arch/mips/n64/init.c:57:38: sparse: sparse: incorrect type in argument 2 (different address spaces)

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   ad9f25d338605d26acedcaf3ba5fab5ca26f1c10
commit: baec970aa5ba11099ad7a91773350c91fb2113f0 mips: Add N64 machine type
date:   4 months ago
config: mips-randconfig-s032-20210526 (attached as .config)
compiler: mips-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
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=baec970aa5ba11099ad7a91773350c91fb2113f0
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout baec970aa5ba11099ad7a91773350c91fb2113f0
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=mips 

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


sparse warnings: (new ones prefixed by >>)
   command-line: note: in included file:
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQUIRE redefined
   builtin:0:0: sparse: this was the original definition
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_SEQ_CST redefined
   builtin:0:0: sparse: this was the original definition
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_ACQ_REL redefined
   builtin:0:0: sparse: this was the original definition
   builtin:1:9: sparse: sparse: preprocessor token __ATOMIC_RELEASE redefined
   builtin:0:0: sparse: this was the original definition
>> arch/mips/n64/init.c:57:38: sparse: sparse: incorrect type in argument 2 (different address spaces) @@     expected void volatile [noderef] __iomem *mem @@     got unsigned int [usertype] * @@
   arch/mips/n64/init.c:57:38: sparse:     expected void volatile [noderef] __iomem *mem
   arch/mips/n64/init.c:57:38: sparse:     got unsigned int [usertype] *

vim +57 arch/mips/n64/init.c

    54	
    55	static void __init n64rdp_write_reg(const u8 reg, const u32 value)
    56	{
  > 57		__raw_writel(value, REG_BASE + reg);
    58	}
    59	

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

Attachment: .config.gz
Description: application/gzip