tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 5695e51619745d4fe3ec2506a2f0cd982c5e27a4 commit: 7d68c89169508064c460a1208f38ed0589d226fa powerpc/32s: Allow deselecting CONFIG_PPC_FPU on mpc832x date: 3 months ago config: powerpc-randconfig-r021-20210228 (attached as .config) compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project 83bc7815c4235786111aa2abf7193292e4a602f5) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install powerpc cross compiling tool for clang build # apt-get install binutils-powerpc-linux-gnu # 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 7d68c89169508064c460a1208f38ed0589d226fa # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): enable_kernel_fp(); ^ 1 error generated. vim +/enable_kernel_fp +262 drivers/cpufreq/pmac32-cpufreq.c 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 229 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 230 /* Switch CPU speed under PMU control 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 231 */ 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 232 static int pmu_set_cpu_speed(int low_speed) 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 233 { 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 234 struct adb_request req; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 235 unsigned long save_l2cr; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 236 unsigned long save_l3cr; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 237 unsigned int pic_prio; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 238 unsigned long flags; 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 239 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 240 preempt_disable(); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 241 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 242 #ifdef DEBUG_FREQ 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 243 printk(KERN_DEBUG "HID1, before: %x\n", mfspr(SPRN_HID1)); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 244 #endif 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 245 pmu_suspend(); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 246 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 247 /* Disable all interrupt sources on openpic */ 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 248 pic_prio = mpic_cpu_get_priority(); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 249 mpic_cpu_set_priority(0xf); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 250 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 251 /* Make sure the decrementer won't interrupt us */ 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 252 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 80f7228b59e4bb arch/powerpc/platforms/powermac/cpufreq_32.c Adrian Bunk 2006-06-30 253 /* Make sure any pending DEC interrupt occurring while we did 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 254 * the above didn't re-enable the DEC */ 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 255 mb(); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 256 asm volatile("mtdec %0" : : "r" (0x7fffffff)); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 257 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 258 /* We can now disable MSR_EE */ 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 259 local_irq_save(flags); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 260 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 261 /* Giveup the FPU & vec */ 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 @262 enable_kernel_fp(); 14cf11af6cf608 arch/powerpc/platforms/powermac/pmac_cpufreq.c Paul Mackerras 2005-09-26 263 :::::: The code at line 262 was first introduced by commit :::::: 14cf11af6cf608eb8c23e989ddb17a715ddce109 powerpc: Merge enough to start building in arch/powerpc. :::::: TO: Paul Mackerras <paulus(a)samba.org&gt; :::::: CC: Paul Mackerras <paulus(a)samba.org&gt; 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