Re: [linux-next:master 6011/11791] fs/nfs/super.c:90:40: warning: unused variable 'nfs_ssc_clnt_ops_tbl'

From: Souptick Joarder <jrdr.linux@gmail.com>
To: kernel test robot <lkp@intel.com>
Cc: Dai Ngo <dai.ngo@oracle.com>,
	kbuild-all@lists.01.org,  clang-built-linux@googlegroups.com,
	 Linux Memory Management List <linux-mm@kvack.org>,
	Chuck Lever <chuck.lever@oracle.com>
Subject: Re: [linux-next:master 6011/11791] fs/nfs/super.c:90:40: warning: unused variable 'nfs_ssc_clnt_ops_tbl'
Date: Tue, 23 Feb 2021 01:32:09 +0530	[thread overview]
Message-ID: <CAFqt6zbmMj5wtRp8kuy-QhZ+KxXLAzj8eP==YWnpEFq8fxqoVA@mail.gmail.com> (raw)
In-Reply-To: <202102192159.vSI24Z2E-lkp@intel.com>

On Fri, Feb 19, 2021 at 6:34 PM kernel test robot <lkp@intel.com> wrote:
>
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> head:   ff90dfd2579b2c7bc1f0baa0cb99c918c6c1ec64
> commit: 02591f9febd5f69bb4c266a4abf899c4cf21964f [6011/11791] NFSv4_2: SSC helper should use its own config.
> config: x86_64-randconfig-r034-20210219 (attached as .config)
> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
> 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
>         # install x86_64 cross compiling tool for clang build
>         # apt-get install binutils-x86-64-linux-gnu
>         # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=02591f9febd5f69bb4c266a4abf899c4cf21964f
>         git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
>         git fetch --no-tags linux-next master
>         git checkout 02591f9febd5f69bb4c266a4abf899c4cf21964f
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=x86_64
>
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@intel.com>
>
> All warnings (new ones prefixed by >>):
>
> >> fs/nfs/super.c:90:40: warning: unused variable 'nfs_ssc_clnt_ops_tbl' [-Wunused-const-variable]
>    static const struct nfs_ssc_client_ops nfs_ssc_clnt_ops_tbl = {
>                                           ^
>    1 warning generated.
> --
> >> fs/nfs/nfs4file.c:410:41: warning: unused variable 'nfs4_ssc_clnt_ops_tbl' [-Wunused-const-variable]
>    static const struct nfs4_ssc_client_ops nfs4_ssc_clnt_ops_tbl = {
>                                            ^
>    1 warning generated.
>

CONFIG_NFSD_V4 not defined.

>
> vim +/nfs_ssc_clnt_ops_tbl +90 fs/nfs/super.c
>
> f7b422b17ee5ee David Howells 2006-06-09  88
> 02591f9febd5f6 Dai Ngo       2021-01-28  89  #ifdef CONFIG_NFS_V4_2
> 0cfcd405e758ba Dai Ngo       2020-10-18 @90  static const struct nfs_ssc_client_ops nfs_ssc_clnt_ops_tbl = {
> 0cfcd405e758ba Dai Ngo       2020-10-18  91     .sco_sb_deactive = nfs_sb_deactive,
> 0cfcd405e758ba Dai Ngo       2020-10-18  92  };
> 02591f9febd5f6 Dai Ngo       2021-01-28  93  #endif
> 0cfcd405e758ba Dai Ngo       2020-10-18  94
>
> :::::: The code at line 90 was first introduced by commit
> :::::: 0cfcd405e758ba1d277e58436fb32f06888c3e41 NFSv4.2: Fix NFS4ERR_STALE error when doing inter server copy
>
> :::::: TO: Dai Ngo <dai.ngo@oracle.com>
> :::::: CC: J. Bruce Fields <bfields@redhat.com>
>
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org