Commit 9d6bf5aa authored by Akinobu Mita's avatar Akinobu Mita Committed by Linus Torvalds
Browse files

reiserfs: use hweight_long() 



Use hweight_long() to count free bits in the bitmap.

Signed-off-by: default avatarAkinobu Mita <akinobu.mita@gmail.com>
Signed-off-by: default avatarAndrew Morton <akpm@linux-foundation.org>
Signed-off-by: default avatarLinus Torvalds <torvalds@linux-foundation.org>
parent 0c2fd1bf

fs/reiserfs/bitmap.c

+1 −5
Original line number Original line Diff line number Diff line
@@ -1222,15 +1222,11 @@ void reiserfs_cache_bitmap_metadata(struct super_block *sb, 
	info->free_count = 0;

	info->free_count = 0;





	while (--cur >= (unsigned long *)bh->b_data) {

	while (--cur >= (unsigned long *)bh->b_data) {

		int i;



		/* 0 and ~0 are special, we can optimize for them */

		/* 0 and ~0 are special, we can optimize for them */

		if (*cur == 0)

		if (*cur == 0)

			info->free_count += BITS_PER_LONG;

			info->free_count += BITS_PER_LONG;

		else if (*cur != ~0L)	/* A mix, investigate */

		else if (*cur != ~0L)	/* A mix, investigate */

			for (i = BITS_PER_LONG - 1; i >= 0; i--)

			info->free_count += BITS_PER_LONG - hweight_long(*cur);

				if (!reiserfs_test_le_bit(i, cur))

					info->free_count++;

	}

	}

}

}