path: root/drivers/md/bitmap.c
diff options
authorPaul Clements <paul.clements@steeleye.com>2006-10-03 01:16:01 -0700
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-03 08:04:18 -0700
commita638b2dc951c4cafea31b34a1db1c3d94809649e (patch)
tree73c1c2135a117290308b5807b6ede21389e3264c /drivers/md/bitmap.c
parent14f50b49fdab8f4c9fc87b55d3631e3bf1ffd385 (diff)
[PATCH] md: use ffz instead of find_first_set to convert multiplier to shift
find_first_set doesn't find the least-significant bit on bigendian machines, so it is really wrong to use it. ffs is closer, but takes an 'int' and we have a 'unsigned long'. So use ffz(~X) to convert a chunksize into a chunkshift. Signed-off-by: Neil Brown <neilb@suse.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'drivers/md/bitmap.c')
1 files changed, 1 insertions, 2 deletions
diff --git a/drivers/md/bitmap.c b/drivers/md/bitmap.c
index 0a44298fb353..8e67634e79a0 100644
--- a/drivers/md/bitmap.c
+++ b/drivers/md/bitmap.c
@@ -1444,8 +1444,7 @@ int bitmap_create(mddev_t *mddev)
if (err)
goto error;
- bitmap->chunkshift = find_first_bit(&bitmap->chunksize,
- sizeof(bitmap->chunksize));
+ bitmap->chunkshift = ffz(~bitmap->chunksize);
/* now that chunksize and chunkshift are set, we can use these macros */
chunks = (blocks + CHUNK_BLOCK_RATIO(bitmap) - 1) /