KPF_COMPOUND_TAIL
u |= 1 << KPF_COMPOUND_TAIL;
[KPF_COMPOUND_TAIL] = "T:compound_tail",
if (!(page_flags & (KPF_COMPOUND_HEAD | KPF_COMPOUND_TAIL))) {
!(page_flags & (KPF_COMPOUND_HEAD | KPF_COMPOUND_TAIL))) {
const uint64_t folio_tail_flags = KPF_THP | KPF_COMPOUND_TAIL;