From: Robert P. J. Day Date: Fri, 8 Feb 2008 02:10:06 +0000 (+0000) Subject: dm snapshot: use rounddown_pow_of_two X-Git-Tag: v2.6.25-rc1~280^2~36 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=8defd83084c3ce46d314c038f7c0f0ed7156d6f8;p=platform%2Fkernel%2Flinux-stable.git dm snapshot: use rounddown_pow_of_two Since the source file already includes the log2.h header file, it seems pointless to re-invent the necessary routine. Signed-off-by: Robert P. J. Day Signed-off-by: Alasdair G Kergon --- diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c index cee16fa..fad8465 100644 --- a/drivers/md/dm-snap.c +++ b/drivers/md/dm-snap.c @@ -334,16 +334,6 @@ static int calc_max_buckets(void) } /* - * Rounds a number down to a power of 2. - */ -static uint32_t round_down(uint32_t n) -{ - while (n & (n - 1)) - n &= (n - 1); - return n; -} - -/* * Allocate room for a suitable hash table. */ static int init_hash_tables(struct dm_snapshot *s) @@ -361,8 +351,7 @@ static int init_hash_tables(struct dm_snapshot *s) hash_size = min(origin_dev_size, cow_dev_size) >> s->chunk_shift; hash_size = min(hash_size, max_buckets); - /* Round it down to a power of 2 */ - hash_size = round_down(hash_size); + hash_size = rounddown_pow_of_two(hash_size); if (init_exception_table(&s->complete, hash_size)) return -ENOMEM;