xen_ptep_modify_prot_start 1641 arch/x86/xen/enlighten.c pv_mmu_ops.ptep_modify_prot_start = xen_ptep_modify_prot_start; xen_ptep_modify_prot_start 53 arch/x86/xen/mmu.h pte_t xen_ptep_modify_prot_start(struct mm_struct *mm, unsigned long addr, pte_t *ptep);