From: Robert P. J. Day 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 --- drivers/md/dm-snap.c | 13 +------------ 1 files changed, 1 insertion(+), 12 deletions(-) Index: linux-2.6.24/drivers/md/dm-snap.c =================================================================== --- linux-2.6.24.orig/drivers/md/dm-snap.c 2008-02-07 13:44:24.000000000 +0000 +++ linux-2.6.24/drivers/md/dm-snap.c 2008-02-07 13:48:15.000000000 +0000 @@ -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_sn 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;