linux-kernel - Re: [PATCH v2 1/2] mm/memfd: add ioctl(MEMFD_CHECK_IF

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Date:   Sat, 9 Sep 2023 04:02:10 +0800
From:   kernel test robot <lkp@...el.com>
To:     Michal Clapinski <mclapinski@...gle.com>,
        Jonathan Corbet <corbet@....net>,
        Mike Kravetz <mike.kravetz@...cle.com>,
        Muchun Song <muchun.song@...ux.dev>,
        Andrew Morton <akpm@...ux-foundation.org>,
        Hugh Dickins <hughd@...gle.com>,
        Shuah Khan <skhan@...uxfoundation.org>,
        Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        Arnd Bergmann <arnd@...db.de>, Yi Liu <yi.l.liu@...el.com>,
        Dominik Brodowski <linux@...inikbrodowski.net>,
        Hans Verkuil <hverkuil@...all.nl>,
        Steve French <stfrench@...rosoft.com>,
        Simon Ser <contact@...rsion.fr>,
        Jason Gunthorpe <jgg@...pe.ca>,
        Marc Dionne <marc.dionne@...istor.com>,
        Jiri Slaby <jirislaby@...nel.org>,
        David Howells <dhowells@...hat.com>,
        Luca Vizzarro <Luca.Vizzarro@....com>,
        Jeff Xu <jeffxu@...gle.com>, Aleksa Sarai <cyphar@...har.com>,
        Kees Cook <keescook@...omium.org>,
        Daniel Verkamp <dverkamp@...omium.org>,
        linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-kselftest@...r.kernel.org
Cc:     oe-kbuild-all@...ts.linux.dev,
        Linux Memory Management List <linux-mm@...ck.org>,
        Michal Clapinski <mclapinski@...gle.com>
Subject: Re: [PATCH v2 1/2] mm/memfd: add ioctl(MEMFD_CHECK_IF_ORIGINAL)

Hi Michal,

kernel test robot noticed the following build warnings:

[auto build test WARNING on akpm-mm/mm-everything]

url:    https://github.com/intel-lab-lkp/linux/commits/Michal-Clapinski/mm-memfd-add-ioctl-MEMFD_CHECK_IF_ORIGINAL/20230909-020048
base:   https://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm.git mm-everything
patch link:    https://lore.kernel.org/r/20230908175738.41895-2-mclapinski%40google.com
patch subject: [PATCH v2 1/2] mm/memfd: add ioctl(MEMFD_CHECK_IF_ORIGINAL)
config: riscv-allnoconfig (https://download.01.org/0day-ci/archive/20230909/202309090301.rMwXPz1I-lkp@intel.com/config)
compiler: riscv64-linux-gcc (GCC) 13.2.0
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230909/202309090301.rMwXPz1I-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@...el.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202309090301.rMwXPz1I-lkp@intel.com/

All warnings (new ones prefixed by >>):

>> mm/shmem.c:4480:13: warning: 'shmem_file_ioctl' defined but not used [-Wunused-function]
    4480 | static long shmem_file_ioctl(struct file *file, unsigned int cmd,
         |             ^~~~~~~~~~~~~~~~


vim +/shmem_file_ioctl +4480 mm/shmem.c

  4479	
> 4480	static long shmem_file_ioctl(struct file *file, unsigned int cmd,
  4481				     unsigned long arg)
  4482	{
  4483		return memfd_ioctl(file, cmd, arg);
  4484	}
  4485	

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki