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authorAkinobu Mita <akinobu.mita@gmail.com>2012-07-30 14:41:03 -0700
committerLinus Torvalds <torvalds@linux-foundation.org>2012-07-30 17:25:16 -0700
commita75613ec73ec87726a81fe421385a13c25fdcfc4 (patch)
treece929ce5fd0024483fa6ea3464e95e88a042d86c
parent9a601396e8681d9884a9f429cba7ceb2b2a4d21c (diff)
downloadblackbird-op-linux-a75613ec73ec87726a81fe421385a13c25fdcfc4.tar.gz
blackbird-op-linux-a75613ec73ec87726a81fe421385a13c25fdcfc4.zip
ocfs2: use memweight()
Use memweight to count the total number of bits set in memory area. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Cc: Mark Fasheh <mfasheh@suse.com> Cc: Joel Becker <jlbec@evilplan.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
-rw-r--r--fs/ocfs2/localalloc.c8
1 files changed, 2 insertions, 6 deletions
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index 210c35237548..a9f78c74d687 100644
--- a/fs/ocfs2/localalloc.c
+++ b/fs/ocfs2/localalloc.c
@@ -784,14 +784,10 @@ bail:
static u32 ocfs2_local_alloc_count_bits(struct ocfs2_dinode *alloc)
{
- int i;
- u8 *buffer;
- u32 count = 0;
+ u32 count;
struct ocfs2_local_alloc *la = OCFS2_LOCAL_ALLOC(alloc);
- buffer = la->la_bitmap;
- for (i = 0; i < le16_to_cpu(la->la_size); i++)
- count += hweight8(buffer[i]);
+ count = memweight(la->la_bitmap, le16_to_cpu(la->la_size));
trace_ocfs2_local_alloc_count_bits(count);
return count;
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