linux-kernel - Re: [PATCH v3 4/6] mm: ioremap: Add arch

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Date:   Tue, 24 May 2022 17:48:59 +0800
From:   Kefeng Wang <wangkefeng.wang@...wei.com>
To:     kernel test robot <lkp@...el.com>, <catalin.marinas@....com>,
        <will@...nel.org>, <akpm@...ux-foundation.org>,
        <linux-arm-kernel@...ts.infradead.org>,
        <linux-kernel@...r.kernel.org>
CC:     <kbuild-all@...ts.01.org>, <linux-mm@...ck.org>,
        <hch@...radead.org>, <arnd@...db.de>, <anshuman.khandual@....com>
Subject: Re: [PATCH v3 4/6] mm: ioremap: Add arch_ioremap/iounmap()


On 2022/5/24 6:17, kernel test robot wrote:
> 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@...el.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);

1) Will add generic "arch_ioremap/arch_iounmap define"

2) and change this to vunmap((void *)vaddr);

>