From a3d939ae7b5f82688a6d3450f95286eaea338328 Mon Sep 17 00:00:00 2001 From: Mikulas Patocka Date: Fri, 2 Oct 2015 11:21:24 -0400 Subject: dm: convert ffs to __ffs ffs counts bit starting with 1 (for the least significant bit), __ffs counts bits starting with 0. This patch changes various occurrences of ffs to __ffs and removes subtraction of 1 from the result. Note that __ffs (unlike ffs) is not defined when called with zero argument, but it is not called with zero argument in any of these cases. Signed-off-by: Mikulas Patocka Signed-off-by: Mike Snitzer --- drivers/md/dm-region-hash.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'drivers/md/dm-region-hash.c') diff --git a/drivers/md/dm-region-hash.c b/drivers/md/dm-region-hash.c index f3d608bedffe..74cb7b991d41 100644 --- a/drivers/md/dm-region-hash.c +++ b/drivers/md/dm-region-hash.c @@ -193,7 +193,7 @@ struct dm_region_hash *dm_region_hash_create( rh->max_recovery = max_recovery; rh->log = log; rh->region_size = region_size; - rh->region_shift = ffs(region_size) - 1; + rh->region_shift = __ffs(region_size); rwlock_init(&rh->hash_lock); rh->mask = nr_buckets - 1; rh->nr_buckets = nr_buckets; -- cgit v1.2.3