diff --git a/drivers/mtd/mtdblock.c b/drivers/mtd/mtdblock.c
index e847566..2cef280 100644
--- a/drivers/mtd/mtdblock.c
+++ b/drivers/mtd/mtdblock.c
@@ -19,11 +19,13 @@
 
 #include <linux/mtd/mtd.h>
 #include <linux/mtd/blktrans.h>
+#include <linux/mutex.h>
+
 
 static struct mtdblk_dev {
 	struct mtd_info *mtd;
 	int count;
-	struct semaphore cache_sem;
+	struct mutex cache_mutex;
 	unsigned char *cache_data;
 	unsigned long cache_offset;
 	unsigned int cache_size;
@@ -284,7 +286,7 @@
 	mtdblk->count = 1;
 	mtdblk->mtd = mtd;
 
-	init_MUTEX (&mtdblk->cache_sem);
+	mutex_init(&mtdblk->cache_mutex);
 	mtdblk->cache_state = STATE_EMPTY;
 	if ((mtdblk->mtd->flags & MTD_CAP_RAM) != MTD_CAP_RAM &&
 	    mtdblk->mtd->erasesize) {
@@ -306,9 +308,9 @@
 
    	DEBUG(MTD_DEBUG_LEVEL1, "mtdblock_release\n");
 
-	down(&mtdblk->cache_sem);
+	mutex_lock(&mtdblk->cache_mutex);
 	write_cached_data(mtdblk);
-	up(&mtdblk->cache_sem);
+	mutex_unlock(&mtdblk->cache_mutex);
 
 	if (!--mtdblk->count) {
 		/* It was the last usage. Free the device */
@@ -327,9 +329,9 @@
 {
 	struct mtdblk_dev *mtdblk = mtdblks[dev->devnum];
 
-	down(&mtdblk->cache_sem);
+	mutex_lock(&mtdblk->cache_mutex);
 	write_cached_data(mtdblk);
-	up(&mtdblk->cache_sem);
+	mutex_unlock(&mtdblk->cache_mutex);
 
 	if (mtdblk->mtd->sync)
 		mtdblk->mtd->sync(mtdblk->mtd);