diff options
| author |   Mikulas Patocka <mpatocka@redhat.com> | 2015-10-02 11:21:24 -0400 |
|---|---|---|
| committer |   Mike Snitzer <snitzer@redhat.com> | 2015-10-31 19:06:01 -0400 |
| commit | a3d939ae7b5f82688a6d3450f95286eaea338328 (patch) | |
| tree | 175d7f596c4c1a478a39cbee4a4a375fee459bf0 /drivers/md/dm-cache-policy-smq.c | |
| parent | dm: drop NULL test before kmem_cache_destroy() and mempool_destroy() (diff) | |
| download | wireguard-linux-a3d939ae7b5f82688a6d3450f95286eaea338328.tar.xz wireguard-linux-a3d939ae7b5f82688a6d3450f95286eaea338328.zip | |
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.c | 2 |
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) |