PT_INITIAL
DEFINE(ASM_PT_INITIAL, PT_INITIAL);
pte_t pg0[PT_INITIAL * PTRS_PER_PTE] __section(".data..vm0.pte") __attribute__ ((aligned(PAGE_SIZE)));
BUILD_BUG_ON(PT_INITIAL > PTRS_PER_PMD);
BUILD_BUG_ON(PT_INITIAL > PTRS_PER_PGD);