linux-kernel - Re: [PATCH -next] fs: coda: Remove unused variable 'outp' in venus

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Date: Tue, 23 Jan 2024 20:18:50 -0500
From: Jan Harkes <jaharkes@...cmu.edu>
To: Yang Li <yang.lee@...ux.alibaba.com>
Cc: linux-kernel@...r.kernel.org
Subject: Re: [PATCH -next] fs: coda: Remove unused variable 'outp' in
 venus_rmdir

Thank you, but you sent the same patch in April 2021 and it resulted in
compile errors in the expansion of UPARG.

I assume this one will result in the same errors.

Jan


    [auto build test ERROR on linus/master]
    [also build test ERROR on v5.12-rc5 next-20210401]
    [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/Yang-Li/coda-Remove-various-instances-of-an-unused-variable-outp/20210402-173111
    base:
    https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
    1678e493d530e7977cce34e59a86bb86f3c5631e
    config: arc-randconfig-r014-20210402 (attached as .config)
    compiler: arceb-elf-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/b6484bc8a589df437829010ab82b49c48d56ee46
            git remote add linux-review https://github.com/0day-ci/linux
            git fetch --no-tags linux-review
    Yang-Li/coda-Remove-various-instances-of-an-unused-variable-outp/20210402-173111
            git checkout b6484bc8a589df437829010ab82b49c48d56ee46
            # save the attached .config to linux build tree
            COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross
    ARCH=arc

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

    All errors (new ones prefixed by >>):

       fs/coda/upcall.c: In function 'venus_setattr':
    >> fs/coda/upcall.c:65:9: error: 'outp' undeclared (first use in this
    >> function); did you mean 'outl'?
          65 |         outp = (union outputArgs *)(inp); \
             |         ^~~~
       fs/coda/upcall.c:118:2: note: in expansion of macro 'UPARG'
         118 |  UPARG(CODA_SETATTR);
             |  ^~~~~
       fs/coda/upcall.c:65:9: note: each undeclared identifier is reported
    only once for each function it appears in
          65 |         outp = (union outputArgs *)(inp); \
             |         ^~~~


On Wed, Jan 24, 2024 at 09:03:22AM +0800, Yang Li wrote:
> The variable 'outp' is declared but not used in the venus_rmdir
> function within the Coda filesystem module. This causes a compiler
> warning about the variable being set but not used.
> 
> To clean up the code and address the compiler warning, this patch
> removes the declaration of the unused 'outp' variable.
> 
> Signed-off-by: Yang Li <yang.lee@...ux.alibaba.com>
> ---
>  fs/coda/upcall.c | 1 -
>  1 file changed, 1 deletion(-)
> 
> diff --git a/fs/coda/upcall.c b/fs/coda/upcall.c
> index cd6a3721f6f6..d97e0e4374f9 100644
> --- a/fs/coda/upcall.c
> +++ b/fs/coda/upcall.c
> @@ -303,7 +303,6 @@ int venus_rmdir(struct super_block *sb, struct CodaFid *dirfid,
>  		    const char *name, int length)
>  {
>          union inputArgs *inp;
> -        union outputArgs *outp;
>          int insize, outsize, error;
>          int offset;
>  
> -- 
> 2.20.1.7.g153144c
> 
>