FIX_WP_TEST 753 arch/x86/mm/init_32.c __set_fixmap(FIX_WP_TEST, __pa_symbol(empty_zero_page), PAGE_KERNEL_RO); FIX_WP_TEST 755 arch/x86/mm/init_32.c if (probe_kernel_write((char *)fix_to_virt(FIX_WP_TEST), &z, 1)) { FIX_WP_TEST 756 arch/x86/mm/init_32.c clear_fixmap(FIX_WP_TEST); FIX_WP_TEST 2304 arch/x86/xen/mmu_pv.c case FIX_WP_TEST: