From 6f3c3f0afa50782dc1742c968646c491657d255a Mon Sep 17 00:00:00 2001 From: vignesh babu Date: Fri, 19 Oct 2007 22:38:44 +0100 Subject: 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 Signed-off-by: Alasdair G Kergon --- drivers/md/dm-snap.c | 3 ++- 1 file changed, 2 insertions(+), 1 deletion(-) (limited to 'drivers/md/dm-snap.c') diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index 98a633f3d6b0..cee16fadd9ee 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -17,6 +17,7 @@ #include #include #include +#include #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; } -- cgit v1.2.3