[morimoto-linux:fw-cleanup-2020-04-24-v1 162/228] drivers/sh/clk/cpg.c:49:9: error: assignment to 'unsigned int (*)(const void *)' from incompatible pointer type 'unsigned int (*)(void *)'

[morimoto-linux:fw-cleanup-2020-04-24-v1 162/228] drivers/sh/clk/cpg.c:49:9: error: assignment to 'unsigned int (*)(const void *)' from incompatible pointer type 'unsigned int (*)(void *)'

[kbuild test robot]

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tree:   https://github.com/morimoto/linux fw-cleanup-2020-04-24-v1
head:   6caccf92d24f1bb811fd11a50c53a565acbe85d2
commit: 819871d680afed628021001554e93056c44b1e9b [162/228] sh: clkfwk: remove r8/r16/r32
config: sh-allmodconfig (attached as .config)
compiler: sh4-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout 819871d680afed628021001554e93056c44b1e9b
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=sh 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kbuild test robot <lkp@intel.com>

All errors (new ones prefixed by >>):

   drivers/sh/clk/cpg.c: In function 'sh_clk_mstp_enable':
>> drivers/sh/clk/cpg.c:49:9: error: assignment to 'unsigned int (*)(const void *)' from incompatible pointer type 'unsigned int (*)(void *)' [-Werror=incompatible-pointer-types]
      49 |    read = ioread8;
         |         ^
   drivers/sh/clk/cpg.c:51:9: error: assignment to 'unsigned int (*)(const void *)' from incompatible pointer type 'unsigned int (*)(void *)' [-Werror=incompatible-pointer-types]
      51 |    read = ioread16;
         |         ^
   drivers/sh/clk/cpg.c:53:9: error: assignment to 'unsigned int (*)(const void *)' from incompatible pointer type 'unsigned int (*)(void *)' [-Werror=incompatible-pointer-types]
      53 |    read = ioread32;
         |         ^
   cc1: some warnings being treated as errors

vim +49 drivers/sh/clk/cpg.c

    38	
    39	static int sh_clk_mstp_enable(struct clk *clk)
    40	{
    41		sh_clk_write(sh_clk_read(clk) & ~(1 << clk->enable_bit), clk);
    42		if (clk->status_reg) {
    43			unsigned int (*read)(const void __iomem *addr);
    44			int i;
    45			void __iomem *mapped_status = (phys_addr_t)clk->status_reg -
    46				(phys_addr_t)clk->enable_reg + clk->mapped_reg;
    47	
    48			if (clk->flags & CLK_ENABLE_REG_8BIT)
  > 49				read = ioread8;
    50			else if (clk->flags & CLK_ENABLE_REG_16BIT)
    51				read = ioread16;
    52			else
    53				read = ioread32;
    54	
    55			for (i = 1000;
    56			     (read(mapped_status) & (1 << clk->enable_bit)) && i;
    57			     i--)
    58				cpu_relax();
    59			if (!i) {
    60				pr_err("cpg: failed to enable %p[%d]\n",
    61				       clk->enable_reg, clk->enable_bit);
    62				return -ETIMEDOUT;
    63			}
    64		}
    65		return 0;
    66	}
    67	

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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