[nomadik:ixp4xx-cleanup-v5.13-rc1 18/24] drivers/watchdog/ixp4xx_wdt.c:175:8: error: implicit declaration of function 'read_cpuid_id'

Hi Arnd,

First bad commit (maybe != root cause):

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git ixp4xx-cleanup-v5.13-rc1
head:   c207fa412ab2848ee0539511ad8eed7aafe626a4
commit: c063af2315e30ac4defc8b59983f972c326649f4 [18/24] watchdog: ixp4xx: move mmio access to timer driver
config: m68k-allmodconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 9.3.0
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/linusw/linux-nomadik.git/commit/?id=c063af2315e30ac4defc8b59983f972c326649f4
        git remote add nomadik https://git.kernel.org/pub/scm/linux/kernel/git/linusw/linux-nomadik.git
        git fetch --no-tags nomadik ixp4xx-cleanup-v5.13-rc1
        git checkout c063af2315e30ac4defc8b59983f972c326649f4
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=m68k 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <redacted>

All errors (new ones prefixed by >>):

   drivers/watchdog/ixp4xx_wdt.c: In function 'ixp4xx_wdt_init':

quoted

drivers/watchdog/ixp4xx_wdt.c:175:8: error: implicit declaration of function 'read_cpuid_id' [-Werror=implicit-function-declaration]

     175 |  if (!(read_cpuid_id() & 0xf) && !cpu_is_ixp46x()) {
         |        ^~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/read_cpuid_id +175 drivers/watchdog/ixp4xx_wdt.c

^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  164  
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  165  static int __init ixp4xx_wdt_init(void)
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  166  {
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  167  	int ret;
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  168  
c063af2315e30a drivers/watchdog/ixp4xx_wdt.c      Arnd Bergmann  2019-08-26  169  	ret = ixp4xx_boot_status();
c063af2315e30a drivers/watchdog/ixp4xx_wdt.c      Arnd Bergmann  2019-08-26  170  	if (ret < 0)
c063af2315e30a drivers/watchdog/ixp4xx_wdt.c      Arnd Bergmann  2019-08-26  171  		return ret;
c063af2315e30a drivers/watchdog/ixp4xx_wdt.c      Arnd Bergmann  2019-08-26  172  
c063af2315e30a drivers/watchdog/ixp4xx_wdt.c      Arnd Bergmann  2019-08-26  173  	boot_status = ret ?  WDIOF_CARDRESET : 0;
c063af2315e30a drivers/watchdog/ixp4xx_wdt.c      Arnd Bergmann  2019-08-26  174  
0ba8b9b273c45d drivers/watchdog/ixp4xx_wdt.c      Russell King   2008-08-10 @175  	if (!(read_cpuid_id() & 0xf) && !cpu_is_ixp46x()) {
27c766aaacb265 drivers/watchdog/ixp4xx_wdt.c      Joe Perches    2012-02-15  176  		pr_err("Rev. A0 IXP42x CPU detected - watchdog disabled\n");
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  177  
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  178  		return -ENODEV;
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  179  	}
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  180  	ret = misc_register(&ixp4xx_wdt_miscdev);
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  181  	if (ret == 0)
27c766aaacb265 drivers/watchdog/ixp4xx_wdt.c      Joe Perches    2012-02-15  182  		pr_info("timer heartbeat %d sec\n", heartbeat);
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  183  	return ret;
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  184  }
^1da177e4c3f41 drivers/char/watchdog/ixp4xx_wdt.c Linus Torvalds 2005-04-16  185  

:::::: The code at line 175 was first introduced by commit
:::::: 0ba8b9b273c45dd23f60ff700e265a0069b33758 [ARM] cputype: separate definitions, use them

:::::: TO: Russell King [off-list ref]
:::::: CC: Russell King [off-list ref]

---
0-DAY CI Kernel Test Service, Intel Corporation
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