linux-kernel - Re: arch/mips/bmips/dma.c:7:6: warning: no previous prototype for 'arch_sync_dma_for_cpu

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Date:   Sun, 22 May 2022 09:50:04 -0400
From:   Jim Quinlan <jim2101024@...il.com>
To:     kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, open list <linux-kernel@...r.kernel.org>,
        Thomas Bogendoerfer <tsbogend@...ha.franken.de>
Subject: Re: arch/mips/bmips/dma.c:7:6: warning: no previous prototype for 'arch_sync_dma_for_cpu_all'

On Sat, May 21, 2022 at 7:16 PM kernel test robot <lkp@...el.com> wrote:
>
> Hi Jim,get_mac_address(struct device_node *np, u8 *mac)

$ stbsrv-and-01  3:51pm  [Cwd: /work3/jq921458/git/up-linux-arm64]
                         [Git: pci-regression-for-cm4-w1-v1  2dda4836141d]
$
>
> FYI, the error/warning still remains.
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   6c3f5bec9b40b9437410abb08eccd5cdd1598a3c
> commit: d552ddeaab4a15a8dc157ac007833aa0b3706862 MIPS: bmips: Remove obsolete DMA mapping support
> date:   4 months ago
> config: mips-randconfig-r004-20220522 (https://download.01.org/0day-ci/archive/20220522/202205220745.AYB1Q33g-lkp@intel.com/config)
> compiler: mips-linux-gcc (GCC) 11.3.0
> reproduce (this is a W=1 build):
>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>         chmod +x ~/bin/make.cross
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=d552ddeaab4a15a8dc157ac007833aa0b3706862
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout d552ddeaab4a15a8dc157ac007833aa0b3706862
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.3.0 make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash arch/mips/bmips/
>
> If you fix the issue, kindly add following tag where applicable
> Reported-by: kernel test robot <lkp@...el.com>
>
> All warnings (new ones prefixed by >>):
>
> >> arch/mips/bmips/dma.c:7:6: warning: no previous prototype for 'arch_sync_dma_for_cpu_all' [-Wmissing-prototypes]
>        7 | void arch_sync_dma_for_cpu_all(void)
>          |      ^~~~~~~~~~~~~~~~~~~~~~~~~
>
>
> vim +/arch_sync_dma_for_cpu_all +7 arch/mips/bmips/dma.c

Hello,
I will take care of this ASAP.
Regards,
Jim Quinlan
Broadcom STB

>
> d666cd0246f78b arch/mips/bcm3384/dma.c Kevin Cernekee    2014-10-20  6
> 56e35f9c5b87ec arch/mips/bmips/dma.c   Christoph Hellwig 2019-11-07 @7  void arch_sync_dma_for_cpu_all(void)
>
> :::::: The code at line 7 was first introduced by commit
> :::::: 56e35f9c5b87ec1ae93e483284e189c84388de16 dma-mapping: drop the dev argument to arch_sync_dma_for_*
>
> :::::: TO: Christoph Hellwig <hch@....de>
> :::::: CC: Christoph Hellwig <hch@....de>
>
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp