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Date:   Sat, 9 Jan 2021 09:10:06 +0800
From:   kernel test robot <lkp@...el.com>
To:     Jeremy Linton <jeremy.linton@....com>, linux-mmc@...r.kernel.org
Cc:     kbuild-all@...ts.01.org, clang-built-linux@...glegroups.com,
        bcm-kernel-feedback-list@...adcom.com, sbranden@...adcom.com,
        rjui@...adcom.com, ulf.hansson@...aro.org, adrian.hunter@...el.com,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        f.fainelli@...il.com, Jeremy Linton <jeremy.linton@....com>
Subject: Re: [PATCH] mmc: sdhci-iproc: Add ACPI bindings for the rpi4

Hi Jeremy,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on linus/master]
[also build test WARNING on v5.11-rc2 next-20210108]
[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]

url:    https://github.com/0day-ci/linux/commits/Jeremy-Linton/mmc-sdhci-iproc-Add-ACPI-bindings-for-the-rpi4/20210109-051645
base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 6279d812eab67a6df6b22fa495201db6f2305924
config: riscv-randconfig-r012-20210108 (attached as .config)
compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bc556e5685c0f97e79fb7b3c6f15cc5062db8e36)
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
        # install riscv cross compiling tool for clang build
        # apt-get install binutils-riscv64-linux-gnu
        # https://github.com/0day-ci/linux/commit/659eacf5a5de971ea94390dd6c7443c82d53ea5e
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Jeremy-Linton/mmc-sdhci-iproc-Add-ACPI-bindings-for-the-rpi4/20210109-051645
        git checkout 659eacf5a5de971ea94390dd6c7443c82d53ea5e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 

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

All warnings (new ones prefixed by >>):

   In file included from drivers/mmc/host/sdhci-iproc.c:24:
   In file included from drivers/mmc/host/sdhci-pltfm.h:13:
   In file included from drivers/mmc/host/sdhci.h:13:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:556:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return inb(addr);
                  ^~~~~~~~~
   arch/riscv/include/asm/io.h:55:76: note: expanded from macro 'inb'
   #define inb(c)          ({ u8  __v; __io_pbr(); __v = readb_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
                                                                           ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:87:48: note: expanded from macro 'readb_cpu'
   #define readb_cpu(c)            ({ u8  __r = __raw_readb(c); __r; })
                                                            ^
   In file included from drivers/mmc/host/sdhci-iproc.c:24:
   In file included from drivers/mmc/host/sdhci-pltfm.h:13:
   In file included from drivers/mmc/host/sdhci.h:13:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:564:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return inw(addr);
                  ^~~~~~~~~
   arch/riscv/include/asm/io.h:56:76: note: expanded from macro 'inw'
   #define inw(c)          ({ u16 __v; __io_pbr(); __v = readw_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
                                                                           ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:88:76: note: expanded from macro 'readw_cpu'
   #define readw_cpu(c)            ({ u16 __r = le16_to_cpu((__force __le16)__raw_readw(c)); __r; })
                                                                                        ^
   include/uapi/linux/byteorder/little_endian.h:36:51: note: expanded from macro '__le16_to_cpu'
   #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
                                                     ^
   In file included from drivers/mmc/host/sdhci-iproc.c:24:
   In file included from drivers/mmc/host/sdhci-pltfm.h:13:
   In file included from drivers/mmc/host/sdhci.h:13:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:572:9: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return inl(addr);
                  ^~~~~~~~~
   arch/riscv/include/asm/io.h:57:76: note: expanded from macro 'inl'
   #define inl(c)          ({ u32 __v; __io_pbr(); __v = readl_cpu((void*)(PCI_IOBASE + (c))); __io_par(__v); __v; })
                                                                           ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:89:76: note: expanded from macro 'readl_cpu'
   #define readl_cpu(c)            ({ u32 __r = le32_to_cpu((__force __le32)__raw_readl(c)); __r; })
                                                                                        ^
   include/uapi/linux/byteorder/little_endian.h:34:51: note: expanded from macro '__le32_to_cpu'
   #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
                                                     ^
   In file included from drivers/mmc/host/sdhci-iproc.c:24:
   In file included from drivers/mmc/host/sdhci-pltfm.h:13:
   In file included from drivers/mmc/host/sdhci.h:13:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:580:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           outb(value, addr);
           ^~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:59:68: note: expanded from macro 'outb'
   #define outb(v,c)       ({ __io_pbw(); writeb_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
                                                                 ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:91:52: note: expanded from macro 'writeb_cpu'
   #define writeb_cpu(v, c)        ((void)__raw_writeb((v), (c)))
                                                             ^
   In file included from drivers/mmc/host/sdhci-iproc.c:24:
   In file included from drivers/mmc/host/sdhci-pltfm.h:13:
   In file included from drivers/mmc/host/sdhci.h:13:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:588:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           outw(value, addr);
           ^~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:60:68: note: expanded from macro 'outw'
   #define outw(v,c)       ({ __io_pbw(); writew_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
                                                                 ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:92:76: note: expanded from macro 'writew_cpu'
   #define writew_cpu(v, c)        ((void)__raw_writew((__force u16)cpu_to_le16(v), (c)))
                                                                                     ^
   In file included from drivers/mmc/host/sdhci-iproc.c:24:
   In file included from drivers/mmc/host/sdhci-pltfm.h:13:
   In file included from drivers/mmc/host/sdhci.h:13:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:596:2: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           outl(value, addr);
           ^~~~~~~~~~~~~~~~~
   arch/riscv/include/asm/io.h:61:68: note: expanded from macro 'outl'
   #define outl(v,c)       ({ __io_pbw(); writel_cpu((v),(void*)(PCI_IOBASE + (c))); __io_paw(); })
                                                                 ~~~~~~~~~~ ^
   arch/riscv/include/asm/mmio.h:93:76: note: expanded from macro 'writel_cpu'
   #define writel_cpu(v, c)        ((void)__raw_writel((__force u32)cpu_to_le32(v), (c)))
                                                                                     ^
   In file included from drivers/mmc/host/sdhci-iproc.c:24:
   In file included from drivers/mmc/host/sdhci-pltfm.h:13:
   In file included from drivers/mmc/host/sdhci.h:13:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/riscv/include/asm/io.h:149:
   include/asm-generic/io.h:1005:55: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
           return (port > MMIO_UPPER_LIMIT) ? NULL : PCI_IOBASE + port;
                                                     ~~~~~~~~~~ ^
>> drivers/mmc/host/sdhci-iproc.c:272:38: warning: unused variable 'bcm_arasan_data' [-Wunused-const-variable]
   static const struct sdhci_iproc_data bcm_arasan_data = {
                                        ^
   8 warnings generated.


vim +/bcm_arasan_data +272 drivers/mmc/host/sdhci-iproc.c

   271	
 > 272	static const struct sdhci_iproc_data bcm_arasan_data = {
   273		.pdata = &sdhci_bcm_arasan_data,
   274	};
   275	

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

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