Hi "Daniel, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on linuxtv-media/master] [also build test WARNING on next-20200519] [cannot apply to linus/master linux/master v5.7-rc6] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system. BTW, we also suggest to use '--base' option to specify the base tree in git format-patch, please see https://stackoverflow.com/a/37406982] url: https://github.com/0day-ci/linux/commits/Daniel-W-S-Almeida/media-vidtv-i... base: git://linuxtv.org/media_tree.git master config: x86_64-defconfig (attached as .config) compiler: gcc-7 (Ubuntu 7.5.0-6ubuntu2) 7.5.0 reproduce: # save the attached .config to linux build tree make ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>, old ones prefixed by <<): void mark_rodata_ro(void) ^~~~~~~~~~~~~~ vim +/mark_rodata_ro +1264 arch/x86/mm/init_64.c 16239630974516a arch/x86/mm/init_64.c Steven Rostedt 2009-02-17 1263 67df197b1a07944 arch/x86_64/mm/init.c Arjan van de Ven 2006-01-06 @1264 void mark_rodata_ro(void) 67df197b1a07944 arch/x86_64/mm/init.c Arjan van de Ven 2006-01-06 1265 { 74e081797bd9d2a arch/x86/mm/init_64.c Suresh Siddha 2009-10-14 1266 unsigned long start = PFN_ALIGN(_text); fc8d782677f163d arch/x86/mm/init_64.c Alexander Duyck 2012-11-16 1267 unsigned long rodata_start = PFN_ALIGN(__start_rodata); 2d0004d19829c84 arch/x86/mm/init_64.c Kees Cook 2019-10-29 1268 unsigned long end = (unsigned long)__end_rodata_hpage_align; 2d0004d19829c84 arch/x86/mm/init_64.c Kees Cook 2019-10-29 1269 unsigned long text_end = PFN_ALIGN(_etext); 2d0004d19829c84 arch/x86/mm/init_64.c Kees Cook 2019-10-29 1270 unsigned long rodata_end = PFN_ALIGN(__end_rodata); 45e2a9d4701d8c6 arch/x86/mm/init_64.c Kees Cook 2014-11-14 1271 unsigned long all_end; 8f0f996e80b980f arch/x86/mm/init_64.c Steven Rostedt 2008-05-12 1272 6fb14755a676282 arch/x86_64/mm/init.c Jan Beulich 2007-05-02 1273 printk(KERN_INFO "Write protecting the kernel read-only data: %luk\n", e3ebadd95cb621e arch/x86_64/mm/init.c Linus Torvalds 2007-05-07 1274 (end - start) >> 10); 984bb80d94d8915 arch/x86/mm/init_64.c Arjan van de Ven 2008-02-06 1275 set_memory_ro(start, (end - start) >> PAGE_SHIFT); 984bb80d94d8915 arch/x86/mm/init_64.c Arjan van de Ven 2008-02-06 1276 16239630974516a arch/x86/mm/init_64.c Steven Rostedt 2009-02-17 1277 kernel_set_to_readonly = 1; 16239630974516a arch/x86/mm/init_64.c Steven Rostedt 2009-02-17 1278 984bb80d94d8915 arch/x86/mm/init_64.c Arjan van de Ven 2008-02-06 1279 /* 72212675d1c96f5 arch/x86/mm/init_64.c Yinghai Lu 2013-01-24 1280 * The rodata/data/bss/brk section (but not the kernel text!) 72212675d1c96f5 arch/x86/mm/init_64.c Yinghai Lu 2013-01-24 1281 * should also be not-executable. 45e2a9d4701d8c6 arch/x86/mm/init_64.c Kees Cook 2014-11-14 1282 * 45e2a9d4701d8c6 arch/x86/mm/init_64.c Kees Cook 2014-11-14 1283 * We align all_end to PMD_SIZE because the existing mapping 45e2a9d4701d8c6 arch/x86/mm/init_64.c Kees Cook 2014-11-14 1284 * is a full PMD. If we would align _brk_end to PAGE_SIZE we 45e2a9d4701d8c6 arch/x86/mm/init_64.c Kees Cook 2014-11-14 1285 * split the PMD and the reminder between _brk_end and the end 45e2a9d4701d8c6 arch/x86/mm/init_64.c Kees Cook 2014-11-14 1286 * of the PMD will remain mapped executable. 45e2a9d4701d8c6 arch/x86/mm/init_64.c Kees Cook 2014-11-14 1287 * 45e2a9d4701d8c6 arch/x86/mm/init_64.c Kees Cook 2014-11-14 1288 * Any PMD which was setup after the one which covers _brk_end 45e2a9d4701d8c6 arch/x86/mm/init_64.c Kees Cook 2014-11-14 1289 * has been zapped already via cleanup_highmem(). 984bb80d94d8915 arch/x86/mm/init_64.c Arjan van de Ven 2008-02-06 1290 */ 45e2a9d4701d8c6 arch/x86/mm/init_64.c Kees Cook 2014-11-14 1291 all_end = roundup((unsigned long)_brk_end, PMD_SIZE); ab76f7b4ab2397f arch/x86/mm/init_64.c Stephen Smalley 2015-10-01 1292 set_memory_nx(text_end, (all_end - text_end) >> PAGE_SHIFT); 67df197b1a07944 arch/x86_64/mm/init.c Arjan van de Ven 2006-01-06 1293 :::::: The code at line 1264 was first introduced by commit :::::: 67df197b1a07944c2e0e40ded3d4fd07d108e110 [PATCH] x86/x86_64: mark rodata section read-only: x86-64 support :::::: TO: Arjan van de Ven <arjan(a)infradead.org&gt; :::::: CC: Linus Torvalds <torvalds(a)g5.osdl.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org