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Date: Sun, 14 Nov 2021 12:34:54 +0100
From: Sergio Paracuellos <sergio.paracuellos@...il.com>
To: kernel test robot <lkp@...el.com>
Cc: kbuild-all@...ts.01.org,
linux-kernel <linux-kernel@...r.kernel.org>,
Bjorn Helgaas <helgaas@...nel.org>,
Lorenzo Pieralisi <lorenzo.pieralisi@....com>
Subject: Re: drivers/pci/controller/pcie-mt7621.c:224:13: error: implicit
declaration of function 'mips_cps_numiocu'
Hi,
On Sun, Nov 14, 2021 at 12:13 PM kernel test robot <lkp@...el.com> wrote:
>
> 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/?id=2bdd5238e756aac3ecbffc7c22b884485e84062e
> 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@...el.com>
>
> All errors (new ones prefixed by >>):
>
> drivers/pci/controller/pcie-mt7621.c: In function 'setup_cm_memory_region':
> >> drivers/pci/controller/pcie-mt7621.c:224:13: error: implicit declaration of function 'mips_cps_numiocu' [-Werror=implicit-function-declaration]
> 224 | if (mips_cps_numiocu(0)) {
> | ^~~~~~~~~~~~~~~~
> >> drivers/pci/controller/pcie-mt7621.c:232:17: error: implicit declaration of function 'write_gcr_reg1_base'; did you mean 'write_gc0_ebase'? [-Werror=implicit-function-declaration]
> 232 | write_gcr_reg1_base(entry->res->start);
> | ^~~~~~~~~~~~~~~~~~~
> | write_gc0_ebase
> >> drivers/pci/controller/pcie-mt7621.c:233:17: error: implicit declaration of function 'write_gcr_reg1_mask'; did you mean 'write_gc0_pagemask'? [-Werror=implicit-function-declaration]
> 233 | write_gcr_reg1_mask(mask | CM_GCR_REGn_MASK_CMTGT_IOCU0);
> | ^~~~~~~~~~~~~~~~~~~
> | write_gc0_pagemask
> >> drivers/pci/controller/pcie-mt7621.c:233:44: error: 'CM_GCR_REGn_MASK_CMTGT_IOCU0' undeclared (first use in this function)
> 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:
> >> drivers/pci/controller/pcie-mt7621.c:235:46: error: implicit declaration of function 'read_gcr_reg1_base'; did you mean 'read_gc0_ebase'? [-Werror=implicit-function-declaration]
> 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",
> | ^~~~~~~~
> >> drivers/pci/controller/pcie-mt7621.c:236:46: error: implicit declaration of function 'read_gcr_reg1_mask'; did you mean 'read_gc0_pagemask'? [-Werror=implicit-function-declaration]
> 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
These functions are MIPS specific arch headers included in
'arch/mips/include/asm'. There is no specific include for this files
in driver code since MIPS platforms include directly this directory
through cflags and driver compiles without problem. But, yes, passing
-Werror got this ugly implicit stuff as errors.
We are currently thinking of a way to move this MIPS
specific stuff into ralink platform code to allow this driver to
properly be compile tested for any architecture [0]. If the specific
MIPS code finally is not moved anywhere, I will send a patch to
explicitly include the MIPS needed headers here.
Bjorn, if you prefer me to send a patch for this first, let me know.
Best regards,
Sergio Paracuellos
[0]: https://lore.kernel.org/linux-mips/CAMhs-H8ShoaYiFOOzJaGC68nZz=V365RXN_Kjuj=fPFENGJiiw@mail.gmail.com/T/#t
>
>
> 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@...nwrt.org>
> :::::: CC: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org
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