tree: https://github.com/jimc/linux.git dd-drm-next head: 713c9b94da96f63ca998790458e91ac311104609 commit: 8ddaf3cb5e140ad3788e5d6046a3da90780db690 [14/16] dyndbg: add print-to-tracefs, selftest with it - RFC config: arm64-randconfig-r024-20211016 (attached as .config) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project a49f5386ce6b091da66ea7c3a1d9a588d53becf7) 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/8ddaf3cb5e140ad3788e5d6046a3da90780d... git remote add jimc https://github.com/jimc/linux.git git fetch --no-tags jimc dd-drm-next git checkout 8ddaf3cb5e140ad3788e5d6046a3da90780db690 # 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 >>): WARN_ONCE("cannot enable T, CONFIG_TRACE=n\n"); ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/bug.h:150:29: note: expanded from macro 'WARN_ONCE' DO_ONCE_LITE_IF(condition, WARN, 1, format) ~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~~~~~~~~~~~~~~ include/linux/once_lite.h:19:4: note: expanded from macro 'DO_ONCE_LITE_IF' func(__VA_ARGS__); \ ^~~~~~~~~~~~~~~~~ include/asm-generic/bug.h:132:3: note: expanded from macro 'WARN' __WARN_printf(TAINT_WARN, format); \ ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ include/asm-generic/bug.h:99:20: note: expanded from macro '__WARN_printf' __warn_printk(arg); \ ~~~~~~~~~~~~~ ^ include/asm-generic/bug.h:95:28: note: '__warn_printk' declared here extern __printf(1, 2) void __warn_printk(const char *fmt, ...); ^ lib/dynamic_debug.c:716:3: error: expected ')' return __dynamic_emit_prefix(desc, buf); ^ lib/dynamic_debug.c:714:5: note: to match this '(' if (unlikely((dyndbg_site_is_enabled(desc)) && ^ lib/dynamic_debug.c:739:3: error: implicit declaration of function 'trace_array_printk' [-Werror,-Wimplicit-function-declaration] trace_array_printk(trace_arr, _THIS_IP_, "%s%pV", buf, &vaf); ^ lib/dynamic_debug.c:739:3: note: did you mean 'trace_printk'? include/linux/kernel.h:467:5: note: 'trace_printk' declared here int trace_printk(const char *fmt, ...) ^ lib/dynamic_debug.c:766:3: error: implicit declaration of function 'trace_array_printk' [-Werror,-Wimplicit-function-declaration] trace_array_printk(trace_arr, _THIS_IP_, "%s%pV", buf, &vaf); ^ 4 errors generated. vim +/fmt +440 lib/dynamic_debug.c 435 436 static int ddebug_validate_flags(struct flag_settings *modifiers) 437 { 438 #if !defined(CONFIG_TRACING) 439 if (dyndbg_site_is_tracing(modifiers)) { 441 return -EINVAL; 442 } 443 #endif 444 return 0; 445 } 446 /* 447 * Parse `str' as a flags specification, format [-+=][p]+. 448 * Sets up *maskp and *flagsp to be used when changing the 449 * flags fields of matched _ddebug's. Returns 0 on success 450 * or <0 on error. 451 */ 452 static int ddebug_parse_flags(const char *str, struct flag_settings *modifiers) 453 { 454 int op, i; 455 456 switch (*str) { 457 case '+': 458 case '-': 459 case '=': 460 op = *str++; 461 break; 462 default: 463 pr_err("bad flag-op %c, at start of %s\n", *str, str); 464 return -EINVAL; 465 } 466 v3pr_info("op=<%c>\n", op); 467 468 for (; *str ; ++str) { 469 for (i = ARRAY_SIZE(opt_array) - 1; i >= 0; i--) { 470 if (*str == opt_array[i].opt_char) { 471 modifiers->flags |= opt_array[i].flag; 472 break; 473 } 474 } 475 if (i < 0) { 476 pr_err("unknown flag '%c'\n", *str); 477 return -EINVAL; 478 } 479 } 480 v3pr_info("flags=0x%x\n", modifiers->flags); 481 482 /* calculate final flags, mask based upon op */ 483 switch (op) { 484 case '=': 485 /* modifiers->flags already set */ 486 modifiers->mask = 0; 487 break; 488 case '+': 489 modifiers->mask = ~0U; 490 break; 491 case '-': 492 modifiers->mask = ~modifiers->flags; 493 modifiers->flags = 0; 494 break; 495 } 496 v3pr_info("*flagsp=0x%x *maskp=0x%x\n", modifiers->flags, modifiers->mask); 497 498 return ddebug_validate_flags(modifiers); 499 } 500 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org