__ptep_modify_prot_start 412 arch/x86/kernel/paravirt.c .ptep_modify_prot_start = __ptep_modify_prot_start, __ptep_modify_prot_start 1310 arch/x86/xen/enlighten.c .ptep_modify_prot_start = __ptep_modify_prot_start, __ptep_modify_prot_start 241 include/asm-generic/pgtable.h return __ptep_modify_prot_start(mm, addr, ptep);