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| author | vignesh babu <vignesh.babu@wipro.com> | 2007-10-19 22:38:44 +0100 |
|---|---|---|
| committer | Alasdair G Kergon <agk@redhat.com> | 2007-10-20 02:01:06 +0100 |
| commit | 6f3c3f0afa50782dc1742c968646c491657d255a (patch) | |
| tree | cb1f69504094cec60564be51c405bba5eb66c322 /drivers/md/dm-raid1.c | |
| parent | ae9da83f6d800fe1f3b23bfbc8f7222ad1c5bb74 (diff) | |
| download | linux-6f3c3f0afa50782dc1742c968646c491657d255a.tar.bz2 | |
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-raid1.c')
| -rw-r--r-- | drivers/md/dm-raid1.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/md/dm-raid1.c b/drivers/md/dm-raid1.c index 6f60f307fae2..2b2ca371e20b 100644 --- a/drivers/md/dm-raid1.c +++ b/drivers/md/dm-raid1.c @@ -19,6 +19,7 @@ #include <linux/time.h> #include <linux/vmalloc.h> #include <linux/workqueue.h> +#include <linux/log2.h> #define DM_MSG_PREFIX "raid1" #define DM_IO_PAGES 64 @@ -995,7 +996,7 @@ static void free_context(struct mirror_set *ms, struct dm_target *ti, static inline int _check_region_size(struct dm_target *ti, uint32_t size) { - return !(size % (PAGE_SIZE >> 9) || (size & (size - 1)) || + return !(size % (PAGE_SIZE >> 9) || !is_power_of_2(size) || size > ti->len); } |