Re: [PATCH v2 4/5] arm64: mm: Convert to GENERIC_IOREMAP

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

Hi Kefeng,

Thank you for the patch! Perhaps something to improve:

[auto build test WARNING on arm64/for-next/core]
[also build test WARNING on hnaz-mm/master arnd-asm-generic/master v5.18-rc4 next-20220429]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/intel-lab-lkp/linux/commits/Kefeng-Wang/arm64-Cleanup-ioremap-and-support-ioremap_prot/20220429-182215
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
config: arm64-randconfig-s032-20220429 (https://download.01.org/0day-ci/archive/20220430/202204300706.lSqtHOzz-lkp@intel.com/config)
compiler: aarch64-linux-gcc (GCC) 11.3.0
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: v0.6.4-dirty
        # https://github.com/intel-lab-lkp/linux/commit/77442d1fe8ed26b996b2b7d4464443a63097c434
        git remote add linux-review https://github.com/intel-lab-lkp/linux
        git fetch --no-tags linux-review Kefeng-Wang/arm64-Cleanup-ioremap-and-support-ioremap_prot/20220429-182215
        git checkout 77442d1fe8ed26b996b2b7d4464443a63097c434
        # save the config file
        mkdir build_dir && cp config build_dir/.config
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/mm/

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


sparse warnings: (new ones prefixed by >>)
>> arch/arm64/mm/ioremap.c:14:31: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void [noderef] __iomem * @@     got void * @@
   arch/arm64/mm/ioremap.c:14:31: sparse:     expected void [noderef] __iomem *
   arch/arm64/mm/ioremap.c:14:31: sparse:     got void *
   arch/arm64/mm/ioremap.c:18:31: sparse: sparse: incorrect type in return expression (different address spaces) @@     expected void [noderef] __iomem * @@     got void * @@
   arch/arm64/mm/ioremap.c:18:31: sparse:     expected void [noderef] __iomem *
   arch/arm64/mm/ioremap.c:18:31: sparse:     got void *
   arch/arm64/mm/ioremap.c:29:32: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const *x @@     got void [noderef] __iomem *addr @@
   arch/arm64/mm/ioremap.c:29:32: sparse:     expected void const *x
   arch/arm64/mm/ioremap.c:29:32: sparse:     got void [noderef] __iomem *addr

vim +14 arch/arm64/mm/ioremap.c

     6	
     7	void __iomem *arch_ioremap(phys_addr_t phys_addr, size_t size, unsigned long prot)
     8	{
     9		unsigned long last_addr = phys_addr + size - 1;
    10		int ret = -EINVAL;
    11	
    12		/* Don't allow outside PHYS_MASK */
    13		if (last_addr & ~PHYS_MASK)
  > 14			return ERR_PTR(ret);
    15	
    16		/* Don't allow RAM to be mapped. */
    17		if (WARN_ON(pfn_is_map_memory(__phys_to_pfn(phys_addr))))
    18			return ERR_PTR(ret);
    19	
    20		return NULL;
    21	}
    22	

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