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path: root/drivers/block/brd.c
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Diffstat (limited to 'drivers/block/brd.c')
-rw-r--r--drivers/block/brd.c7
1 files changed, 4 insertions, 3 deletions
diff --git a/drivers/block/brd.c b/drivers/block/brd.c
index 1c7f63792ff8..82bfd5bb4a97 100644
--- a/drivers/block/brd.c
+++ b/drivers/block/brd.c
@@ -15,7 +15,7 @@
#include <linux/blkdev.h>
#include <linux/bio.h>
#include <linux/highmem.h>
-#include <linux/smp_lock.h>
+#include <linux/mutex.h>
#include <linux/radix-tree.h>
#include <linux/buffer_head.h> /* invalidate_bh_lrus() */
#include <linux/slab.h>
@@ -55,6 +55,7 @@ struct brd_device {
/*
* Look up and return a brd's page for a given sector.
*/
+static DEFINE_MUTEX(brd_mutex);
static struct page *brd_lookup_page(struct brd_device *brd, sector_t sector)
{
pgoff_t idx;
@@ -402,7 +403,7 @@ static int brd_ioctl(struct block_device *bdev, fmode_t mode,
* ram device BLKFLSBUF has special semantics, we want to actually
* release and destroy the ramdisk data.
*/
- lock_kernel();
+ mutex_lock(&brd_mutex);
mutex_lock(&bdev->bd_mutex);
error = -EBUSY;
if (bdev->bd_openers <= 1) {
@@ -419,7 +420,7 @@ static int brd_ioctl(struct block_device *bdev, fmode_t mode,
error = 0;
}
mutex_unlock(&bdev->bd_mutex);
- unlock_kernel();
+ mutex_unlock(&brd_mutex);
return error;
}