Hi Alexandre, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on tip/x86/mm] [also build test WARNING on v5.10-rc3] [cannot apply to tip/x86/core tip/x86/asm next-20201113] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use '--base' as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Alexandre-Chartre/x86-pti-Defer-... base: https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git 1fcd009102ee02e217f2e7635ab65517d785da8e config: x86_64-allyesconfig (attached as .config) compiler: gcc-9 (Debian 9.3.0-15) 9.3.0 reproduce (this is a W=1 build): # https://github.com/0day-ci/linux/commit/e89fc37752f2832fa239ef9e40c6c089e... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Alexandre-Chartre/x86-pti-Defer-CR3-switch-to-C-code/20201109-225007 git checkout e89fc37752f2832fa239ef9e40c6c089e204561a # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All warnings (new ones prefixed by >>): 543 | __visible noinstr void exc_nmi_user(struct pt_regs *regs) | ^~~~~~~~~~~~ vim +/exc_nmi_user +543 arch/x86/kernel/nmi.c 542 544 { 545 handle_nmi(regs); 546 mds_user_clear_cpu_buffers(); 547 } 548 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org