linux-kernel - Re: drivers/infiniband/hw/irdma/uk.c:934:6: warning: variable 'total

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Date:   Mon, 5 Jul 2021 13:04:21 -0300
From:   Jason Gunthorpe <jgg@...dia.com>
To:     kernel test robot <lkp@...el.com>,
        Tatyana Nikolova <tatyana.e.nikolova@...el.com>,
        Mustafa Ismail <mustafa.ismail@...el.com>
Cc:     Shiraz Saleem <shiraz.saleem@...el.com>,
        clang-built-linux@...glegroups.com, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org
Subject: Re: drivers/infiniband/hw/irdma/uk.c:934:6: warning: variable
 'total_size' set but not used

On Fri, Jul 02, 2021 at 09:15:24AM +0800, kernel test robot wrote:
> Hi Shiraz,
> 
> First bad commit (maybe != root cause):
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   e04360a2ea01bf42aa639b65aad81f502e896c7f
> commit: fa0cf568fd76550c1ddb806c03a65a1a4a1ea909 RDMA/irdma: Add irdma Kconfig/Makefile and remove i40iw
> date:   4 weeks ago
> config: arm-randconfig-r005-20210701 (attached as .config)
> compiler: clang version 13.0.0 (https://github.com/llvm/llvm-project e7e71e9454ed76c1b3d8140170b5333c28bef1be)
> 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 arm cross compiling tool for clang build
>         # apt-get install binutils-arm-linux-gnueabi
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fa0cf568fd76550c1ddb806c03a65a1a4a1ea909
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout fa0cf568fd76550c1ddb806c03a65a1a4a1ea909
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=arm 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All warnings (new ones prefixed by >>):
> 
> >> drivers/infiniband/hw/irdma/uk.c:934:6: warning: variable 'total_size' set but not used [-Wunused-but-set-variable]
>            u32 total_size = 0, wqe_idx, i, byte_off;
>                ^
>    1 warning generated.

Yes, Tatyana please send a patch

Thanks,
Jason