alloc_p4d 354 arch/x86/include/asm/paravirt.h PVOP_VCALL2(mmu.alloc_p4d, mm, pfn); alloc_p4d 241 arch/x86/include/asm/paravirt_types.h void (*alloc_p4d)(struct mm_struct *mm, unsigned long pfn); alloc_p4d 380 arch/x86/kernel/paravirt.c .mmu.alloc_p4d = paravirt_nop,