netdev - Re: [PATCH bpf-next v3 07/15] i40e: separate kernel allocated rx_bi rings from AF

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Date:   Tue, 19 May 2020 09:55:39 -0700
From:   Jakub Kicinski <kuba@...nel.org>
To:     Björn Töpel <bjorn.topel@...el.com>
Cc:     kbuild test robot <lkp@...el.com>,
        Björn Töpel <bjorn.topel@...il.com>,
        ast@...nel.org, daniel@...earbox.net, davem@...emloft.net,
        hawk@...nel.org, john.fastabend@...il.com, netdev@...r.kernel.org,
        bpf@...r.kernel.org, magnus.karlsson@...el.com,
        jonathan.lemon@...il.com, jeffrey.t.kirsher@...el.com,
        kbuild-all@...ts.01.org, maximmi@...lanox.com,
        maciej.fijalkowski@...el.com, intel-wired-lan@...ts.osuosl.org
Subject: Re: [PATCH bpf-next v3 07/15] i40e: separate kernel allocated rx_bi
 rings from AF_XDP rings

On Tue, 19 May 2020 18:20:09 +0200 Björn Töpel wrote:
> On 2020-05-19 17:18, kbuild test robot wrote:
> > Hi "Björn,
> > 
> > I love your patch! Perhaps something to improve:
> > 
> > [auto build test WARNING on bpf-next/master]
> > [also build test WARNING on jkirsher-next-queue/dev-queue next-20200518]
> > [cannot apply to bpf/master linus/master v5.7-rc6]
> > [if your patch is applied to the wrong git tree, please drop us a note to help
> > improve the system. BTW, we also suggest to use '--base' option to specify the
> > base tree in git format-patch, please see https://stackoverflow.com/a/37406982]
> > 
> > url:    https://github.com/0day-ci/linux/commits/Bj-rn-T-pel/Introduce-AF_XDP-buffer-allocation-API/20200519-203122
> > base:   https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master
> > config: riscv-allyesconfig (attached as .config)
> > compiler: riscv64-linux-gcc (GCC) 9.3.0
> > reproduce:
> >          wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> >          chmod +x ~/bin/make.cross
> >          # save the attached .config to linux build tree
> >          COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=riscv
> > 
> > If you fix the issue, kindly add following tag as appropriate
> > Reported-by: kbuild test robot <lkp@...el.com>
> > 
> > All warnings (new ones prefixed by >>, old ones prefixed by <<):
> >   
> >>> drivers/net/ethernet/intel/i40e/i40e_txrx.c:531:6: warning: no previous prototype for 'i40e_fd_handle_status' [-Wmissing-prototypes]  
> > 531 | void i40e_fd_handle_status(struct i40e_ring *rx_ring, u64 qword0_raw,
> > |      ^~~~~~~~~~~~~~~~~~~~~
> >  
> 
> Yes, this could indeed be made static. Hmm, I wonder why I didn't get
> that warning on my x86-64 build!? I'll spin a v4 (or do a follow-up?).
> 
> 
> Björn

While at it I also get this on patch 11 (gcc-10, W=1):

drivers/net/ethernet/mellanox/mlx5/core/en_main.c: In function mlx5e_alloc_rq:
drivers/net/ethernet/mellanox/mlx5/core/en_main.c:376:6: warning: variable num_xsk_frames set but not used [-Wunused-but-set-variable]
   376 |  u32 num_xsk_frames = 0;
       |      ^~~~~~~~~~~~~~