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Date:   Tue, 21 Nov 2023 14:48:09 +0800
From:   kernel test robot <lkp@intel.com>
To:     Philipp Stanner <pstanner@redhat.com>,
        Bjorn Helgaas <helgaas@kernel.org>,
        Arnd Bergmann <arnd@kernel.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Randy Dunlap <rdunlap@infradead.org>,
        Jason Gunthorpe <jgg@ziepe.ca>,
        Eric Auger <eric.auger@redhat.com>,
        Kent Overstreet <kmo@daterainc.com>,
        Niklas Schnelle <schnelle@linux.ibm.com>,
        NeilBrown <neilb@suse.de>, John Sanpe <sanpeqf@gmail.com>,
        Dave Jiang <dave.jiang@intel.com>,
        Yury Norov <yury.norov@gmail.com>,
        Kees Cook <keescook@chromium.org>,
        "Masami Hiramatsu (Google)" <mhiramat@kernel.org>,
        David Gow <davidgow@google.com>,
        Herbert Xu <herbert@gondor.apana.org.au>,
        Thomas Gleixner <tglx@linutronix.de>,
        "wuqiang.matt" <wuqiang.matt@bytedance.com>,
        Jason Baron <jbaron@akamai.com>,
        Ben Dooks <ben.dooks@codethink.co.uk>,
        Danilo Krummrich <dakr@redhat.com>
Cc:     llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
        Linux Memory Management List <linux-mm@kvack.org>,
        linux-kernel@vger.kernel.org, linux-pci@vger.kernel.org
Subject: Re: [PATCH 1/4] lib: move pci_iomap.c to drivers/pci/
Message-ID: <202311211441.4LgOiu32-lkp@intel.com>
References: <20231120215945.52027-3-pstanner@redhat.com>
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In-Reply-To: <20231120215945.52027-3-pstanner@redhat.com>
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Hi Philipp,

kernel test robot noticed the following build errors:

[auto build test ERROR on pci/next]
[also build test ERROR on pci/for-linus linus/master v6.7-rc2 next-20231120]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Philipp-Stanner/lib-move-pci_iomap-c-to-drivers-pci/20231121-060258
base:   https://git.kernel.org/pub/scm/linux/kernel/git/pci/pci.git next
patch link:    https://lore.kernel.org/r/20231120215945.52027-3-pstanner%40redhat.com
patch subject: [PATCH 1/4] lib: move pci_iomap.c to drivers/pci/
config: arm-spear3xx_defconfig (https://download.01.org/0day-ci/archive/20231121/202311211441.4LgOiu32-lkp@intel.com/config)
compiler: clang version 16.0.4 (https://github.com/llvm/llvm-project.git ae42196bc493ffe877a7e3dff8be32035dea4d07)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231121/202311211441.4LgOiu32-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202311211441.4LgOiu32-lkp@intel.com/

All errors (new ones prefixed by >>):

   drivers/pci/iomap.c:27:15: error: redefinition of 'pci_iomap_range'
   void __iomem *pci_iomap_range(struct pci_dev *dev,
                 ^
   include/asm-generic/pci_iomap.h:44:29: note: previous definition is here
   static inline void __iomem *pci_iomap_range(struct pci_dev *dev, int bar,
                               ^
>> drivers/pci/iomap.c:43:10: error: call to undeclared function '__pci_ioport_map'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
                   return __pci_ioport_map(dev, start, len);
                          ^
   drivers/pci/iomap.c:43:10: note: did you mean 'devm_ioport_map'?
   include/linux/io.h:38:16: note: 'devm_ioport_map' declared here
   void __iomem * devm_ioport_map(struct device *dev, unsigned long port,
                  ^
>> drivers/pci/iomap.c:43:10: error: incompatible integer to pointer conversion returning 'int' from a function with result type 'void *' [-Wint-conversion]
                   return __pci_ioport_map(dev, start, len);
                          ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
   drivers/pci/iomap.c:67:15: error: redefinition of 'pci_iomap_wc_range'
   void __iomem *pci_iomap_wc_range(struct pci_dev *dev,
                 ^
   include/asm-generic/pci_iomap.h:50:29: note: previous definition is here
   static inline void __iomem *pci_iomap_wc_range(struct pci_dev *dev, int bar,
                               ^
   drivers/pci/iomap.c:110:15: error: redefinition of 'pci_iomap'
   void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long maxlen)
                 ^
   include/asm-generic/pci_iomap.h:35:29: note: previous definition is here
   static inline void __iomem *pci_iomap(struct pci_dev *dev, int bar, unsigned long max)
                               ^
   drivers/pci/iomap.c:131:15: error: redefinition of 'pci_iomap_wc'
   void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long maxlen)
                 ^
   include/asm-generic/pci_iomap.h:40:29: note: previous definition is here
   static inline void __iomem *pci_iomap_wc(struct pci_dev *dev, int bar, unsigned long max)
                               ^
   6 errors generated.

Kconfig warnings: (for reference only)
   WARNING: unmet direct dependencies detected for GENERIC_PCI_IOMAP
   Depends on [n]: PCI [=n]
   Selected by [y]:
   - ARM [=y]


vim +/__pci_ioport_map +43 drivers/pci/iomap.c

66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  11  
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  12  /**
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  13   * pci_iomap_range - create a virtual mapping cookie for a PCI BAR
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  14   * @dev: PCI device that owns the BAR
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  15   * @bar: BAR number
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  16   * @offset: map memory at the given offset in BAR
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  17   * @maxlen: max length of the memory to map
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  18   *
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  19   * Using this function you will get a __iomem address to your device BAR.
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  20   * You can access it using ioread*() and iowrite*(). These functions hide
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  21   * the details if this is a MMIO or PIO address space and will just do what
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  22   * you expect from them in the correct way.
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  23   *
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  24   * @maxlen specifies the maximum length to map. If you want to get access to
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  25   * the complete BAR from offset to the end, pass %0 here.
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  26   * */
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  27  void __iomem *pci_iomap_range(struct pci_dev *dev,
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  28  			      int bar,
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  29  			      unsigned long offset,
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  30  			      unsigned long maxlen)
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  31  {
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  32  	resource_size_t start = pci_resource_start(dev, bar);
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  33  	resource_size_t len = pci_resource_len(dev, bar);
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  34  	unsigned long flags = pci_resource_flags(dev, bar);
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  35  
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  36  	if (len <= offset || !start)
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  37  		return NULL;
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  38  	len -= offset;
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  39  	start += offset;
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  40  	if (maxlen && len > maxlen)
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  41  		len = maxlen;
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  42  	if (flags & IORESOURCE_IO)
b923650b84068b lib/pci_iomap.c Michael S. Tsirkin 2012-01-30 @43  		return __pci_ioport_map(dev, start, len);
92b19ff50e8f24 lib/pci_iomap.c Dan Williams       2015-08-10  44  	if (flags & IORESOURCE_MEM)
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  45  		return ioremap(start, len);
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  46  	/* What? */
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  47  	return NULL;
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  48  }
eb29d8d2aad706 lib/pci_iomap.c Michael S. Tsirkin 2013-05-29  49  EXPORT_SYMBOL(pci_iomap_range);
66eab4df288aae lib/pci_iomap.c Michael S. Tsirkin 2011-11-24  50  

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