ext4_count_free   813 fs/ext4/balloc.c 		x = ext4_count_free(bitmap_bh, sb->s_blocksize);
ext4_count_free  1044 fs/ext4/ext4.h extern unsigned long ext4_count_free(struct buffer_head *, unsigned);
ext4_count_free   988 fs/ext4/ialloc.c 		x = ext4_count_free(bitmap_bh, EXT4_INODES_PER_GROUP(sb) / 8);