diff --git a/drivers/scsi/osst.c b/drivers/scsi/osst.c
index 278b352..54de1d1 100644
--- a/drivers/scsi/osst.c
+++ b/drivers/scsi/osst.c
@@ -51,7 +51,7 @@
 #include <linux/moduleparam.h>
 #include <linux/delay.h>
 #include <linux/jiffies.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
 #include <asm/uaccess.h>
 #include <asm/dma.h>
 #include <asm/system.h>
@@ -80,6 +80,7 @@
 #include "osst_options.h"
 #include "osst_detect.h"
 
+static DEFINE_MUTEX(osst_int_mutex);
 static int max_dev = 0;
 static int write_threshold_kbs = 0;
 static int max_sg_segs = 0;
@@ -4807,9 +4808,9 @@
 {
 	int ret;
 
-	lock_kernel();
+	mutex_lock(&osst_int_mutex);
 	ret = __os_scsi_tape_open(inode, filp);
-	unlock_kernel();
+	mutex_unlock(&osst_int_mutex);
 	return ret;
 }
 
@@ -4943,9 +4944,9 @@
 	char		    * name  = tape_name(STp);
 	void	    __user  * p     = (void __user *)arg;
 
-	lock_kernel();
+	mutex_lock(&osst_int_mutex);
 	if (mutex_lock_interruptible(&STp->lock)) {
-		unlock_kernel();
+		mutex_unlock(&osst_int_mutex);
 		return -ERESTARTSYS;
 	}
 
@@ -5260,14 +5261,14 @@
 	mutex_unlock(&STp->lock);
 
 	retval = scsi_ioctl(STp->device, cmd_in, p);
-	unlock_kernel();
+	mutex_unlock(&osst_int_mutex);
 	return retval;
 
 out:
 	if (SRpnt) osst_release_request(SRpnt);
 
 	mutex_unlock(&STp->lock);
-	unlock_kernel();
+	mutex_unlock(&osst_int_mutex);
 
 	return retval;
 }