Re: [PATCH v3 4/6] mm: ioremap: Add arch_ioremap/iounmap()

From: kernel test robot <lkp@intel.com>
To: Kefeng Wang <wangkefeng.wang@huawei.com>,
	catalin.marinas@arm.com, will@kernel.org,
	akpm@linux-foundation.org, linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org
Cc: kbuild-all@lists.01.org, linux-mm@kvack.org, hch@infradead.org,
	arnd@arndb.de, anshuman.khandual@arm.com,
	Kefeng Wang <wangkefeng.wang@huawei.com>
Subject: Re: [PATCH v3 4/6] mm: ioremap: Add arch_ioremap/iounmap()
Date: Tue, 24 May 2022 06:17:17 +0800	[thread overview]
Message-ID: <202205240657.BXxrhbgp-lkp@intel.com> (raw)
In-Reply-To: <20220519082552.117736-5-wangkefeng.wang@huawei.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 arnd-asm-generic/master akpm-mm/mm-everything linus/master v5.18 next-20220523]
[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/20220519-161853
base:   https://git.kernel.org/pub/scm/linux/kernel/git/arm64/linux.git for-next/core
config: csky-randconfig-s032-20220522 (https://download.01.org/0day-ci/archive/20220524/202205240657.BXxrhbgp-lkp@intel.com/config)
compiler: csky-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/eb83d30756d3b279ca58791d343dc821291818d0
        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/20220519-161853
        git checkout eb83d30756d3b279ca58791d343dc821291818d0
        # 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=csky SHELL=/bin/bash

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

sparse warnings: (new ones prefixed by >>)
>> mm/ioremap.c:59:16: sparse: sparse: incorrect type in argument 1 (different address spaces) @@     expected void const *addr @@     got void [noderef] __iomem *vaddr @@
   mm/ioremap.c:59:16: sparse:     expected void const *addr
   mm/ioremap.c:59:16: sparse:     got void [noderef] __iomem *vaddr

vim +59 mm/ioremap.c

    51	
    52	void iounmap(volatile void __iomem *addr)
    53	{
    54		void __iomem *vaddr = (void __iomem *)((unsigned long)addr & PAGE_MASK);
    55	
    56		if (arch_iounmap(vaddr))
    57			return;
    58	
  > 59		vunmap(vaddr);

-- 
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https://01.org/lkp