tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 614cb2751d3150850d459bee596c397f344a7936 commit: b1c6a0a10bfaf36ec82fde6f621da72407fa60a1 powerpc/tau: Convert from timer to workqueue date: 11 months ago config: powerpc-randconfig-s032-20210818 (attached as .config) compiler: powerpc-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.3-348-gf0e6938b-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout b1c6a0a10bfaf36ec82fde6f621da72407fa60a1 # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/kernel/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) vim +/tau_work +199 arch/powerpc/kernel/tau_6xx.c 189 190 static int __init TAU_init(void) 191 { 192 /* We assume in SMP that if one CPU has TAU support, they 193 * all have it --BenH 194 */ 195 if (!cpu_has_feature(CPU_FTR_TAU)) { 196 printk("Thermal assist unit not available\n"); 197 tau_initialized = 0; 198 return 1; 200 201 tau_int_enable = IS_ENABLED(CONFIG_TAU_INT) && 202 !strcmp(cur_cpu_spec->platform, "ppc750"); 203 204 tau_workq = alloc_workqueue("tau", WQ_UNBOUND, 1); 205 if (!tau_workq) 206 return -ENOMEM; 207 208 on_each_cpu(TAU_init_smp, NULL, 0); 209 210 queue_work(tau_workq, &tau_work); 211 212 pr_info("Thermal assist unit using %s, shrink_timer: %d ms\n", 213 tau_int_enable ? "interrupts" : "workqueue", shrink_timer); 214 tau_initialized = 1; 215 216 return 0; 217 } 218 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org