linux-kernel - Re: [PATCH] riscv: Support non-coherency memory model

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Date:   Tue, 23 Apr 2019 08:31:15 +0800
From:   kbuild test robot <lkp@...el.com>
To:     guoren@...nel.org
Cc:     kbuild-all@...org, ren_guo@...ky.com, guoren@...nel.org,
        linux-riscv@...ts.infradead.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org, tech-privileged@...ts.riscv.org,
        Andrew Waterman <andrew@...ive.com>,
        Anup Patel <anup.patel@....com>, Arnd Bergmann <arnd@...db.de>,
        Christoph Hellwig <hch@....de>,
        Greentime Hu <green.hu@...il.com>,
        Marek Szyprowski <m.szyprowski@...sung.com>,
        Mike Rapoport <rppt@...ux.ibm.com>,
        Palmer Dabbelt <palmer@...ive.com>,
        Robin Murphy <robin.murphy@....com>,
        Scott Wood <swood@...hat.com>,
        Vincent Chen <vincentc@...estech.com>,
        Xiang Xiaoyan <xiaoyan_xiang@...ky.com>
Subject: Re: [PATCH] riscv: Support non-coherency memory model

Hi,

I love your patch! Yet something to improve:

[auto build test ERROR on linus/master]
[also build test ERROR on v5.1-rc6 next-20190418]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]

url:    https://github.com/0day-ci/linux/commits/guoren-kernel-org/riscv-Support-non-coherency-memory-model/20190423-075013
config: riscv-tinyconfig (attached as .config)
compiler: riscv64-linux-gcc (GCC) 8.1.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        GCC_VERSION=8.1.0 make.cross ARCH=riscv 

If you fix the issue, kindly add following tag
Reported-by: kbuild test robot <lkp@...el.com>


All errors (new ones prefixed by >>):

   arch/riscv/mm/dma-mapping.c: In function 'arch_dma_prep_coherent':
>> arch/riscv/mm/dma-mapping.c:15:2: error: implicit declaration of function 'sbi_fence_dma' [-Werror=implicit-function-declaration]
     sbi_fence_dma(page_to_phys(page), size, DMA_BIDIRECTIONAL);
     ^~~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/sbi_fence_dma +15 arch/riscv/mm/dma-mapping.c

    10	
    11	void arch_dma_prep_coherent(struct page *page, size_t size)
    12	{
    13		memset(page_address(page), 0, size);
    14	
  > 15		sbi_fence_dma(page_to_phys(page), size, DMA_BIDIRECTIONAL);
    16	}
    17	

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0-DAY kernel test infrastructure                Open Source Technology Center
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