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authorMikulas Patocka <mpatocka@redhat.com>2015-10-02 11:21:24 -0400
committerMike Snitzer <snitzer@redhat.com>2015-10-31 19:06:01 -0400
commita3d939ae7b5f82688a6d3450f95286eaea338328 (patch)
tree175d7f596c4c1a478a39cbee4a4a375fee459bf0 /drivers/md/dm-exception-store.c
parent6f65985e2636c0b170eade6a72d216632f065e26 (diff)
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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-exception-store.c')
-rw-r--r--drivers/md/dm-exception-store.c2
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/md/dm-exception-store.c b/drivers/md/dm-exception-store.c
index ebaa4f803eec..3eef6d6f15cd 100644
--- a/drivers/md/dm-exception-store.c
+++ b/drivers/md/dm-exception-store.c
@@ -183,7 +183,7 @@ int dm_exception_store_set_chunk_size(struct dm_exception_store *store,
store->chunk_size = chunk_size;
store->chunk_mask = chunk_size - 1;
- store->chunk_shift = ffs(chunk_size) - 1;
+ store->chunk_shift = __ffs(chunk_size);
return 0;
}