hole_low 651 arch/x86/xen/mmu_pv.c unsigned hole_low = 0, hole_high = 0; hole_low 662 arch/x86/xen/mmu_pv.c hole_low = pgd_index(GUARD_HOLE_BASE_ADDR); hole_low 670 arch/x86/xen/mmu_pv.c if (i >= hole_low && i < hole_high)