Hi Paolo, [FYI, it's a private test report for your RFC patch.] [auto build test WARNING on net/master] [also build test WARNING on net-next/master ipvs/master linus/master v5.13 next-20210709] [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/Paolo-Abeni/veth-more-flexible-c... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git 2b452550a203d88112eaf0ba9fc4b750a000b496 config: x86_64-rhel-8.3-kselftests (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/6256f5f16e2e81592bafc2b33401c8659... git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Paolo-Abeni/veth-more-flexible-channels-number-configuration/20210709-174314 git checkout 6256f5f16e2e81592bafc2b33401c86591362c89 # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=x86_64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; sparse warnings: (new ones prefixed by >>) drivers/net/veth.c:264:37: sparse: sparse: incorrect type in argument 1 (different address spaces) @@ expected struct net_device const *dev @@ got struct net_device [noderef] __rcu *peer @@ drivers/net/veth.c:264:37: sparse: expected struct net_device const *dev drivers/net/veth.c:264:37: sparse: got struct net_device [noderef] __rcu *peer drivers/net/veth.c:261:51: sparse: sparse: dereference of noderef expression drivers/net/veth.c:265:56: sparse: sparse: dereference of noderef expression Please review and possibly fold the followup patch. --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org