[linux-next:master 7820/7824] drivers/sh/clk/cpg.c:49:9: error: assignment to 'unsigned int from incompatible pointer type 'unsigned int void

[kernel test robot <lkp@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
head:   be978f8feb1d4678b941a3ccf181eea1039110e2
commit: a28c9475256ffcbc9fb715b316fcb5e95e4df9be [7820/7824] sh: clkfwk: remove r8/r16/r32
config: sh-se7721_defconfig (attached as .config)
compiler: sh4-linux-gcc (GCC) 9.3.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout a28c9475256ffcbc9fb715b316fcb5e95e4df9be
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=sh 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

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 (*)(void *)' from incompatible pointer type 'unsigned int (*)(const void *)' [-Werror=incompatible-pointer-types]
      49 |    read = ioread8;
         |         ^
   drivers/sh/clk/cpg.c:51:9: error: assignment to 'unsigned int (*)(void *)' from incompatible pointer type 'unsigned int (*)(const void *)' [-Werror=incompatible-pointer-types]
      51 |    read = ioread16;
         |         ^
   drivers/sh/clk/cpg.c:53:9: error: assignment to 'unsigned int (*)(void *)' from incompatible pointer type 'unsigned int (*)(const 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)(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@xxxxxxxxxxxx

Attachment: .config.gz
Description: application/gzip