Re: [PATCH 2/2] mailbox: ti-msgmgr: Allow building under COMPILE_TEST

[kernel test robot <lkp@intel.com>]

Hi Andrew,

kernel test robot noticed the following build warnings:

[auto build test WARNING on soc/for-next]
[also build test WARNING on linus/master v6.12-rc3 next-20241015]
[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/Andrew-Davis/mailbox-ti-msgmgr-Remove-use-of-of_match_ptr-helper/20241014-225353
base:   https://git.kernel.org/pub/scm/linux/kernel/git/soc/soc.git for-next
patch link:    https://lore.kernel.org/r/20241014144821.15094-3-afd%40ti.com
patch subject: [PATCH 2/2] mailbox: ti-msgmgr: Allow building under COMPILE_TEST
config: hexagon-randconfig-r131-20241015 (https://download.01.org/0day-ci/archive/20241016/202410160435.WzzQa1p5-lkp@intel.com/config)
compiler: clang version 20.0.0git (https://github.com/llvm/llvm-project 70e0a7e7e6a8541bcc46908c592eed561850e416)
reproduce: (https://download.01.org/0day-ci/archive/20241016/202410160435.WzzQa1p5-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/202410160435.WzzQa1p5-lkp@intel.com/

All warnings (new ones prefixed by >>):

   In file included from drivers/firmware/ti_sci.c:14:
   In file included from include/linux/io.h:14:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:548:31: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     548 |         val = __raw_readb(PCI_IOBASE + addr);
         |                           ~~~~~~~~~~ ^
   include/asm-generic/io.h:561:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     561 |         val = __le16_to_cpu((__le16 __force)__raw_readw(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:37:51: note: expanded from macro '__le16_to_cpu'
      37 | #define __le16_to_cpu(x) ((__force __u16)(__le16)(x))
         |                                                   ^
   In file included from drivers/firmware/ti_sci.c:14:
   In file included from include/linux/io.h:14:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:574:61: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     574 |         val = __le32_to_cpu((__le32 __force)__raw_readl(PCI_IOBASE + addr));
         |                                                         ~~~~~~~~~~ ^
   include/uapi/linux/byteorder/little_endian.h:35:51: note: expanded from macro '__le32_to_cpu'
      35 | #define __le32_to_cpu(x) ((__force __u32)(__le32)(x))
         |                                                   ^
   In file included from drivers/firmware/ti_sci.c:14:
   In file included from include/linux/io.h:14:
   In file included from arch/hexagon/include/asm/io.h:328:
   include/asm-generic/io.h:585:33: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     585 |         __raw_writeb(value, PCI_IOBASE + addr);
         |                             ~~~~~~~~~~ ^
   include/asm-generic/io.h:595:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     595 |         __raw_writew((u16 __force)cpu_to_le16(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   include/asm-generic/io.h:605:59: warning: performing pointer arithmetic on a null pointer has undefined behavior [-Wnull-pointer-arithmetic]
     605 |         __raw_writel((u32 __force)cpu_to_le32(value), PCI_IOBASE + addr);
         |                                                       ~~~~~~~~~~ ^
   drivers/firmware/ti_sci.c:200:20: warning: unused function 'ti_sci_debugfs_destroy' [-Wunused-function]
     200 | static inline void ti_sci_debugfs_destroy(struct platform_device *dev,
         |                    ^~~~~~~~~~~~~~~~~~~~~~
>> drivers/firmware/ti_sci.c:3285:34: warning: unused variable 'ti_sci_of_match' [-Wunused-const-variable]
    3285 | static const struct of_device_id ti_sci_of_match[] = {
         |                                  ^~~~~~~~~~~~~~~
   8 warnings generated.


vim +/ti_sci_of_match +3285 drivers/firmware/ti_sci.c

aa276781a64a5f Nishanth Menon 2016-10-18  3284  
aa276781a64a5f Nishanth Menon 2016-10-18 @3285  static const struct of_device_id ti_sci_of_match[] = {
aa276781a64a5f Nishanth Menon 2016-10-18  3286  	{.compatible = "ti,k2g-sci", .data = &ti_sci_pmmc_k2g_desc},
754c9477ae7872 Peter Ujfalusi 2019-04-30  3287  	{.compatible = "ti,am654-sci", .data = &ti_sci_pmmc_am654_desc},
aa276781a64a5f Nishanth Menon 2016-10-18  3288  	{ /* Sentinel */ },
aa276781a64a5f Nishanth Menon 2016-10-18  3289  };
aa276781a64a5f Nishanth Menon 2016-10-18  3290  MODULE_DEVICE_TABLE(of, ti_sci_of_match);
aa276781a64a5f Nishanth Menon 2016-10-18  3291  

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