__identity_va
kasan_populate((unsigned long)__identity_va(start),
(unsigned long)__identity_va(end),
kasan_populate((unsigned long)__identity_va(memgap_start),
(unsigned long)__identity_va(start),
kasan_populate(0, (unsigned long)__identity_va(0), POPULATE_KASAN_ZERO_SHADOW);
kasan_populate((unsigned long)__identity_va(ident_map_size), VMALLOC_START,
pgtable_populate((unsigned long)__identity_va(start),
(unsigned long)__identity_va(end),
memcpy_real_ptep = __identity_va(__virt_to_kpte(__memcpy_real_area));