tree: https://git.kernel.org/pub/scm/linux/kernel/git/mkl/linux-can-next.git j1939 head: 615497ae46c3916c814348718657458523481622 commit: 0d07d158907c09ebaf8e75b2125d2a83b8bd4837 [108/109] j1939: add MSG_ERRQUEUE support reproduce: # apt-get install sparse git checkout 0d07d158907c09ebaf8e75b2125d2a83b8bd4837 make ARCH=x86_64 allmodconfig make C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' If you fix the issue, kindly add following tag Reported-by: kbuild test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> net/can/j1939/socket.c:741:16: sparse: sparse: symbol 'j1939_sk_get_timestamping_opt_stats' was not declared. Should it be static? Please review and possibly fold the followup patch. --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation