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-mq.c | |
| parent | 6f65985e2636c0b170eade6a72d216632f065e26 (diff) | |
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-mq.c')
| -rw-r--r-- | drivers/md/dm-cache-policy-mq.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-cache-policy-mq.c b/drivers/md/dm-cache-policy-mq.c index aa1b41ca40f7..ddb26980cd66 100644 --- a/drivers/md/dm-cache-policy-mq.c +++ b/drivers/md/dm-cache-policy-mq.c @@ -1410,7 +1410,7 @@ static struct dm_cache_policy *mq_create(dm_cblock_t cache_size, mq->generation_period = max((unsigned) from_cblock(cache_size), 1024U); mq->nr_buckets = next_power(from_cblock(cache_size) / 2, 16); - mq->hash_bits = ffs(mq->nr_buckets) - 1; + mq->hash_bits = __ffs(mq->nr_buckets); mq->table = vzalloc(sizeof(*mq->table) * mq->nr_buckets); if (!mq->table) goto bad_alloc_table; |