The patch titled
reiserfs: use hweight_long()
has been added to the -mm tree. Its filename is
reiserfs-use-hweight_long.patch
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The current -mm tree may be found at http://userweb.kernel.org/~akpm/mmotm/
------------------------------------------------------
Subject: reiserfs: use hweight_long()
From: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Use hweight_long() to count free bits in the bitmap.
Signed-off-by: Akinobu Mita <akinobu.mita@xxxxxxxxx>
Signed-off-by: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
---
fs/reiserfs/bitmap.c | 6 +-----
1 file changed, 1 insertion(+), 5 deletions(-)
diff -puN fs/reiserfs/bitmap.c~reiserfs-use-hweight_long fs/reiserfs/bitmap.c
--- a/fs/reiserfs/bitmap.c~reiserfs-use-hweight_long
+++ a/fs/reiserfs/bitmap.c
@@ -1222,15 +1222,11 @@ void reiserfs_cache_bitmap_metadata(stru
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);
}
}
_
Patches currently in -mm which might be from akinobu.mita@xxxxxxxxx are
linux-next.patch
dm-use-use-proper-little-endian-bitops.patch
ext4-use-proper-little-endian-bitops.patch
ocfs2-avoid-unaligned-access-to-dqc_bitmap.patch
md-use-proper-little-endian-bitops.patch
reiserfs-use-proper-little-endian-bitops.patch
reiserfs-use-hweight_long.patch
asm-generic-add-another-generic-ext2-atomic-bitops.patch
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