Re: [PATCH v4 3/3] serial: sc16is7xx: add support for EXAR XR20M1172 UART

[kernel test robot]

Hi Konstantin,

kernel test robot noticed the following build errors:

[auto build test ERROR on c6795fbffc4547b40933ec368200bd4926a41b44]

url:    https://github.com/intel-lab-lkp/linux/commits/Konstantin-Pugin/serial-sc16is7xx-announce-support-of-SER_RS485_RTS_ON_SEND/20240420-004819
base:   c6795fbffc4547b40933ec368200bd4926a41b44
patch link:    https://lore.kernel.org/r/20240419124506.1531035-4-rilian.la.te%40ya.ru
patch subject: [PATCH v4 3/3] serial: sc16is7xx: add support for EXAR XR20M1172 UART
config: hexagon-randconfig-001-20240420 (https://download.01.org/0day-ci/archive/20240420/202404201559.2eM6MALu-lkp@xxxxxxxxx/config)
compiler: clang version 19.0.0git (https://github.com/llvm/llvm-project 7089c359a3845323f6f30c44a47dd901f2edfe63)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240420/202404201559.2eM6MALu-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/202404201559.2eM6MALu-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   In file included from drivers/tty/serial/sc16is7xx_spi.c:7:
   In file included from include/linux/regmap.h:20:
   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:328:
   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/tty/serial/sc16is7xx_spi.c:7:
   In file included from include/linux/regmap.h:20:
   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:328:
   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/tty/serial/sc16is7xx_spi.c:7:
   In file included from include/linux/regmap.h:20:
   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:328:
   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/tty/serial/sc16is7xx_spi.c:8:
   In file included from include/linux/spi/spi.h:17:
   In file included from include/linux/scatterlist.h:8:
   In file included from include/linux/mm.h:2208:
   include/linux/vmstat.h:522:36: warning: arithmetic between different enumeration types ('enum node_stat_item' and 'enum lru_list') [-Wenum-enum-conversion]
     522 |         return node_stat_name(NR_LRU_BASE + lru) + 3; // skip "nr_"
         |                               ~~~~~~~~~~~ ^ ~~~
>> drivers/tty/serial/sc16is7xx_spi.c:72:34: error: use of undeclared identifier 'xr20m1172_devtype'
      72 |         { "xr20m1172",  (kernel_ulong_t)&xr20m1172_devtype, },
         |                                          ^
   7 warnings and 1 error generated.


vim +/xr20m1172_devtype +72 drivers/tty/serial/sc16is7xx_spi.c

    63	
    64	static const struct spi_device_id sc16is7xx_spi_id_table[] = {
    65		{ "sc16is74x",	(kernel_ulong_t)&sc16is74x_devtype, },
    66		{ "sc16is740",	(kernel_ulong_t)&sc16is74x_devtype, },
    67		{ "sc16is741",	(kernel_ulong_t)&sc16is74x_devtype, },
    68		{ "sc16is750",	(kernel_ulong_t)&sc16is750_devtype, },
    69		{ "sc16is752",	(kernel_ulong_t)&sc16is752_devtype, },
    70		{ "sc16is760",	(kernel_ulong_t)&sc16is760_devtype, },
    71		{ "sc16is762",	(kernel_ulong_t)&sc16is762_devtype, },
  > 72		{ "xr20m1172",	(kernel_ulong_t)&xr20m1172_devtype, },
    73		{ }
    74	};
    75	MODULE_DEVICE_TABLE(spi, sc16is7xx_spi_id_table);
    76	

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