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List: ocfs2-devel
Subject: [Ocfs2-devel] [PATCH 07/10] ocfs2: use memweight()
From: Akinobu Mita <akinobu.mita () gmail ! com>
Date: 2012-05-20 13:23:20
Message-ID: 1337520203-29147-7-git-send-email-akinobu.mita () gmail ! com
[Download RAW message or body]
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>
Cc: ocfs2-devel@oss.oracle.com
---
fs/ocfs2/localalloc.c | 8 ++------
1 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/fs/ocfs2/localalloc.c b/fs/ocfs2/localalloc.c
index 210c352..a9f78c7 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;
--
1.7.7.6
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