diff --git a/drivers/mtd/devices/blkmtd.c b/drivers/mtd/devices/blkmtd.c
index 04f864d..d732532 100644
--- a/drivers/mtd/devices/blkmtd.c
+++ b/drivers/mtd/devices/blkmtd.c
@@ -29,7 +29,7 @@
 #include <linux/list.h>
 #include <linux/init.h>
 #include <linux/mtd/mtd.h>
-
+#include <linux/mutex.h>
 
 #define err(format, arg...) printk(KERN_ERR "blkmtd: " format "\n" , ## arg)
 #define info(format, arg...) printk(KERN_INFO "blkmtd: " format "\n" , ## arg)
@@ -46,7 +46,7 @@
 	struct list_head list;
 	struct block_device *blkdev;
 	struct mtd_info mtd_info;
-	struct semaphore wrbuf_mutex;
+	struct mutex wrbuf_mutex;
 };
 
 
@@ -268,7 +268,7 @@
 	if(end_len)
 		pagecnt++;
 
-	down(&dev->wrbuf_mutex);
+	mutex_lock(&dev->wrbuf_mutex);
 
 	DEBUG(3, "blkmtd: write: start_len = %zd len = %zd end_len = %zd pagecnt = %d\n",
 	      start_len, len, end_len, pagecnt);
@@ -376,7 +376,7 @@
 		blkmtd_write_out(bio);
 
 	DEBUG(2, "blkmtd: write: end, retlen = %zd, err = %d\n", *retlen, err);
-	up(&dev->wrbuf_mutex);
+	mutex_unlock(&dev->wrbuf_mutex);
 
 	if(retlen)
 		*retlen = thislen;
@@ -659,7 +659,7 @@
 	memset(dev, 0, sizeof(struct blkmtd_dev));
 	dev->blkdev = bdev;
 	if(!readonly) {
-		init_MUTEX(&dev->wrbuf_mutex);
+		mutex_init(&dev->wrbuf_mutex);
 	}
 
 	dev->mtd_info.size = dev->blkdev->bd_inode->i_size & PAGE_MASK;