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dm: use is_power_of_2

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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>
This commit is contained in:
vignesh babu
2007-10-19 22:38:44 +01:00
committed by Alasdair G Kergon
parent ae9da83f6d
commit 6f3c3f0afa
3 changed files with 6 additions and 3 deletions
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3
drivers/md/dm-stripe.c
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@@ -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;