PG_lru
1 << PG_lru |
u |= kpf_copy_bit(k, KPF_LRU, PG_lru);
(1UL << PG_lru | 1UL << PG_locked | \
VMCOREINFO_NUMBER(PG_lru);
flags |= 1UL << PG_uptodate | 1UL << PG_dirty | 1UL << PG_lru
#define lru (1UL << PG_lru)