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authorRobert P. J. Day <rpjday@crashcourse.ca>2008-02-08 02:10:06 +0000
committerAlasdair G Kergon <agk@redhat.com>2008-02-08 02:10:06 +0000
commit8defd83084c3ce46d314c038f7c0f0ed7156d6f8 (patch)
treec21d30f80f0d991e731ba9a2c1263c5dbe498e6e /drivers/md/dm-snap.c
parent82d601dc076deb5f348cc3a70f57248bc976ae0c (diff)
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 <rpjday@crashcourse.ca> Signed-off-by: Alasdair G Kergon <agk@redhat.com>
Diffstat (limited to 'drivers/md/dm-snap.c')
-rw-r--r--drivers/md/dm-snap.c13
1 files changed, 1 insertions, 12 deletions
diff --git a/drivers/md/dm-snap.c b/drivers/md/dm-snap.c
index cee16fadd9e..fad84654b04 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;