dm: use is_power_of_2

Replacing n & (n - 1) for power of 2 check by is_power_of_2(n)

Signed-off-by: vignesh babu <vignesh.babu@wipro.com>
Signed-off-by: Alasdair G Kergon <agk@redhat.com>

1 files changed, 2 insertions, 1 deletions

diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index 51f5e0760012..969944a8aba2 100644
--- a/drivers/md/dm-stripe.c
+++ b/drivers/md/dm-stripe.c
@@ -11,6 +11,7 @@
 #include <linux/blkdev.h>
 #include <linux/bio.h>
 #include <linux/slab.h>
+#include <linux/log2.h>
 
 #define DM_MSG_PREFIX "striped"
 
@@ -99,7 +100,7 @@ static int stripe_ctr(struct dm_target *ti, unsigned int argc, char **argv)
         /*
          * chunk_size is a power of two
          */
-        if (!chunk_size || (chunk_size & (chunk_size - 1)) ||
+        if (!is_power_of_2(chunk_size) ||
             (chunk_size < (PAGE_SIZE >> SECTOR_SHIFT))) {
                 ti->error = "Invalid chunk size";
                 return -EINVAL;