BITMAP_FIRST_BYTE_MASK 5900 fs/btrfs/extent_io.c 	u8 mask_to_set = BITMAP_FIRST_BYTE_MASK(pos);
BITMAP_FIRST_BYTE_MASK 5942 fs/btrfs/extent_io.c 	u8 mask_to_clear = BITMAP_FIRST_BYTE_MASK(pos);
BITMAP_FIRST_BYTE_MASK  166 fs/btrfs/free-space-tree.c 	u8 mask_to_set = BITMAP_FIRST_BYTE_MASK(start);