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-snap-persistent.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-snap-persistent.c')
| -rw-r--r-- | drivers/md/dm-snap-persistent.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-snap-persistent.c b/drivers/md/dm-snap-persistent.c index bf71583296f7..046f6b81e6e6 100644 --- a/drivers/md/dm-snap-persistent.c +++ b/drivers/md/dm-snap-persistent.c @@ -321,7 +321,7 @@ static int read_header(struct pstore *ps, int *new_snapshot) bdev_logical_block_size(dm_snap_cow(ps->store->snap)-> bdev) >> 9); ps->store->chunk_mask = ps->store->chunk_size - 1; - ps->store->chunk_shift = ffs(ps->store->chunk_size) - 1; + ps->store->chunk_shift = __ffs(ps->store->chunk_size); chunk_size_supplied = 0; } |