tree: https://github.com/jimc/linux.git dd-drm-next head: 2eec9300d730ad634b967a853579f0b5dffecc01 commit: 8819a72010473e6a18e27cb4a464fb921b1afbc0 [14/20] dyndbg: add print-to-tracefs, selftest with it - RFC config: arm64-randconfig-r033-20211013 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 6c76d0101193aa4eb891a6954ff047eda2f9cf71) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://github.com/jimc/linux/commit/8819a72010473e6a18e27cb4a464fb921b1a... git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dd-drm-next git checkout 8819a72010473e6a18e27cb4a464fb921b1afbc0 # save the attached .config to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): pr_warn("tracer-fn already set for %s\n", mod->name); ~~~^ include/linux/printk.h:499:37: note: expanded from macro 'pr_warn' printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/printk.h:446:60: note: expanded from macro 'printk' #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/printk.h:418:19: note: expanded from macro 'printk_index_wrap' _p_func(_fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ include/linux/printk.h:339:8: note: forward declaration of 'struct module' struct module; ^ lib/dynamic_debug.c:1331:51: error: incomplete definition of type 'struct module' pr_warn("delete: cant find tracer for %s\n", mod->name); ~~~^ include/linux/printk.h:499:37: note: expanded from macro 'pr_warn' printk(KERN_WARNING pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/printk.h:446:60: note: expanded from macro 'printk' #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/printk.h:418:19: note: expanded from macro 'printk_index_wrap' _p_func(_fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ include/linux/printk.h:339:8: note: forward declaration of 'struct module' struct module; ^ lib/dynamic_debug.c:1335:41: error: incomplete definition of type 'struct module' vpr_info("deleted tracer for %s\n", mod->name); ~~~^ lib/dynamic_debug.c:135:48: note: expanded from macro 'vpr_info' #define vpr_info(fmt, ...) vnpr_info(1, fmt, ##__VA_ARGS__) ^~~~~~~~~~~ lib/dynamic_debug.c:132:18: note: expanded from macro 'vnpr_info' pr_info(fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ include/linux/printk.h:519:34: note: expanded from macro 'pr_info' printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/printk.h:446:60: note: expanded from macro 'printk' #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/printk.h:418:19: note: expanded from macro 'printk_index_wrap' _p_func(_fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ include/linux/printk.h:339:8: note: forward declaration of 'struct module' struct module; ^ lib/dynamic_debug.c:1355:10: error: incomplete definition of type 'struct module' if (mod->name == dt->mod_name) { ~~~^ include/linux/printk.h:339:8: note: forward declaration of 'struct module' struct module; ^ lib/dynamic_debug.c:1359:18: error: incomplete definition of type 'struct module' if (!strcmp(mod->name, dt->mod_name)) { ~~~^ include/linux/printk.h:339:8: note: forward declaration of 'struct module' struct module; ^ lib/dynamic_debug.c:1378:35: error: incomplete definition of type 'struct module' vpr_info("%s %s\n", __func__, mod->name); ~~~^ lib/dynamic_debug.c:135:48: note: expanded from macro 'vpr_info' #define vpr_info(fmt, ...) vnpr_info(1, fmt, ##__VA_ARGS__) ^~~~~~~~~~~ lib/dynamic_debug.c:132:18: note: expanded from macro 'vnpr_info' pr_info(fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ include/linux/printk.h:519:34: note: expanded from macro 'pr_info' printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/printk.h:446:60: note: expanded from macro 'printk' #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/printk.h:418:19: note: expanded from macro 'printk_index_wrap' _p_func(_fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ include/linux/printk.h:339:8: note: forward declaration of 'struct module' struct module; ^ lib/dynamic_debug.c:1395:35: error: incomplete definition of type 'struct module' vpr_info("%s %s\n", __func__, mod->name); ~~~^ lib/dynamic_debug.c:135:48: note: expanded from macro 'vpr_info' #define vpr_info(fmt, ...) vnpr_info(1, fmt, ##__VA_ARGS__) ^~~~~~~~~~~ lib/dynamic_debug.c:132:18: note: expanded from macro 'vnpr_info' pr_info(fmt, ##__VA_ARGS__); \ ^~~~~~~~~~~ include/linux/printk.h:519:34: note: expanded from macro 'pr_info' printk(KERN_INFO pr_fmt(fmt), ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/printk.h:446:60: note: expanded from macro 'printk' #define printk(fmt, ...) printk_index_wrap(_printk, fmt, ##__VA_ARGS__) ^~~~~~~~~~~ include/linux/printk.h:418:19: note: expanded from macro 'printk_index_wrap' _p_func(_fmt, ##__VA_ARGS__); \ vim +1308 lib/dynamic_debug.c 1295 1296 /* 1297 * key computation is done on insert, such that lookup is trivial. 1298 * We use the modname ref in the 1st ddebug descriptor, the others in 1299 * the table are identical, giving us the module-scope lookup we want. 1300 */ 1301 static int ddebug_tracer_add(void (*tracer)(const char *lbl, struct va_format *vaf), 1302 struct module *mod, struct ddebug_table *dt) 1303 { 1304 struct ddebug_tracer *trc; 1305 1306 trc = ddebug_tracer_find(dt->ddebugs[0].modname); 1307 if (trc) { 1309 return -1; 1310 } 1311 trc = kmalloc(sizeof(*trc), GFP_ATOMIC); 1312 if (!trc) 1313 return -ENOMEM; 1314 1315 trc->tracefn = tracer; 1316 trc->key = (u64)dt->ddebugs[0].modname; 1317 hash_add(ddebug_tracer_by_module, &trc->hnode, (u64)dt->ddebugs[0].modname); 1318 1319 vpr_info("added tracer-fn for module %s\n", dt->ddebugs[0].modname); 1320 1321 return 0; 1322 } 1323 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org