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| 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-region-hash.c | |
| parent | 6f65985e2636c0b170eade6a72d216632f065e26 (diff) | |
| download | lwn-a3d939ae7b5f82688a6d3450f95286eaea338328.tar.gz lwn-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-region-hash.c')
| -rw-r--r-- | drivers/md/dm-region-hash.c | 2 |
1 files changed, 1 insertions, 1 deletions
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; |