linux-kernel - arch/powerpc/platforms/52xx/lite5200_pm.c:215:9: error: implicit declaration of function 'enable_kernel

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Date:   Sat, 1 Jan 2022 05:53:04 +0800
From:   kernel test robot <lkp@...el.com>
To:     Christophe Leroy <christophe.leroy@...roup.eu>
Cc:     kbuild-all@...ts.01.org, linux-kernel@...r.kernel.org,
        Michael Ellerman <mpe@...erman.id.au>
Subject: arch/powerpc/platforms/52xx/lite5200_pm.c:215:9: error: implicit
 declaration of function 'enable_kernel_fp'

Hi Christophe,

FYI, the error/warning still remains.

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   1b4e3f26f9f7553b260b8aed43967500961448a6
commit: 7d68c89169508064c460a1208f38ed0589d226fa powerpc/32s: Allow deselecting CONFIG_PPC_FPU on mpc832x
date:   1 year, 1 month ago
config: powerpc-randconfig-r034-20220101 (https://download.01.org/0day-ci/archive/20220101/202201010554.xCKQH2XW-lkp@intel.com/config)
compiler: powerpc-linux-gcc (GCC) 11.2.0
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
        # 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 config file to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross O=build_dir ARCH=powerpc SHELL=/bin/bash arch/powerpc/platforms/52xx/ arch/powerpc/platforms/83xx/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All errors (new ones prefixed by >>):

   arch/powerpc/platforms/52xx/lite5200_pm.c: In function 'lite5200_pm_enter':
>> arch/powerpc/platforms/52xx/lite5200_pm.c:215:9: error: implicit declaration of function 'enable_kernel_fp' [-Werror=implicit-function-declaration]
     215 |         enable_kernel_fp();
         |         ^~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors
--
   arch/powerpc/platforms/83xx/suspend.c: In function 'mpc83xx_suspend_enter':
>> arch/powerpc/platforms/83xx/suspend.c:210:17: error: implicit declaration of function 'enable_kernel_fp' [-Werror=implicit-function-declaration]
     210 |                 enable_kernel_fp();
         |                 ^~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/enable_kernel_fp +215 arch/powerpc/platforms/52xx/lite5200_pm.c

ee983079ce0464 Domen Puncer 2007-07-18  204  
ee983079ce0464 Domen Puncer 2007-07-18  205  static int lite5200_pm_enter(suspend_state_t state)
ee983079ce0464 Domen Puncer 2007-07-18  206  {
ee983079ce0464 Domen Puncer 2007-07-18  207  	/* deep sleep? let mpc52xx code handle that */
ee983079ce0464 Domen Puncer 2007-07-18  208  	if (state == PM_SUSPEND_STANDBY) {
ee983079ce0464 Domen Puncer 2007-07-18  209  		return mpc52xx_pm_enter(state);
ee983079ce0464 Domen Puncer 2007-07-18  210  	}
ee983079ce0464 Domen Puncer 2007-07-18  211  
ee983079ce0464 Domen Puncer 2007-07-18  212  	lite5200_save_regs();
ee983079ce0464 Domen Puncer 2007-07-18  213  
ee983079ce0464 Domen Puncer 2007-07-18  214  	/* effectively save FP regs */
ee983079ce0464 Domen Puncer 2007-07-18 @215  	enable_kernel_fp();
ee983079ce0464 Domen Puncer 2007-07-18  216  
ee983079ce0464 Domen Puncer 2007-07-18  217  	lite5200_low_power(sram, mbar);
ee983079ce0464 Domen Puncer 2007-07-18  218  
ee983079ce0464 Domen Puncer 2007-07-18  219  	lite5200_restore_regs();
ee983079ce0464 Domen Puncer 2007-07-18  220  
ee983079ce0464 Domen Puncer 2007-07-18  221  	iounmap(mbar);
ee983079ce0464 Domen Puncer 2007-07-18  222  	return 0;
ee983079ce0464 Domen Puncer 2007-07-18  223  }
ee983079ce0464 Domen Puncer 2007-07-18  224  

:::::: The code at line 215 was first introduced by commit
:::::: ee983079ce04641523b23b8ed02cc3503632351e [POWERPC] MPC5200 low power mode

:::::: TO: Domen Puncer <domen.puncer@...argo.com>
:::::: CC: Paul Mackerras <paulus@...ba.org>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org