Hi Liao, kernel test robot noticed the following build errors:
[auto build test ERROR on kees/for-next/hardening] [also build test ERROR on kees/for-next/kspp kees/for-next/pstore linus/master v6.16 next-20250806] [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/Liao-Yuanhong/gcc-plugins-Use-swap-to-simplify-code/20250806-204609 base: https://git.kernel.org/pub/scm/linux/kernel/git/kees/linux.git for-next/hardening patch link: https://lore.kernel.org/r/20250806124341.382446-1-liaoyuanhong%40vivo.com patch subject: [PATCH] gcc-plugins: Use swap() to simplify code config: i386-randconfig-012-20250807 (https://download.01.org/0day-ci/archive/20250807/202508071233.bf6eggd2-...@intel.com/config) compiler: gcc-12 (Debian 12.2.0-14+deb12u1) 12.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250807/202508071233.bf6eggd2-...@intel.com/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 <l...@intel.com> | Closes: https://lore.kernel.org/oe-kbuild-all/202508071233.bf6eggd2-...@intel.com/ All errors (new ones prefixed by >>): scripts/gcc-plugins/randomize_layout_plugin.c: In function 'void performance_shuffle(tree_node**, long unsigned int, ranctx*)': >> scripts/gcc-plugins/randomize_layout_plugin.c:203:17: error: 'swap' was not >> declared in this scope 203 | swap(size_group[randnum], size_group[i]); | ^~~~ scripts/gcc-plugins/randomize_layout_plugin.c:203:17: note: suggested alternatives: In file included from /usr/include/c++/12/utility:69, from /usr/lib/gcc/x86_64-linux-gnu/12/plugin/include/system.h:244, from /usr/lib/gcc/x86_64-linux-gnu/12/plugin/include/gcc-plugin.h:28, from scripts/gcc-plugins/gcc-common.h:6, from scripts/gcc-plugins/randomize_layout_plugin.c:19: /usr/include/c++/12/bits/stl_pair.h:715:5: note: 'std::swap' 715 | swap(pair<_T1, _T2>&, pair<_T1, _T2>&) = delete; | ^~~~ In file included from /usr/include/c++/12/bits/stl_pair.h:61: /usr/include/c++/12/bits/move.h:196:5: note: 'std::swap' 196 | swap(_Tp& __a, _Tp& __b) | ^~~~ /usr/include/c++/12/bits/move.h:196:5: note: 'std::swap' scripts/gcc-plugins/randomize_layout_plugin.c:216:25: error: 'swap' was not declared in this scope 216 | swap(newtree[randnum], newtree[i]); | ^~~~ scripts/gcc-plugins/randomize_layout_plugin.c:216:25: note: suggested alternatives: /usr/include/c++/12/bits/stl_pair.h:715:5: note: 'std::swap' 715 | swap(pair<_T1, _T2>&, pair<_T1, _T2>&) = delete; | ^~~~ /usr/include/c++/12/bits/move.h:196:5: note: 'std::swap' 196 | swap(_Tp& __a, _Tp& __b) | ^~~~ /usr/include/c++/12/bits/move.h:196:5: note: 'std::swap' scripts/gcc-plugins/randomize_layout_plugin.c: In function 'void full_shuffle(tree_node**, long unsigned int, ranctx*)': scripts/gcc-plugins/randomize_layout_plugin.c:227:17: error: 'swap' was not declared in this scope 227 | swap(newtree[randnum], newtree[i]); | ^~~~ scripts/gcc-plugins/randomize_layout_plugin.c:227:17: note: suggested alternatives: /usr/include/c++/12/bits/stl_pair.h:715:5: note: 'std::swap' 715 | swap(pair<_T1, _T2>&, pair<_T1, _T2>&) = delete; | ^~~~ /usr/include/c++/12/bits/move.h:196:5: note: 'std::swap' 196 | swap(_Tp& __a, _Tp& __b) | ^~~~ /usr/include/c++/12/bits/move.h:196:5: note: 'std::swap' make[4]: *** [scripts/gcc-plugins/Makefile:54: scripts/gcc-plugins/randomize_layout_plugin.so] Error 1 shuffle=2972943921 make[4]: Target 'scripts/gcc-plugins/' not remade because of errors. make[3]: *** [scripts/Makefile.build:554: scripts/gcc-plugins] Error 2 shuffle=2972943921 make[3]: Target 'scripts/' not remade because of errors. make[2]: *** [Makefile:1258: scripts] Error 2 shuffle=2972943921 make[2]: Target 'prepare' not remade because of errors. make[1]: *** [Makefile:248: __sub-make] Error 2 shuffle=2972943921 make[1]: Target 'prepare' not remade because of errors. make: *** [Makefile:248: __sub-make] Error 2 shuffle=2972943921 make: Target 'prepare' not remade because of errors. vim +/swap +203 scripts/gcc-plugins/randomize_layout_plugin.c 190 191 static void performance_shuffle(tree *newtree, unsigned long length, ranctx *prng_state) 192 { 193 unsigned long i, x, index; 194 struct partition_group size_group[length]; 195 unsigned long num_groups = 0; 196 unsigned long randnum; 197 198 partition_struct(newtree, length, (struct partition_group *)&size_group, &num_groups); 199 200 /* FIXME: this group shuffle is currently a no-op. */ 201 for (i = num_groups - 1; i > 0; i--) { 202 randnum = ranval(prng_state) % (i + 1); > 203 swap(size_group[randnum], size_group[i]); 204 } 205 206 for (x = 0; x < num_groups; x++) { 207 for (index = size_group[x].length - 1; index > 0; index--) { 208 i = size_group[x].start + index; 209 if (DECL_BIT_FIELD_TYPE(newtree[i])) 210 continue; 211 randnum = ranval(prng_state) % (index + 1); 212 randnum += size_group[x].start; 213 // we could handle this case differently if desired 214 if (DECL_BIT_FIELD_TYPE(newtree[randnum])) 215 continue; 216 swap(newtree[randnum], newtree[i]); 217 } 218 } 219 } 220 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki