Hi Jonathan, [FYI, it's a private test report for your RFC patch.] [auto build test ERROR on net/master] [also build test ERROR on linus/master v5.8-rc1 next-20200618] [cannot apply to char-misc/char-misc-testing net-next/master] [If your patch is applied to the wrong git tree, kindly drop us a note. And when submitting patch, we suggest to use as documented in https://git-scm.com/docs/git-format-patch] url: https://github.com/0day-ci/linux/commits/Jonathan-Lemon/netgpu-networking... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net.git ef7232da6bcd4294cbb2d424bc35885721570f01 config: x86_64-kexec (attached as .config) compiler: gcc-9 (Debian 9.3.0-13) 9.3.0 reproduce (this is a W=1 build): # save the attached .config to linux build tree make W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): ld: lib/iov_iter.o: in function `__netgpu_get_pages': include/net/netgpu.h:64: undefined reference to `fn_netgpu_get_pages' ld: include/net/netgpu.h:64: undefined reference to `fn_netgpu_get_pages' ld: net/core/skbuff.o: in function `__netgpu_put_page': vim +57 include/net/netgpu.h 60654acea6f2baf Jonathan Lemon 2020-06-18 53 60654acea6f2baf Jonathan Lemon 2020-06-18 54 static inline void 60654acea6f2baf Jonathan Lemon 2020-06-18 55 __netgpu_put_page(struct netgpu_ctx *ctx, struct page *page, bool napi) 60654acea6f2baf Jonathan Lemon 2020-06-18 56 { 60654acea6f2baf Jonathan Lemon 2020-06-18 @57 return fn_netgpu_put_page(ctx, page, napi); 60654acea6f2baf Jonathan Lemon 2020-06-18 58 } 60654acea6f2baf Jonathan Lemon 2020-06-18 59 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org