1 files changed, 5 insertions, 5 deletions

diff --git a/drivers/mmc/card/block.c b/drivers/mmc/card/block.c
index d545f79f6000..00073b7c0368 100644
--- a/drivers/mmc/card/block.c
+++ b/drivers/mmc/card/block.c
@@ -29,7 +29,6 @@
 #include <linux/kdev_t.h>
 #include <linux/blkdev.h>
 #include <linux/mutex.h>
-#include <linux/smp_lock.h>
 #include <linux/scatterlist.h>
 #include <linux/string_helpers.h>
 
@@ -51,6 +50,7 @@ MODULE_ALIAS("mmc:block");
 #define MMC_SHIFT       3
 #define MMC_NUM_MINORS  (256 >> MMC_SHIFT)
 
+static DEFINE_MUTEX(block_mutex);
 static DECLARE_BITMAP(dev_use, MMC_NUM_MINORS);
 
 /*
@@ -108,7 +108,7 @@ static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
         struct mmc_blk_data *md = mmc_blk_get(bdev->bd_disk);
         int ret = -ENXIO;
 
-        lock_kernel();
+        mutex_lock(&block_mutex);
         if (md) {
                 if (md->usage == 2)
                         check_disk_change(bdev);
@@ -119,7 +119,7 @@ static int mmc_blk_open(struct block_device *bdev, fmode_t mode)
                         ret = -EROFS;
                 }
         }
-        unlock_kernel();
+        mutex_unlock(&block_mutex);
 
         return ret;
 }
@@ -128,9 +128,9 @@ static int mmc_blk_release(struct gendisk *disk, fmode_t mode)
 {
         struct mmc_blk_data *md = disk->private_data;
 
-        lock_kernel();
+        mutex_lock(&block_mutex);
         mmc_blk_put(md);
-        unlock_kernel();
+        mutex_unlock(&block_mutex);
         return 0;
 }