Hi Hu, kernel test robot noticed the following build errors: [auto build test ERROR on shuah-kselftest/next] [also build test ERROR on shuah-kselftest/fixes linus/master v6.7 next-20240112] [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#_base_tree_information] url: https://github.com/intel-lab-lkp/linux/commits/Hu-Yadi/selftests-landlock-Fix-two-build-issues/20240112-151805 base: https://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest.git next patch link: https://lore.kernel.org/r/20240112071245.669-1-hu.yadi%40h3c.com patch subject: [PATCH v3] selftests/landlock:Fix two build issues compiler: gcc-12 (Debian 12.2.0-14) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240115/202401151147.T1s11iHJ-lkp@xxxxxxxxx/reproduce) If you fix the issue in a separate patch/commit (i.e. not just a new version of the same patch/commit), kindly add following tags | Reported-by: kernel test robot <lkp@xxxxxxxxx> | Closes: https://lore.kernel.org/oe-kbuild-all/202401151147.T1s11iHJ-lkp@xxxxxxxxx/ All errors (new ones prefixed by >>): >> net_test.c:25:14: error: static declaration of 'gettid' follows non-static declaration 25 | static pid_t gettid(void) | ^~~~~~ In file included from /usr/include/unistd.h:1218, from /usr/include/x86_64-linux-gnu/bits/sigstksz.h:24, from /usr/include/signal.h:328, from /usr/include/x86_64-linux-gnu/sys/wait.h:36, from common.h:16, from net_test.c:22: /usr/include/x86_64-linux-gnu/bits/unistd_ext.h:34:16: note: previous declaration of 'gettid' with type '__pid_t(void)' {aka 'int(void)'} 34 | extern __pid_t gettid (void) __THROW; | ^~~~~~ -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki