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authorAkinobu Mita <akinobu.mita@gmail.com>2011-07-26 02:13:38 +0200
committerLinus Torvalds <torvalds@linux-foundation.org>2011-07-26 05:57:17 +0200
commit9d6bf5aa177ee7ffdcee2a590ef8a1bf9e8ade87 (patch)
tree563a7b08688ba07ebdbdfc5e1d13ab89e2ed8062 /fs
parentreiserfs: use proper little-endian bitops (diff)
downloadlinux-9d6bf5aa177ee7ffdcee2a590ef8a1bf9e8ade87.tar.xz
linux-9d6bf5aa177ee7ffdcee2a590ef8a1bf9e8ade87.zip
reiserfs: use hweight_long()
Use hweight_long() to count free bits in the bitmap. Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Diffstat (limited to 'fs')
-rw-r--r--fs/reiserfs/bitmap.c6
1 files changed, 1 insertions, 5 deletions
diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c
index 567385aa7813..d1aca1df4f92 100644
--- a/fs/reiserfs/bitmap.c
+++ b/fs/reiserfs/bitmap.c
@@ -1222,15 +1222,11 @@ void reiserfs_cache_bitmap_metadata(struct super_block *sb,
info->free_count = 0;
while (--cur >= (unsigned long *)bh->b_data) {
- int i;
-
/* 0 and ~0 are special, we can optimize for them */
if (*cur == 0)
info->free_count += BITS_PER_LONG;
else if (*cur != ~0L) /* A mix, investigate */
- for (i = BITS_PER_LONG - 1; i >= 0; i--)
- if (!reiserfs_test_le_bit(i, cur))
- info->free_count++;
+ info->free_count += BITS_PER_LONG - hweight_long(*cur);
}
}