Re: [PATCH net-next 5/7] sctp: add dif and sdif check in asoc and ep lookup

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On Mon, 2022-11-14 at 21:38 -0500, Xin Long wrote:
> On Sun, Nov 13, 2022 at 3:15 PM kernel test robot <lkp@xxxxxxxxx> wrote:
> > 
> > Hi Xin,
> > 
> > Thank you for the patch! Yet something to improve:
> > 
> > [auto build test ERROR on net-next/master]
> > 
> > url:    https://github.com/intel-lab-lkp/linux/commits/Xin-Long/sctp-support-vrf-processing/20221114-004540
> > patch link:    https://lore.kernel.org/r/86dfdc49613ca8a8a6a3d7c7cf2e7bd8207338f2.1668357542.git.lucien.xin%40gmail.com
> > patch subject: [PATCH net-next 5/7] sctp: add dif and sdif check in asoc and ep lookup
> > config: arm-randconfig-r034-20221114
> > compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 463da45892e2d2a262277b91b96f5f8c05dc25d0)
> > 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://github.com/intel-lab-lkp/linux/commit/6129dc2e382c6e2d3198f6c32cc1f750a15a77ab
> >         git remote add linux-review https://github.com/intel-lab-lkp/linux
> >         git fetch --no-tags linux-review Xin-Long/sctp-support-vrf-processing/20221114-004540
> >         git checkout 6129dc2e382c6e2d3198f6c32cc1f750a15a77ab
> >         # save the config file
> >         mkdir build_dir && cp config build_dir/.config
> >         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash net/openvswitch/
> > 
> > If you fix the issue, kindly add following tag where applicable
> > > Reported-by: kernel test robot <lkp@xxxxxxxxx>
> > 
> > All errors (new ones prefixed by >>):
> > 
> >    In file included from net/openvswitch/actions.c:26:
> >    In file included from include/net/sctp/checksum.h:27:
> > > > include/net/sctp/sctp.h:686:35: error: no member named 'sctp' in 'struct net'
> >            l3mdev_accept = !!READ_ONCE(net->sctp.l3mdev_accept);
> >                                        ~~~  ^
> The build disabled IP_SCTP, while net/sctp/sctp.h is included in other modules.
> Instead of "net/sctp/sctp.h", "linux/sctp.h" should be included, I
> will send another patch series to fix them.
> 
> We do NOT need to change anything in this series.

'net->sctp' is defined only when CONFIG_SCTP is enabled. AFAICS the new
helper introduced by this patch is the only function in sctp.h
accessing 'net->sctp', so prior to this patch including sctp.h with

# CONFIG_SCTP is not set

was apparently safe, while not it breaks the build.

I think the issue should be addressed here.

Thanks,

Paolo




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