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reiserfs: use hweight_long()

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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>
This commit is contained in:
Akinobu Mita 2011-07-25 17:13:38 -07:00 committed by Linus Torvalds
parent 0c2fd1bfb1
commit 9d6bf5aa17
1 changed files with 1 additions and 5 deletions
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6
fs/reiserfs/bitmap.c
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@ -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);
}
}