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>
diff --git a/fs/reiserfs/bitmap.c b/fs/reiserfs/bitmap.c
index 567385a..d1aca1df 100644
--- a/fs/reiserfs/bitmap.c
+++ b/fs/reiserfs/bitmap.c
@@ -1222,15 +1222,11 @@
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);
}
}
