Hi Christophe, FYI, the error/warning still remains.
tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 19c329f6808995b142b3966301f217c831e7cf31 commit: 7d68c89169508064c460a1208f38ed0589d226fa powerpc/32s: Allow deselecting CONFIG_PPC_FPU on mpc832x date: 7 weeks ago config: powerpc-randconfig-r036-20210118 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 95d146182fdf2315e74943b93fb3bb0cbafc5d89) 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/?id=7d68c89169508064c460a1208f38ed0589d226fa 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 <l...@intel.com> All errors (new ones prefixed by >>): >> arch/powerpc/platforms/83xx/suspend.c:210:3: error: implicit declaration of >> function 'enable_kernel_fp' [-Werror,-Wimplicit-function-declaration] enable_kernel_fp(); ^ 1 error generated. vim +/enable_kernel_fp +210 arch/powerpc/platforms/83xx/suspend.c 87faaabb09d0802d Anton Vorontsov 2009-12-10 173 d49747bdfb2ddebe Scott Wood 2007-10-09 174 static int mpc83xx_suspend_enter(suspend_state_t state) d49747bdfb2ddebe Scott Wood 2007-10-09 175 { d49747bdfb2ddebe Scott Wood 2007-10-09 176 int ret = -EAGAIN; d49747bdfb2ddebe Scott Wood 2007-10-09 177 d49747bdfb2ddebe Scott Wood 2007-10-09 178 /* Don't go to sleep if there's a race where pci_pm_state changes d49747bdfb2ddebe Scott Wood 2007-10-09 179 * between the agent thread checking it and the PM code disabling d49747bdfb2ddebe Scott Wood 2007-10-09 180 * interrupts. d49747bdfb2ddebe Scott Wood 2007-10-09 181 */ d49747bdfb2ddebe Scott Wood 2007-10-09 182 if (wake_from_pci) { d49747bdfb2ddebe Scott Wood 2007-10-09 183 if (pci_pm_state != (deep_sleeping ? 3 : 2)) d49747bdfb2ddebe Scott Wood 2007-10-09 184 goto out; d49747bdfb2ddebe Scott Wood 2007-10-09 185 d49747bdfb2ddebe Scott Wood 2007-10-09 186 out_be32(&pmc_regs->config1, d49747bdfb2ddebe Scott Wood 2007-10-09 187 in_be32(&pmc_regs->config1) | PMCCR1_PME_EN); d49747bdfb2ddebe Scott Wood 2007-10-09 188 } d49747bdfb2ddebe Scott Wood 2007-10-09 189 d49747bdfb2ddebe Scott Wood 2007-10-09 190 /* Put the system into low-power mode and the RAM d49747bdfb2ddebe Scott Wood 2007-10-09 191 * into self-refresh mode once the core goes to d49747bdfb2ddebe Scott Wood 2007-10-09 192 * sleep. d49747bdfb2ddebe Scott Wood 2007-10-09 193 */ d49747bdfb2ddebe Scott Wood 2007-10-09 194 d49747bdfb2ddebe Scott Wood 2007-10-09 195 out_be32(&pmc_regs->config, PMCCR_SLPEN | PMCCR_DLPEN); d49747bdfb2ddebe Scott Wood 2007-10-09 196 d49747bdfb2ddebe Scott Wood 2007-10-09 197 /* If it has deep sleep (i.e. it's an 831x or compatible), d49747bdfb2ddebe Scott Wood 2007-10-09 198 * disable power to the core upon entering sleep mode. This will d49747bdfb2ddebe Scott Wood 2007-10-09 199 * require going through the boot firmware upon a wakeup event. d49747bdfb2ddebe Scott Wood 2007-10-09 200 */ d49747bdfb2ddebe Scott Wood 2007-10-09 201 d49747bdfb2ddebe Scott Wood 2007-10-09 202 if (deep_sleeping) { 87faaabb09d0802d Anton Vorontsov 2009-12-10 203 mpc83xx_suspend_save_regs(); 87faaabb09d0802d Anton Vorontsov 2009-12-10 204 d49747bdfb2ddebe Scott Wood 2007-10-09 205 out_be32(&pmc_regs->mask, PMCER_ALL); d49747bdfb2ddebe Scott Wood 2007-10-09 206 d49747bdfb2ddebe Scott Wood 2007-10-09 207 out_be32(&pmc_regs->config1, d49747bdfb2ddebe Scott Wood 2007-10-09 208 in_be32(&pmc_regs->config1) | PMCCR1_POWER_OFF); d49747bdfb2ddebe Scott Wood 2007-10-09 209 d49747bdfb2ddebe Scott Wood 2007-10-09 @210 enable_kernel_fp(); d49747bdfb2ddebe Scott Wood 2007-10-09 211 d49747bdfb2ddebe Scott Wood 2007-10-09 212 mpc83xx_enter_deep_sleep(immrbase); d49747bdfb2ddebe Scott Wood 2007-10-09 213 d49747bdfb2ddebe Scott Wood 2007-10-09 214 out_be32(&pmc_regs->config1, d49747bdfb2ddebe Scott Wood 2007-10-09 215 in_be32(&pmc_regs->config1) & ~PMCCR1_POWER_OFF); d49747bdfb2ddebe Scott Wood 2007-10-09 216 d49747bdfb2ddebe Scott Wood 2007-10-09 217 out_be32(&pmc_regs->mask, PMCER_PMCI); 87faaabb09d0802d Anton Vorontsov 2009-12-10 218 87faaabb09d0802d Anton Vorontsov 2009-12-10 219 mpc83xx_suspend_restore_regs(); d49747bdfb2ddebe Scott Wood 2007-10-09 220 } else { d49747bdfb2ddebe Scott Wood 2007-10-09 221 out_be32(&pmc_regs->mask, PMCER_PMCI); d49747bdfb2ddebe Scott Wood 2007-10-09 222 d49747bdfb2ddebe Scott Wood 2007-10-09 223 mpc6xx_enter_standby(); d49747bdfb2ddebe Scott Wood 2007-10-09 224 } d49747bdfb2ddebe Scott Wood 2007-10-09 225 d49747bdfb2ddebe Scott Wood 2007-10-09 226 ret = 0; d49747bdfb2ddebe Scott Wood 2007-10-09 227 d49747bdfb2ddebe Scott Wood 2007-10-09 228 out: d49747bdfb2ddebe Scott Wood 2007-10-09 229 out_be32(&pmc_regs->config1, d49747bdfb2ddebe Scott Wood 2007-10-09 230 in_be32(&pmc_regs->config1) & ~PMCCR1_PME_EN); d49747bdfb2ddebe Scott Wood 2007-10-09 231 d49747bdfb2ddebe Scott Wood 2007-10-09 232 return ret; d49747bdfb2ddebe Scott Wood 2007-10-09 233 } d49747bdfb2ddebe Scott Wood 2007-10-09 234 :::::: The code at line 210 was first introduced by commit :::::: d49747bdfb2ddebea24d1580da55b79d093d48a9 powerpc/mpc83xx: Power Management support :::::: TO: Scott Wood <scottw...@freescale.com> :::::: CC: Kumar Gala <ga...@kernel.crashing.org> --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-...@lists.01.org
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