Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/roland...

[linux-2.6-omap-h63xx.git] / drivers / md / dm-snap.c

diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index 98a633f3d6b002673e17e797b34c30903a2bfa39..cee16fadd9ee70379449ce995ac4043d1ff86e5f 100644 (file)
--- a/drivers/md/dm-snap.c
+++ b/drivers/md/dm-snap.c
@@ -17,6 +17,7 @@
 #include <linux/module.h>
 #include <linux/slab.h>
 #include <linux/vmalloc.h>
+#include <linux/log2.h>
 
 #include "dm-snap.h"
 #include "dm-bio-list.h"
@@ -415,7 +416,7 @@ static int set_chunk_size(struct dm_snapshot *s, const char *chunk_size_arg,
        chunk_size = round_up(chunk_size, PAGE_SIZE >> 9);
 
        /* Check chunk_size is a power of 2 */
-       if (chunk_size & (chunk_size - 1)) {
+       if (!is_power_of_2(chunk_size)) {
                *error = "Chunk size is not a power of 2";
                return -EINVAL;
        }