Hi Petr, FYI, the error/warning still remains. tree: https://github.com/jpirko/linux_mlxsw petrm_wip head: 1ae7b8315f99699717ac512be7e6c4300539f44f commit: c92561acddb910e2e36c78d9ec7111d3d770fafb [31/32] qevent wip config: mips-loongson3_defconfig (attached as .config) compiler: mips64el-linux-gcc (GCC) 9.3.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross git checkout c92561acddb910e2e36c78d9ec7111d3d770fafb # save the attached .config to linux build tree COMPILER_INSTALL_PATH=$HOME/0day GCC_VERSION=9.3.0 make.cross ARCH=mips If you fix the issue, kindly add following tag as appropriate Reported-by: kbuild test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): In file included from include/linux/kernel.h:11, from security/selinux/nlmsgtab.c:10: security/selinux/nlmsgtab.c: In function 'selinux_nlmsg_lookup': 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^ include/linux/compiler.h:331:4: note: in definition of macro '__compiletime_assert' 331 | prefix ## suffix(); \ | ^~~~~~ include/linux/compiler.h:350:2: note: in expansion of macro '_compiletime_assert' 350 | _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) | ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:39:37: note: in expansion of macro 'compiletime_assert' 39 | #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) | ^~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:50:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' 50 | BUILD_BUG_ON_MSG(condition, "BUILD_BUG_ON failed: " #condition) | ^~~~~~~~~~~~~~~~ security/selinux/nlmsgtab.c:174:3: note: in expansion of macro 'BUILD_BUG_ON' 174 | BUILD_BUG_ON(RTM_MAX != (RTM_NEWVLAN + 3)); | ^~~~~~~~~~~~ vim +/__compiletime_assert_264 +350 include/linux/compiler.h 9a8ab1c39970a4 Daniel Santos 2013-02-21 336 9a8ab1c39970a4 Daniel Santos 2013-02-21 337 #define _compiletime_assert(condition, msg, prefix, suffix) \ 9a8ab1c39970a4 Daniel Santos 2013-02-21 338 __compiletime_assert(condition, msg, prefix, suffix) 9a8ab1c39970a4 Daniel Santos 2013-02-21 339 9a8ab1c39970a4 Daniel Santos 2013-02-21 340 /** 9a8ab1c39970a4 Daniel Santos 2013-02-21 341 * compiletime_assert - break build and emit msg if condition is false 9a8ab1c39970a4 Daniel Santos 2013-02-21 342 * @condition: a compile-time constant condition to check 9a8ab1c39970a4 Daniel Santos 2013-02-21 343 * @msg: a message to emit if condition is false 9a8ab1c39970a4 Daniel Santos 2013-02-21 344 * 9a8ab1c39970a4 Daniel Santos 2013-02-21 345 * In tradition of POSIX assert, this macro will break the build if the 9a8ab1c39970a4 Daniel Santos 2013-02-21 346 * supplied condition is *false*, emitting the supplied error message if the 9a8ab1c39970a4 Daniel Santos 2013-02-21 347 * compiler has support to do so. 9a8ab1c39970a4 Daniel Santos 2013-02-21 348 */ 9a8ab1c39970a4 Daniel Santos 2013-02-21 349 #define compiletime_assert(condition, msg) \ af9c5d2e3b3558 Vegard Nossum 2020-04-06 @350 _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) 9a8ab1c39970a4 Daniel Santos 2013-02-21 351 :::::: The code at line 350 was first introduced by commit :::::: af9c5d2e3b355854ff0e4acfbfbfadcd5198a349 compiler.h: fix error in BUILD_BUG_ON() reporting :::::: TO: Vegard Nossum <vegard.nossum(a)oracle.com&gt; :::::: CC: Linus Torvalds <torvalds(a)linux-foundation.org&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org