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authorvignesh babu <vignesh.babu@wipro.com>2007-10-19 22:38:44 +0100
committerAlasdair G Kergon <agk@redhat.com>2007-10-20 02:01:06 +0100
commit6f3c3f0afa50782dc1742c968646c491657d255a (patch)
treecb1f69504094cec60564be51c405bba5eb66c322 /drivers/md/dm-stripe.c
parentae9da83f6d800fe1f3b23bfbc8f7222ad1c5bb74 (diff)
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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>
Diffstat (limited to 'drivers/md/dm-stripe.c')
-rw-r--r--drivers/md/dm-stripe.c3
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/dm-stripe.c b/drivers/md/dm-stripe.c
index 51f5e07..969944a 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;