Hi Rong, kernel test robot noticed the following build errors:
[auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Rong-Tao/selftests-bpf-Test-bpf_strcat-bpf_strncat-kfuncs/20260807-065842 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/tencent_DB0510330C3A8574B3C62E6154165FCB4709%40qq.com patch subject: [PATCH bpf-next v2 2/2] selftests/bpf: Test bpf_strcat,bpf_strncat kfuncs config: riscv-randconfig-r131-20260807 (https://download.01.org/0day-ci/archive/20260808/[email protected]/config) compiler: riscv64-linux-gcc (GCC) 8.5.0 sparse: v0.6.5-rc1 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260808/[email protected]/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 <[email protected]> | Closes: https://lore.kernel.org/oe-kbuild-all/[email protected]/ All errors (new ones prefixed by >>): In file included from include/uapi/linux/filter.h:9, from include/linux/bpf.h:8, from kernel/bpf/helpers.c:4: kernel/bpf/helpers.c: In function '__bpf_strncat': >> include/linux/compiler_types.h:702:38: error: call to >> '__compiletime_assert_851' declared with attribute error: min(slen, sz) >> signedness error _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^ include/linux/compiler.h:68:3: note: in definition of macro '__trace_if_value' (cond) ? \ ^~~~ include/linux/compiler.h:55:28: note: in expansion of macro '__trace_if_var' #define if(cond, ...) if ( __trace_if_var( !!(cond , ## __VA_ARGS__) ) ) ^~~~~~~~~~~~~~ kernel/bpf/helpers.c:4219:2: note: in expansion of macro 'if' if (space <= 1 || space < min(slen, sz) + 1) ^~ include/linux/compiler_types.h:690:2: note: in expansion of macro '__compiletime_assert' __compiletime_assert(condition, msg, prefix, suffix) ^~~~~~~~~~~~~~~~~~~~ include/linux/compiler_types.h:702:2: note: in expansion of macro '_compiletime_assert' _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) ^~~~~~~~~~~~~~~~~~~ include/linux/build_bug.h:40:37: note: in expansion of macro 'compiletime_assert' #define BUILD_BUG_ON_MSG(cond, msg) compiletime_assert(!(cond), msg) ^~~~~~~~~~~~~~~~~~ include/linux/minmax.h:93:2: note: in expansion of macro 'BUILD_BUG_ON_MSG' BUILD_BUG_ON_MSG(!__types_ok(ux, uy), \ ^~~~~~~~~~~~~~~~ include/linux/minmax.h:98:2: note: in expansion of macro '__careful_cmp_once' __careful_cmp_once(op, x, y, __UNIQUE_ID(x_), __UNIQUE_ID(y_)) ^~~~~~~~~~~~~~~~~~ include/linux/minmax.h:105:19: note: in expansion of macro '__careful_cmp' #define min(x, y) __careful_cmp(min, x, y) ^~~~~~~~~~~~~ kernel/bpf/helpers.c:4219:28: note: in expansion of macro 'min' if (space <= 1 || space < min(slen, sz) + 1) ^~~ vim +/__compiletime_assert_851 +702 include/linux/compiler_types.h eb5c2d4b45e3d2 Will Deacon 2020-07-21 688 eb5c2d4b45e3d2 Will Deacon 2020-07-21 689 #define _compiletime_assert(condition, msg, prefix, suffix) \ eb5c2d4b45e3d2 Will Deacon 2020-07-21 690 __compiletime_assert(condition, msg, prefix, suffix) eb5c2d4b45e3d2 Will Deacon 2020-07-21 691 eb5c2d4b45e3d2 Will Deacon 2020-07-21 692 /** eb5c2d4b45e3d2 Will Deacon 2020-07-21 693 * compiletime_assert - break build and emit msg if condition is false eb5c2d4b45e3d2 Will Deacon 2020-07-21 694 * @condition: a compile-time constant condition to check eb5c2d4b45e3d2 Will Deacon 2020-07-21 695 * @msg: a message to emit if condition is false eb5c2d4b45e3d2 Will Deacon 2020-07-21 696 * eb5c2d4b45e3d2 Will Deacon 2020-07-21 697 * In tradition of POSIX assert, this macro will break the build if the eb5c2d4b45e3d2 Will Deacon 2020-07-21 698 * supplied condition is *false*, emitting the supplied error message if the eb5c2d4b45e3d2 Will Deacon 2020-07-21 699 * compiler has support to do so. eb5c2d4b45e3d2 Will Deacon 2020-07-21 700 */ eb5c2d4b45e3d2 Will Deacon 2020-07-21 701 #define compiletime_assert(condition, msg) \ eb5c2d4b45e3d2 Will Deacon 2020-07-21 @702 _compiletime_assert(condition, msg, __compiletime_assert_, __COUNTER__) eb5c2d4b45e3d2 Will Deacon 2020-07-21 703 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki
