[kbuild-all] drivers/pci/controller/pcie-mt7621.c:224:13: error: implicit declaration of function 'mips_cps_numiocu'

tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c8c109546a19613d323a319d0c921cb1f317e629 commit: 2bdd5238e756aac3ecbffc7c22b884485e84062e PCI: mt7621: Add MediaTek MT7621 PCIe host controller driver date: 3 weeks ago config: mips-randconfig-r001-20211114 (attached as .config) compiler: mips64-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... git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 2bdd5238e756aac3ecbffc7c22b884485e84062e # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=mips 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 >>): drivers/pci/controller/pcie-mt7621.c: In function 'setup_cm_memory_region': 224 | if (mips_cps_numiocu(0)) { | ^~~~~~~~~~~~~~~~ 232 | write_gcr_reg1_base(entry->res->start); | ^~~~~~~~~~~~~~~~~~~ | write_gc0_ebase 233 | write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0); | ^~~~~~~~~~~~~~~~~~~ | write_gc0_pagemask 233 | write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0); | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ drivers/pci/controller/pcie-mt7621.c:233:44: note: each undeclared identifier is reported only once for each function it appears in In file included from include/linux/device.h:15, from include/linux/of_platform.h:9, from drivers/pci/controller/pcie-mt7621.c:26: 235 | (unsigned long long)read_gcr_reg1_base(), | ^~~~~~~~~~~~~~~~~~ include/linux/dev_printk.h:110:37: note: in definition of macro 'dev_printk_index_wrap' 110 | _p_func(dev, fmt, ##__VA_ARGS__); \ | ^~~~~~~~~~~ drivers/pci/controller/pcie-mt7621.c:234:17: note: in expansion of macro 'dev_info' 234 | dev_info(dev, "PCI coherence region base: 0x%08llx, mask/settings: 0x%08llx\n", | ^~~~~~~~ 236 | (unsigned long long)read_gcr_reg1_mask()); | ^~~~~~~~~~~~~~~~~~ include/linux/dev_printk.h:110:37: note: in definition of macro 'dev_printk_index_wrap' 110 | _p_func(dev, fmt, ##__VA_ARGS__); \ | ^~~~~~~~~~~ drivers/pci/controller/pcie-mt7621.c:234:17: note: in expansion of macro 'dev_info' 234 | dev_info(dev, "PCI coherence region base: 0x%08llx, mask/settings: 0x%08llx\n", | ^~~~~~~~ cc1: some warnings being treated as errors vim +/mips_cps_numiocu +224 drivers/pci/controller/pcie-mt7621.c e51844bf825169 drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-11-24 210 b15606e63ea90c drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2021-06-14 211 static int setup_cm_memory_region(struct pci_host_bridge *host) 03f152e31f4ae8 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 212 { b15606e63ea90c drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2021-06-14 213 struct mt7621_pcie *pcie = pci_host_bridge_priv(host); d936550784a23b drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-11-04 214 struct device *dev = pcie->dev; b15606e63ea90c drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2021-06-14 215 struct resource_entry *entry; 03f152e31f4ae8 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 216 resource_size_t mask; 8571c62d45cb7e drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-08-03 217 b15606e63ea90c drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2021-06-14 218 entry = resource_list_first_type(&host->windows, IORESOURCE_MEM); b15606e63ea90c drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2021-06-14 219 if (!entry) { 2bdd5238e756aa drivers/pci/controller/pcie-mt7621.c Sergio Paracuellos 2021-09-22 220 dev_err(dev, "cannot get memory resource\n"); b15606e63ea90c drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2021-06-14 221 return -EINVAL; b15606e63ea90c drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2021-06-14 222 } b15606e63ea90c drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2021-06-14 223 03f152e31f4ae8 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 @224 if (mips_cps_numiocu(0)) { d2bac2fd6daa91 drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-11-04 225 /* d2bac2fd6daa91 drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-11-04 226 * FIXME: hardware doesn't accept mask values with 1s after d4e3a1f6cea79e drivers/staging/mt7621-pci/pci-mt7621.c NeilBrown 2018-05-04 227 * 0s (e.g. 0xffef), so it would be great to warn if that's d2bac2fd6daa91 drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-11-04 228 * about to happen d2bac2fd6daa91 drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-11-04 229 */ b15606e63ea90c drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2021-06-14 230 mask = ~(entry->res->end - entry->res->start); 03f152e31f4ae8 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 231 b15606e63ea90c drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2021-06-14 @232 write_gcr_reg1_base(entry->res->start); 03f152e31f4ae8 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 @233 write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0); d936550784a23b drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-11-04 234 dev_info(dev, "PCI coherence region base: 0x%08llx, mask/settings: 0x%08llx\n", 03f152e31f4ae8 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 @235 (unsigned long long)read_gcr_reg1_base(), 03f152e31f4ae8 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 @236 (unsigned long long)read_gcr_reg1_mask()); 03f152e31f4ae8 drivers/staging/mt7621-pci/pci-mt7621.c John Crispin 2018-03-15 237 } 09dd629eeabb8a drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2020-03-18 238 8571c62d45cb7e drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-08-03 239 return 0; 8571c62d45cb7e drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-08-03 240 } 8571c62d45cb7e drivers/staging/mt7621-pci/pci-mt7621.c Sergio Paracuellos 2018-08-03 241 :::::: The code at line 224 was first introduced by commit :::::: 03f152e31f4ae89c37ab240f45dd77c8a916dd26 staging: mt7621-pci: MIPS/ralink: add MT7621 pcie driver :::::: TO: John Crispin <blogic(a)openwrt.org&gt; :::::: CC: Greg Kroah-Hartman <gregkh(a)linuxfoundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org