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| author | Mikulas Patocka <mpatocka@redhat.com> | 2015-10-02 17:21:24 +0200 |
|---|---|---|
| committer | Mike Snitzer <snitzer@redhat.com> | 2015-11-01 00:06:01 +0100 |
| commit | a3d939ae7b5f82688a6d3450f95286eaea338328 (patch) | |
| tree | 175d7f596c4c1a478a39cbee4a4a375fee459bf0 /drivers/md/dm-cache-policy-cleaner.c | |
| parent | dm: drop NULL test before kmem_cache_destroy() and mempool_destroy() (diff) | |
| download | linux-a3d939ae7b5f82688a6d3450f95286eaea338328.tar.xz 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-cleaner.c')
| -rw-r--r-- | drivers/md/dm-cache-policy-cleaner.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-cache-policy-cleaner.c b/drivers/md/dm-cache-policy-cleaner.c index 240c9f0e85e7..c1612d43e601 100644 --- a/drivers/md/dm-cache-policy-cleaner.c +++ b/drivers/md/dm-cache-policy-cleaner.c @@ -83,7 +83,7 @@ static struct list_head *list_pop(struct list_head *q) static int alloc_hash(struct hash *hash, unsigned elts) { hash->nr_buckets = next_power(elts >> 4, 16); - hash->hash_bits = ffs(hash->nr_buckets) - 1; + hash->hash_bits = __ffs(hash->nr_buckets); hash->table = vzalloc(sizeof(*hash->table) * hash->nr_buckets); return hash->table ? 0 : -ENOMEM; |