chk_prot 750 arch/x86/mm/pageattr.c pgprot_t old_prot, new_prot, req_prot, chk_prot; chk_prot 830 arch/x86/mm/pageattr.c chk_prot = static_protections(old_prot, lpaddr, old_pfn, numpages, chk_prot 833 arch/x86/mm/pageattr.c if (WARN_ON_ONCE(pgprot_val(chk_prot) != pgprot_val(old_prot))) {