[litex-hub:litex-rebase 10/15] drivers/mtd/spi-nor/litex-spiflash.c:305:15: error: incompatible function pointer types initializing 'int (*)(struct spi_nor *, u8, const u8 *, size_t)' (aka 'int (*)(struct spi_nor *, unsigned char, const unsigned char *, unsigned long)') with an express...

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

tree:   https://github.com/litex-hub/linux litex-rebase
head:   bfdc7246bec114e599ddb68ba442ce88172537ed
commit: 7cbcc8cd508400e5b564e23a122126a13096c2f7 [10/15] LiteX: driver for SPI Flash (mtd) device
config: s390-allmodconfig (https://download.01.org/0day-ci/archive/20250217/202502170711.tNK4CFp1-lkp@intel.com/config)
compiler: clang version 19.1.3 (https://github.com/llvm/llvm-project ab51eccf88f5321e7c60591c5546b254b6afab99)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250217/202502170711.tNK4CFp1-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/202502170711.tNK4CFp1-lkp@intel.com/

All errors (new ones prefixed by >>):

   In file included from drivers/mtd/spi-nor/litex-spiflash.c:23:
   In file included from include/linux/module.h:19:
   In file included from include/linux/elf.h:6:
   In file included from arch/s390/include/asm/elf.h:181:
   In file included from arch/s390/include/asm/mmu_context.h:11:
   In file included from arch/s390/include/asm/pgalloc.h:18:
   In file included from include/linux/mm.h:2224:
   include/linux/vmstat.h:504:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     504 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     505 |                            item];
         |                            ~~~~
   include/linux/vmstat.h:511:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     511 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     512 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
   include/linux/vmstat.h:524:43: warning: arithmetic between different enumeration types ('enum zone_stat_item' and 'enum numa_stat_item') [-Wenum-enum-conversion]
     524 |         return vmstat_text[NR_VM_ZONE_STAT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~ ^
     525 |                            NR_VM_NUMA_EVENT_ITEMS +
         |                            ~~~~~~~~~~~~~~~~~~~~~~
>> drivers/mtd/spi-nor/litex-spiflash.c:305:15: error: incompatible function pointer types initializing 'int (*)(struct spi_nor *, u8, const u8 *, size_t)' (aka 'int (*)(struct spi_nor *, unsigned char, const unsigned char *, unsigned long)') with an expression of type 'ssize_t (struct spi_nor *, u8, const u8 *, size_t)' (aka 'long (struct spi_nor *, unsigned char, const unsigned char *, unsigned long)') [-Wincompatible-function-pointer-types]
     305 |         .write_reg = spi_flash_nor_write_reg,
         |                      ^~~~~~~~~~~~~~~~~~~~~~~
   3 warnings and 1 error generated.


vim +305 drivers/mtd/spi-nor/litex-spiflash.c

   300	
   301	static const struct spi_nor_controller_ops litex_spi_controller_ops = {
   302		.read = spi_flash_nor_read,
   303		.write = spi_flash_nor_write,
   304		.read_reg = spi_flash_nor_read_reg,
 > 305		.write_reg = spi_flash_nor_write_reg,
   306		.erase = spi_flash_nor_erase,
   307	};
   308	

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