Hi Aaron, Thank you for the patch! Yet something to improve: [auto build test ERROR on linus/master] [also build test ERROR on v5.19 next-20220802] [cannot apply to tip/timers/nohz] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Aaron-Tomlin/tick-sched-Ensure-quiet_vmstat-is-called-when-the-idle-tick-was-stopped-too/20220802-074341 base: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 9de1f9c8ca5100a02a2e271bdbde36202e251b4b config: x86_64-randconfig-a016-20220801 (https://download.01.org/0day-ci/archive/20220803/202208031315.Wwa9w3jr-lkp@xxxxxxxxx/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://github.com/intel-lab-lkp/linux/commit/a0d3b9fe31484c4c44c430d10d0b60e2e0551525 git remote add linux-review https://github.com/intel-lab-lkp/linux git fetch --no-tags linux-review Aaron-Tomlin/tick-sched-Ensure-quiet_vmstat-is-called-when-the-idle-tick-was-stopped-too/20220802-074341 git checkout a0d3b9fe31484c4c44c430d10d0b60e2e0551525 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot <lkp@xxxxxxxxx> All errors (new ones prefixed by >>): ld: vmlinux.o: in function `exit_to_user_mode_loop': >> kernel/entry/common.c:182: undefined reference to `tick_nohz_user_enter_prepare' ld: vmlinux.o: in function `exit_to_user_mode_prepare': kernel/entry/common.c:198: undefined reference to `tick_nohz_user_enter_prepare' vim +182 kernel/entry/common.c a9f3a74a29af095 Thomas Gleixner 2020-07-22 144 a9f3a74a29af095 Thomas Gleixner 2020-07-22 145 static unsigned long exit_to_user_mode_loop(struct pt_regs *regs, a9f3a74a29af095 Thomas Gleixner 2020-07-22 146 unsigned long ti_work) a9f3a74a29af095 Thomas Gleixner 2020-07-22 147 { a9f3a74a29af095 Thomas Gleixner 2020-07-22 148 /* a9f3a74a29af095 Thomas Gleixner 2020-07-22 149 * Before returning to user space ensure that all pending work a9f3a74a29af095 Thomas Gleixner 2020-07-22 150 * items have been completed. a9f3a74a29af095 Thomas Gleixner 2020-07-22 151 */ a9f3a74a29af095 Thomas Gleixner 2020-07-22 152 while (ti_work & EXIT_TO_USER_MODE_WORK) { a9f3a74a29af095 Thomas Gleixner 2020-07-22 153 a9f3a74a29af095 Thomas Gleixner 2020-07-22 154 local_irq_enable_exit_to_user(ti_work); a9f3a74a29af095 Thomas Gleixner 2020-07-22 155 a9f3a74a29af095 Thomas Gleixner 2020-07-22 156 if (ti_work & _TIF_NEED_RESCHED) a9f3a74a29af095 Thomas Gleixner 2020-07-22 157 schedule(); a9f3a74a29af095 Thomas Gleixner 2020-07-22 158 a9f3a74a29af095 Thomas Gleixner 2020-07-22 159 if (ti_work & _TIF_UPROBE) a9f3a74a29af095 Thomas Gleixner 2020-07-22 160 uprobe_notify_resume(regs); a9f3a74a29af095 Thomas Gleixner 2020-07-22 161 a9f3a74a29af095 Thomas Gleixner 2020-07-22 162 if (ti_work & _TIF_PATCH_PENDING) a9f3a74a29af095 Thomas Gleixner 2020-07-22 163 klp_update_patch_state(current); a9f3a74a29af095 Thomas Gleixner 2020-07-22 164 12db8b690010ccf Jens Axboe 2020-10-26 165 if (ti_work & (_TIF_SIGPENDING | _TIF_NOTIFY_SIGNAL)) 8ba62d37949e248 Eric W. Biederman 2022-02-09 166 arch_do_signal_or_restart(regs); a9f3a74a29af095 Thomas Gleixner 2020-07-22 167 a68de80f61f6af3 Sean Christopherson 2021-09-01 168 if (ti_work & _TIF_NOTIFY_RESUME) 03248addadf1a5e Eric W. Biederman 2022-02-09 169 resume_user_mode_work(regs); a9f3a74a29af095 Thomas Gleixner 2020-07-22 170 a9f3a74a29af095 Thomas Gleixner 2020-07-22 171 /* Architecture specific TIF work */ a9f3a74a29af095 Thomas Gleixner 2020-07-22 172 arch_exit_to_user_mode_work(regs, ti_work); a9f3a74a29af095 Thomas Gleixner 2020-07-22 173 a9f3a74a29af095 Thomas Gleixner 2020-07-22 174 /* a9f3a74a29af095 Thomas Gleixner 2020-07-22 175 * Disable interrupts and reevaluate the work flags as they a9f3a74a29af095 Thomas Gleixner 2020-07-22 176 * might have changed while interrupts and preemption was a9f3a74a29af095 Thomas Gleixner 2020-07-22 177 * enabled above. a9f3a74a29af095 Thomas Gleixner 2020-07-22 178 */ a9f3a74a29af095 Thomas Gleixner 2020-07-22 179 local_irq_disable_exit_to_user(); 47b8ff194c1fd73 Frederic Weisbecker 2021-02-01 180 47b8ff194c1fd73 Frederic Weisbecker 2021-02-01 181 /* Check if any of the above work has queued a deferred wakeup */ f268c3737ecaefc Frederic Weisbecker 2021-05-27 @182 tick_nohz_user_enter_prepare(); 47b8ff194c1fd73 Frederic Weisbecker 2021-02-01 183 6ce895128b3bff7 Mark Rutland 2021-11-29 184 ti_work = read_thread_flags(); a9f3a74a29af095 Thomas Gleixner 2020-07-22 185 } a9f3a74a29af095 Thomas Gleixner 2020-07-22 186 a9f3a74a29af095 Thomas Gleixner 2020-07-22 187 /* Return the latest work state for arch_exit_to_user_mode() */ a9f3a74a29af095 Thomas Gleixner 2020-07-22 188 return ti_work; a9f3a74a29af095 Thomas Gleixner 2020-07-22 189 } a9f3a74a29af095 Thomas Gleixner 2020-07-22 190 -- 0-DAY CI Kernel Test Service https://01.org/lkp
