PG_compound       393 include/linux/page-flags.h #define PG_head_mask ((1L << PG_compound))
PG_compound       394 include/linux/page-flags.h #define PG_head_tail_mask ((1L << PG_compound) | (1L << PG_reclaim))
PG_compound       419 include/linux/page-flags.h 	BUG_ON((page->flags & PG_head_tail_mask) != (1 << PG_compound));
PG_compound       420 include/linux/page-flags.h 	clear_bit(PG_compound, &page->flags);