Hi Miles, Thank you for the patch! Yet something to improve: [auto build test ERROR on net-next/master] [also build test ERROR on linus/master] [cannot apply to net/master hch-configfs/for-next sparc-next/master v5.8 next-20200811] [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/Miles-Chen/net-untag-pointer-in-... base: https://git.kernel.org/pub/scm/linux/kernel/git/davem/net-next.git bfdd5aaa54b0a44d9df550fe4c9db7e1470a11b8 config: x86_64-randconfig-a013-20200811 (attached as .config) compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project 4f2ad15db535873dda9bfe248a2771023b64a43c) 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 x86_64 cross compiling tool for clang build # apt-get install binutils-x86-64-linux-gnu # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross 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 >>): In file included from net/ipv6/af_inet6.c:29: In file included from include/linux/net.h:24: >> include/linux/sockptr.h:23:24: error: implicit declaration of function 'untagged_addr' [-Werror,-Wimplicit-function-declaration] return (unsigned long)untagged_addr(sockptr.kernel) >= TASK_SIZE; ^ 1 error generated. -- In file included from net/ipv6/udp.c:24: In file included from include/linux/net.h:24: >> include/linux/sockptr.h:23:24: error: implicit declaration of function 'untagged_addr' [-Werror,-Wimplicit-function-declaration] return (unsigned long)untagged_addr(sockptr.kernel) >= TASK_SIZE; ^ net/ipv6/udp.c:1029:30: warning: no previous prototype for function 'udp_v6_early_demux' [-Wmissing-prototypes] INDIRECT_CALLABLE_SCOPE void udp_v6_early_demux(struct sk_buff *skb) ^ net/ipv6/udp.c:1029:25: note: declare 'static' if the function is not intended to be used outside of this translation unit INDIRECT_CALLABLE_SCOPE void udp_v6_early_demux(struct sk_buff *skb) ^ static net/ipv6/udp.c:1070:29: warning: no previous prototype for function 'udpv6_rcv' [-Wmissing-prototypes] INDIRECT_CALLABLE_SCOPE int udpv6_rcv(struct sk_buff *skb) ^ net/ipv6/udp.c:1070:25: note: declare 'static' if the function is not intended to be used outside of this translation unit INDIRECT_CALLABLE_SCOPE int udpv6_rcv(struct sk_buff *skb) ^ static 2 warnings and 1 error generated. vim +/untagged_addr +23 include/linux/sockptr.h 20 21 static inline bool sockptr_is_kernel(sockptr_t sockptr) 22 { > 23 return (unsigned long)untagged_addr(sockptr.kernel) >= TASK_SIZE; 24 } 25 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org