Re: [PATCH v3 1/3] 9p: add support for root file systems

[kernel test robot]

Hi Changbin,

I love your patch! Perhaps something to improve:

[auto build test WARNING on lwn/docs-next]
[also build test WARNING on linus/master v5.13-rc5 next-20210604]
[cannot apply to v9fs/for-next]
[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/0day-ci/linux/commits/Changbin-Du/9p-add-support-for-root-file-systems/20210607-071229
base:   git://git.lwn.net/linux-2.6 docs-next
config: arm-allyesconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (GCC) 9.3.0
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://github.com/0day-ci/linux/commit/96098f751038703cc0fda4f018236d240a86930d
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Changbin-Du/9p-add-support-for-root-file-systems/20210607-071229
        git checkout 96098f751038703cc0fda4f018236d240a86930d
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=arm 

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

All warnings (new ones prefixed by >>):

>> fs/9p/v9fsroot.c:53:12: warning: no previous prototype for 'v9fs_root_data' [-Wmissing-prototypes]
      53 | int __init v9fs_root_data(char **dev, char **opts)
         |            ^~~~~~~~~~~~~~


vim +/v9fs_root_data +53 fs/9p/v9fsroot.c

    52	
  > 53	int __init v9fs_root_data(char **dev, char **opts)

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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