trampoline_pud
(uintptr_t)trampoline_pud, P4D_SIZE, PAGE_TABLE);
create_pud_mapping(trampoline_pud, kernel_map.virt_addr,
static pud_t trampoline_pud[PTRS_PER_PUD] __page_aligned_bss;
#define trampoline_pud ((pud_t *)XIP_FIXUP(trampoline_pud))
(uintptr_t)trampoline_pud : (uintptr_t)trampoline_pmd))