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authorMikulas Patocka <mpatocka@redhat.com>2015-10-02 18:21:24 +0300
committerMike Snitzer <snitzer@redhat.com>2015-11-01 02:06:01 +0300
commita3d939ae7b5f82688a6d3450f95286eaea338328 (patch)
tree175d7f596c4c1a478a39cbee4a4a375fee459bf0 /drivers/md/dm-cache-policy-smq.c
parent6f65985e2636c0b170eade6a72d216632f065e26 (diff)
downloadlinux-a3d939ae7b5f82688a6d3450f95286eaea338328.tar.xz
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 <mpatocka@redhat.com> Signed-off-by: Mike Snitzer <snitzer@redhat.com>
Diffstat (limited to 'drivers/md/dm-cache-policy-smq.c')
-rw-r--r--drivers/md/dm-cache-policy-smq.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-cache-policy-smq.c b/drivers/md/dm-cache-policy-smq.c
index 1ffbeb1b3ea6..28d4586748d0 100644
--- a/drivers/md/dm-cache-policy-smq.c
+++ b/drivers/md/dm-cache-policy-smq.c
@@ -566,7 +566,7 @@ static int h_init(struct hash_table *ht, struct entry_space *es, unsigned nr_ent
ht->es = es;
nr_buckets = roundup_pow_of_two(max(nr_entries / 4u, 16u));
- ht->hash_bits = ffs(nr_buckets) - 1;
+ ht->hash_bits = __ffs(nr_buckets);
ht->buckets = vmalloc(sizeof(*ht->buckets) * nr_buckets);
if (!ht->buckets)