Re: [PATCH v2 1/2] mmc: cqhci: Add cqhci_set_tran_desc() callback

[kernel test robot]

Hi Sergey,

kernel test robot noticed the following build warnings:

[auto build test WARNING on linus/master]
[also build test WARNING on ulf-hansson-mmc-mirror/next v6.6-rc3 next-20230929]
[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/Sergey-Khimich/mmc-cqhci-Add-cqhci_set_tran_desc-callback/20230926-170331
base:   linus/master
patch link:    https://lore.kernel.org/r/20230926090242.105020-2-serghox%40gmail.com
patch subject: [PATCH v2 1/2] mmc: cqhci: Add cqhci_set_tran_desc() callback
config: hexagon-allyesconfig (https://download.01.org/0day-ci/archive/20230930/202309300806.dcR19kcE-lkp@xxxxxxxxx/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/20230930/202309300806.dcR19kcE-lkp@xxxxxxxxx/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@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309300806.dcR19kcE-lkp@xxxxxxxxx/

All warnings (new ones prefixed by >>):

   In file included from drivers/mmc/host/sdhci_am654.c:9:
   In file included from include/linux/iopoll.h:14:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:337:
   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/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/mmc/host/sdhci_am654.c:9:
   In file included from include/linux/iopoll.h:14:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:337:
   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/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/mmc/host/sdhci_am654.c:9:
   In file included from include/linux/iopoll.h:14:
   In file included from include/linux/io.h:13:
   In file included from arch/hexagon/include/asm/io.h:337:
   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);
         |                                                       ~~~~~~~~~~ ^
   In file included from drivers/mmc/host/sdhci_am654.c:17:
>> drivers/mmc/host/cqhci.h:296:32: warning: declaration of 'struct mmc_data' will not be visible outside of this function [-Wvisibility]
     296 |         void (*prep_tran_desc)(struct mmc_data *data, struct cqhci_host *cq_host,
         |                                       ^
   7 warnings generated.


vim +296 drivers/mmc/host/cqhci.h

   281	
   282	struct cqhci_host_ops {
   283		void (*dumpregs)(struct mmc_host *mmc);
   284		void (*write_l)(struct cqhci_host *host, u32 val, int reg);
   285		u32 (*read_l)(struct cqhci_host *host, int reg);
   286		void (*enable)(struct mmc_host *mmc);
   287		void (*disable)(struct mmc_host *mmc, bool recovery);
   288		void (*update_dcmd_desc)(struct mmc_host *mmc, struct mmc_request *mrq,
   289					 u64 *data);
   290		void (*pre_enable)(struct mmc_host *mmc);
   291		void (*post_disable)(struct mmc_host *mmc);
   292	#ifdef CONFIG_MMC_CRYPTO
   293		int (*program_key)(struct cqhci_host *cq_host,
   294				   const union cqhci_crypto_cfg_entry *cfg, int slot);
   295	#endif
 > 296		void (*prep_tran_desc)(struct mmc_data *data, struct cqhci_host *cq_host,
   297				       u8 *desc, int sg_count);
   298	

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