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Date:   Sun, 19 Nov 2023 17:13:48 +0800
From:   kernel test robot <lkp@intel.com>
To:     Bartosz Golaszewski <bartosz.golaszewski@linaro.org>
Cc:     llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev,
        linux-kernel@vger.kernel.org,
        Bjorn Andersson <andersson@kernel.org>,
        Krzysztof Kozlowski <krzk@kernel.org>,
        Maximilian Luz <luzmaximilian@gmail.com>
Subject: drivers/firmware/qcom/qcom_scm.c:1652:34: warning: unused variable
 'qcom_scm_qseecom_allowlist'
Message-ID: <202311191654.S4wlVUrz-lkp@intel.com>
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
Precedence: bulk

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   037266a5f7239ead1530266f7d7af153d2a867fa
commit: bdac188ec3c71800dd8419620224ee74ef37732a firmware: qcom: move Qualcomm code into its own directory
date:   4 weeks ago
config: s390-randconfig-002-20231119 (https://download.01.org/0day-ci/archive/20231119/202311191654.S4wlVUrz-lkp@intel.com/config)
compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20231119/202311191654.S4wlVUrz-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/202311191654.S4wlVUrz-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/firmware/qcom/qcom_scm.c:10:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:547:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     547 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:560:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     560 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:37:59: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) __swab16((__force __u16)(__le16)(x))
         |                                                           ^
   include/uapi/linux/swab.h:102:54: note: expanded from macro '__swab16'
     102 | #define __swab16(x) (__u16)__builtin_bswap16((__u16)(x))
         |                                                      ^
   In file included from drivers/firmware/qcom/qcom_scm.c:10:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:573:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     573 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/big_endian.h:35:59: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) __swab32((__force __u32)(__le32)(x))
         |                                                           ^
   include/uapi/linux/swab.h:115:54: note: expanded from macro '__swab32'
     115 | #define __swab32(x) (__u32)__builtin_bswap32((__u32)(x))
         |                                                      ^
   In file included from drivers/firmware/qcom/qcom_scm.c:10:
   In file included from include/linux/dma-mapping.h:11:
   In file included from include/linux/scatterlist.h:9:
   In file included from arch/s390/include/asm/io.h:78:
   include/asm-generic/io.h:584:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     584 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:594:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     594 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:604:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     604 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:692:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     692 |         readsb(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:700:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     700 |         readsw(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:708:20: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     708 |         readsl(PCI_IOBASE + addr, buffer, count);
         |                ~~~~~~~~~~ ^
   include/asm-generic/io.h:717:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     717 |         writesb(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   include/asm-generic/io.h:726:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     726 |         writesw(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
   include/asm-generic/io.h:735:21: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     735 |         writesl(PCI_IOBASE + addr, buffer, count);
         |                 ~~~~~~~~~~ ^
>> drivers/firmware/qcom/qcom_scm.c:1652:34: warning: unused variable 'qcom_scm_qseecom_allowlist' [-Wunused-const-variable]
    1652 | static const struct of_device_id qcom_scm_qseecom_allowlist[] = {
         |                                  ^
   13 warnings generated.


vim +/qcom_scm_qseecom_allowlist +1652 drivers/firmware/qcom/qcom_scm.c

00b1248606ba39 drivers/firmware/qcom_scm.c Maximilian Luz 2023-08-27  1647  
00b1248606ba39 drivers/firmware/qcom_scm.c Maximilian Luz 2023-08-27  1648  /*
00b1248606ba39 drivers/firmware/qcom_scm.c Maximilian Luz 2023-08-27  1649   * We do not yet support re-entrant calls via the qseecom interface. To prevent
00b1248606ba39 drivers/firmware/qcom_scm.c Maximilian Luz 2023-08-27  1650   + any potential issues with this, only allow validated machines for now.
00b1248606ba39 drivers/firmware/qcom_scm.c Maximilian Luz 2023-08-27  1651   */
00b1248606ba39 drivers/firmware/qcom_scm.c Maximilian Luz 2023-08-27 @1652  static const struct of_device_id qcom_scm_qseecom_allowlist[] = {
00b1248606ba39 drivers/firmware/qcom_scm.c Maximilian Luz 2023-08-27  1653  	{ .compatible = "lenovo,thinkpad-x13s", },
00b1248606ba39 drivers/firmware/qcom_scm.c Maximilian Luz 2023-08-27  1654  	{ }
00b1248606ba39 drivers/firmware/qcom_scm.c Maximilian Luz 2023-08-27  1655  };
00b1248606ba39 drivers/firmware/qcom_scm.c Maximilian Luz 2023-08-27  1656  

:::::: The code at line 1652 was first introduced by commit
:::::: 00b1248606ba3979ccae30ed11df8cdc1a84245a firmware: qcom_scm: Add support for Qualcomm Secure Execution Environment SCM interface

:::::: TO: Maximilian Luz <luzmaximilian@gmail.com>
:::::: CC: Bjorn Andersson <andersson@kernel.org>

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