers/scsi/st.c b/drivers/scsi/st.c
index 9e2c3a72ff4d..5b7388f1c835 100644
--- a/drivers/scsi/st.c
+++ b/drivers/scsi/st.c
@@ -39,7 +39,6 @@ static const char *verstr = "20100829";
 #include <linux/cdev.h>
 #include <linux/delay.h>
 #include <linux/mutex.h>
-#include <linux/smp_lock.h>
 
 #include <asm/uaccess.h>
 #include <asm/dma.h>
@@ -76,6 +75,7 @@ static const char *verstr = "20100829";
 #include "st_options.h"
 #include "st.h"
 
+static DEFINE_MUTEX(st_mutex);
 static int buffer_kbs;
 static int max_sg_segs;
 static int try_direct_io = TRY_DIRECT_IO;
@@ -1180,7 +1180,7 @@ static int st_open(struct inode *inode, struct file *filp)
         int dev = TAPE_NR(inode);
         char *name;
 
-        lock_kernel();
+        mutex_lock(&st_mutex);
         /*
          * We really want to do nonseekable_open(inode, filp); here, but some
          * versions of tar incorrectly call lseek on tapes and bail out if that
@@ -1189,7 +1189,7 @@ static int st_open(struct inode *inode, struct file *filp)
         filp->f_mode &= ~(FMODE_PREAD | FMODE_PWRITE);
 
         if (!(STp = scsi_tape_get(dev))) {
-                unlock_kernel();
+                mutex_unlock(&st_mutex);
                 return -ENXIO;
         }
 
@@ -1200,7 +1200,7 @@ static int st_open(struct inode *inode, struct file *filp)
         if (STp->in_use) {
                 write_unlock(&st_dev_arr_lock);
                 scsi_tape_put(STp);
-                unlock_kernel();
+                mutex_unlock(&st_mutex);
                 DEB( printk(ST_DEB_MSG "%s: Device already in use.\n", name); )
                 return (-EBUSY);
         }
@@ -1249,14 +1249,14 @@ static int st_open(struct inode *inode, struct file *filp)
                         retval = (-EIO);
                 goto err_out;
         }
-        unlock_kernel();
+        mutex_unlock(&st_mutex);
         return 0;
 
  err_out:
         normalize_buffer(STp->buffer);
         STp->in_use = 0;
         scsi_tape_put(STp);
-        unlock_kernel();
+        mutex_unlock(&st_mutex);
         return retval;
 
 }