tree: https://github.com/jimc/linux.git dd-merge head: 751c4af184aac85e647bfad89defad95f86dcd24 commit: 3c23cffcf721b5bf124ad1c3178170d8e0a30cb4 [20/37] dyndbg: validate ddebug_site_get invariants config: i386-randconfig-r004-20210617 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce (this is a W=1 build): # https://github.com/jimc/linux/commit/3c23cffcf721b5bf124ad1c3178170d8e0a3... git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dd-merge git checkout 3c23cffcf721b5bf124ad1c3178170d8e0a30cb4 # save the attached .config to linux build tree make W=1 ARCH=i386 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; Note: the jimc/dd-merge HEAD 751c4af184aac85e647bfad89defad95f86dcd24 builds fine. It only hurts bisectibility. All errors (new ones prefixed by >>): lib/dynamic_debug.c: In function 'ddebug_site_get': 155 | if (dp >= __start___dyndbg && dp < __stop___dyndbg) { | ^~~~~~~~~~~~~~~~ | __start___dyndbgs lib/dynamic_debug.c:155:12: note: each undeclared identifier is reported only once for each function it appears in 155 | if (dp >= __start___dyndbg && dp < __stop___dyndbg) { | ^~~~~~~~~~~~~~~ | __stop___dyndbgs vim +155 lib/dynamic_debug.c 148 149 static struct _ddebug_site *ddebug_site_get(struct _ddebug *dp) 150 { 151 struct _ddebug *dh = dp - (dp->_index); 152 153 WARN_ON(!is_dyndbg_header_pair(dh, dh->site)); 154 156 157 v5pr_info("get: %s is builtin: %d %d %s:%s:%d\n", 158 dp->site->modname, dp->_index, (int)(dp - dh), 159 dh->site[dp->_index].filename, 160 dh->site[dp->_index].function, dp->lineno); 161 162 WARN_ON(dp != &__start___dyndbg[dp->_index]); 163 164 WARN_ON(!(dp->_index == (dp - dh) && 165 dp->_index == (dp - __start___dyndbg) && 166 dp->_index == (&__start___dyndbg_sites[dp->_index] 167 - &__start___dyndbg_sites[0]))); 168 169 WARN_ON(&__start___dyndbg_sites[dp->_index] != dp->site); 170 } else { 171 v4pr_info("get: %s is loaded: %d %s:%s:%d\n", 172 dp->site->modname, dp->_index, 173 dh->site[dp->_index].filename, 174 dh->site[dp->_index].function, dp->lineno); 175 } 176 WARN_ON(&dh->site[dp->_index] != dp->site); 177 178 return dp->site; 179 } 180 static inline void ddebug_site_put(struct _ddebug *dp) 181 { 182 } 183 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org