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X-CSE-ConnectionGUID: e4WGr6AhQ8+Eg1s+Z0ajIA== X-CSE-MsgGUID: QUdRlWrrSReURmApEqyoMw== X-IronPort-AV: E=McAfee;i="6800,10657,11694"; a="97147101" X-IronPort-AV: E=Sophos;i="6.21,280,1763452800"; d="scan'208";a="97147101" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Feb 2026 04:25:08 -0800 X-CSE-ConnectionGUID: MXcdS3X2RnqXagpeYMVKcg== X-CSE-MsgGUID: Z4yAAamLRkOrP14lWiFygA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,280,1763452800"; d="scan'208";a="241592774" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by fmviesa001.fm.intel.com with ESMTP; 08 Feb 2026 04:25:05 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vp3qZ-00000000mBQ-05gV; Sun, 08 Feb 2026 12:25:03 +0000 Date: Sun, 8 Feb 2026 20:24:58 +0800 From: kernel test robot To: Steven Rostedt , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Linux Memory Management List Subject: Re: [PATCH v2 2/3] tracing: Add tracer_uses_snapshot() helper to remove #ifdefs Message-ID: <202602082013.PnPZCdsA-lkp@intel.com> References: <20260208040221.900653834@kernel.org> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260208040221.900653834@kernel.org> X-Rspamd-Server: rspam01 X-Rspamd-Queue-Id: 683D140003 X-Stat-Signature: 3wqsnqu9h1k5ra1azg9hf67ibyj3wgg6 X-Rspam-User: X-HE-Tag: 1770553509-302423 X-HE-Meta: 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 pFvFvhlS phzltNwTwUbFmKhYXXG/xg0ImAopqnUqS4INNBpNduxvMCy1qYIcuMWx5+GHZdDQtPbvXJDhO4oUsjuzvtGjmjDlnk7TeuThfqbkQ7xKbXqdQaxsnJBmWiYS6uTHsBYWDAROcA9ZTfbHmoKQC0qUNL896uwqeqv73WFmwFPELKiz76Jt5GJpj+DehA7CYXl/12SDozIJieQ7BNkmdt/89LiT2uCy/epuTdfXAfuDHcCjYg+XmzNTDiLZ0Xg26JejdaQPmuFUfooEaSLtOm9qVq6D07NS99mhPMFge8tA7EFN495wcLFFhMg2VrBxXqHD6yUFedhPXsI2TLsgNx7l9FFCob2txVs0Rfp0iuc8FVgNPFobNwAs+hFA346vneseLHMO/Ko28OKEJlqmMLcUo5sJowA== X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: List-Subscribe: List-Unsubscribe: Hi Steven, kernel test robot noticed the following build errors: [auto build test ERROR on trace/for-next] [also build test ERROR on linus/master v6.19-rc8 next-20260205] [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/Steven-Rostedt/tracing-Rename-trace_array-field-max_buffer-to-snapshot_buffer/20260208-120355 base: https://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace for-next patch link: https://lore.kernel.org/r/20260208040221.900653834%40kernel.org patch subject: [PATCH v2 2/3] tracing: Add tracer_uses_snapshot() helper to remove #ifdefs config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260208/202602082013.PnPZCdsA-lkp@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260208/202602082013.PnPZCdsA-lkp@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 | Closes: https://lore.kernel.org/oe-kbuild-all/202602082013.PnPZCdsA-lkp@intel.com/ All errors (new ones prefixed by >>): >> kernel/trace/trace.c:6337:13: error: no member named 'cond_snapshot' in 'struct trace_array' 6337 | ret = tr->cond_snapshot ? -EBUSY : 0; | ~~ ^ kernel/trace/trace.c:6366:2: error: use of undeclared identifier 'had_max_tr' 6366 | had_max_tr = tracer_uses_snapshot(tr->current_trace); | ^ kernel/trace/trace.c:6372:6: error: use of undeclared identifier 'had_max_tr' 6372 | if (had_max_tr && !tracer_uses_snapshot(trace)) { | ^ kernel/trace/trace.c:6385:7: error: use of undeclared identifier 'had_max_tr' 6385 | if (!had_max_tr && tracer_uses_snapshot(trace)) { | ^ kernel/trace/trace.c:9795:23: warning: shift count is negative [-Wshift-count-negative] 9795 | !((1ULL << i) & TOP_LEVEL_TRACE_FLAGS)) { | ^~~~~~~~~~~~~~~~~~~~~ kernel/trace/trace.c:523:9: note: expanded from macro 'TOP_LEVEL_TRACE_FLAGS' 523 | TRACE_ITER(PROF_TEXT_OFFSET) | FPROFILE_DEFAULT_FLAGS) | ^~~~~~~~~~~~~~~~~~~~~~~~~~~~ kernel/trace/trace.h:1452:42: note: expanded from macro 'TRACE_ITER' 1452 | (TRACE_ITER_##flag##_BIT < 0 ? 0 : 1ULL << (TRACE_ITER_##flag##_BIT)) | ^ ~~~~~~~~~~~~~~~~~~~~~~~~~ 1 warning and 4 errors generated. vim +6337 kernel/trace/trace.c ef9188bcc6ca1d Mark-PK Tsai 2022-04-26 6300 9c5b9d3d65e485 Masami Hiramatsu 2020-01-11 6301 int tracing_set_tracer(struct trace_array *tr, const char *buf) 09d23a1d8a82e8 Steven Rostedt (Red Hat 2015-02-03 6302) { 428add559b6923 Steven Rostedt 2025-11-11 6303 struct tracer *trace = NULL; 428add559b6923 Steven Rostedt 2025-11-11 6304 struct tracers *t; 12883efb670c28 Steven Rostedt (Red Hat 2013-03-05 6305) #ifdef CONFIG_TRACER_MAX_TRACE 34600f0e9c33c9 Steven Rostedt 2013-01-22 6306 bool had_max_tr; 12883efb670c28 Steven Rostedt (Red Hat 2013-03-05 6307) #endif d33b10c0c73adc Steven Rostedt 2024-12-24 6308 int ret; bc0c38d139ec7f Steven Rostedt 2008-05-12 6309 d33b10c0c73adc Steven Rostedt 2024-12-24 6310 guard(mutex)(&trace_types_lock); 1027fcb206a0fb Steven Rostedt 2009-03-12 6311 7a1d1e4b9639ff Steven Rostedt (Google 2024-06-12 6312) update_last_data(tr); 7a1d1e4b9639ff Steven Rostedt (Google 2024-06-12 6313) a1f157c7a3bb34 Zheng Yejian 2023-09-06 6314 if (!tr->ring_buffer_expanded) { 2b6080f28c7cc3 Steven Rostedt 2012-05-11 6315 ret = __tracing_resize_ring_buffer(tr, trace_buf_size, 438ced1720b584 Vaibhav Nagarnaik 2012-02-02 6316 RING_BUFFER_ALL_CPUS); 73c5162aa362a5 Steven Rostedt 2009-03-11 6317 if (ret < 0) d33b10c0c73adc Steven Rostedt 2024-12-24 6318 return ret; 73c5162aa362a5 Steven Rostedt 2009-03-11 6319 ret = 0; 73c5162aa362a5 Steven Rostedt 2009-03-11 6320 } 73c5162aa362a5 Steven Rostedt 2009-03-11 6321 428add559b6923 Steven Rostedt 2025-11-11 6322 list_for_each_entry(t, &tr->tracers, list) { 428add559b6923 Steven Rostedt 2025-11-11 6323 if (strcmp(t->tracer->name, buf) == 0) { 428add559b6923 Steven Rostedt 2025-11-11 6324 trace = t->tracer; bc0c38d139ec7f Steven Rostedt 2008-05-12 6325 break; bc0c38d139ec7f Steven Rostedt 2008-05-12 6326 } 428add559b6923 Steven Rostedt 2025-11-11 6327 } 428add559b6923 Steven Rostedt 2025-11-11 6328 if (!trace) d33b10c0c73adc Steven Rostedt 2024-12-24 6329 return -EINVAL; d33b10c0c73adc Steven Rostedt 2024-12-24 6330 428add559b6923 Steven Rostedt 2025-11-11 6331 if (trace == tr->current_trace) d33b10c0c73adc Steven Rostedt 2024-12-24 6332 return 0; bc0c38d139ec7f Steven Rostedt 2008-05-12 6333 b1e5d74d04bbcf Steven Rostedt 2026-02-07 6334 if (tracer_uses_snapshot(trace)) { c0a581d7126c0b Waiman Long 2022-09-22 6335 local_irq_disable(); a35873a0993b4d Tom Zanussi 2019-02-13 6336 arch_spin_lock(&tr->max_lock); 22bec11a569983 Steven Rostedt 2025-01-06 @6337 ret = tr->cond_snapshot ? -EBUSY : 0; a35873a0993b4d Tom Zanussi 2019-02-13 6338 arch_spin_unlock(&tr->max_lock); c0a581d7126c0b Waiman Long 2022-09-22 6339 local_irq_enable(); a35873a0993b4d Tom Zanussi 2019-02-13 6340 if (ret) d33b10c0c73adc Steven Rostedt 2024-12-24 6341 return ret; a35873a0993b4d Tom Zanussi 2019-02-13 6342 } b1e5d74d04bbcf Steven Rostedt 2026-02-07 6343 c7b3ae0bd2ca65 Ziqian SUN (Zamir 2017-09-11 6344) /* Some tracers won't work on kernel command line */ 428add559b6923 Steven Rostedt 2025-11-11 6345 if (system_state < SYSTEM_RUNNING && trace->noboot) { c7b3ae0bd2ca65 Ziqian SUN (Zamir 2017-09-11 6346) pr_warn("Tracer '%s' is not allowed on command line, ignored\n", 428add559b6923 Steven Rostedt 2025-11-11 6347 trace->name); d1e27ee9c6f21c Steven Rostedt 2024-12-19 6348 return -EINVAL; c7b3ae0bd2ca65 Ziqian SUN (Zamir 2017-09-11 6349) } c7b3ae0bd2ca65 Ziqian SUN (Zamir 2017-09-11 6350) 607e2ea167e56d Steven Rostedt (Red Hat 2013-11-06 6351) /* Some tracers are only allowed for the top level buffer */ 428add559b6923 Steven Rostedt 2025-11-11 6352 if (!trace_ok_for_array(trace, tr)) d33b10c0c73adc Steven Rostedt 2024-12-24 6353 return -EINVAL; 607e2ea167e56d Steven Rostedt (Red Hat 2013-11-06 6354) cf6ab6d9143b15 Steven Rostedt (Red Hat 2014-12-15 6355) /* If trace pipe files are being read, we can't change the tracer */ d33b10c0c73adc Steven Rostedt 2024-12-24 6356 if (tr->trace_ref) d33b10c0c73adc Steven Rostedt 2024-12-24 6357 return -EBUSY; cf6ab6d9143b15 Steven Rostedt (Red Hat 2014-12-15 6358) 9f029e83e968e5 Steven Rostedt 2008-11-12 6359 trace_branch_disable(); 613f04a0f51e6e Steven Rostedt (Red Hat 2013-03-14 6360) 50512ab576e1ce Steven Rostedt (Red Hat 2014-01-14 6361) tr->current_trace->enabled--; 613f04a0f51e6e Steven Rostedt (Red Hat 2013-03-14 6362) 2b6080f28c7cc3 Steven Rostedt 2012-05-11 6363 if (tr->current_trace->reset) 2b6080f28c7cc3 Steven Rostedt 2012-05-11 6364 tr->current_trace->reset(tr); 613f04a0f51e6e Steven Rostedt (Red Hat 2013-03-14 6365) b1e5d74d04bbcf Steven Rostedt 2026-02-07 6366 had_max_tr = tracer_uses_snapshot(tr->current_trace); a541a9559bb0a8 Steven Rostedt (Google 2022-10-05 6367) 7440172974e85b Paul E. McKenney 2018-11-06 6368 /* Current trace needs to be nop_trace before synchronize_rcu */ 2b6080f28c7cc3 Steven Rostedt 2012-05-11 6369 tr->current_trace = &nop_trace; 428add559b6923 Steven Rostedt 2025-11-11 6370 tr->current_trace_flags = nop_trace.flags; 34600f0e9c33c9 Steven Rostedt 2013-01-22 6371 b1e5d74d04bbcf Steven Rostedt 2026-02-07 6372 if (had_max_tr && !tracer_uses_snapshot(trace)) { 34600f0e9c33c9 Steven Rostedt 2013-01-22 6373 /* 34600f0e9c33c9 Steven Rostedt 2013-01-22 6374 * We need to make sure that the update_max_tr sees that 34600f0e9c33c9 Steven Rostedt 2013-01-22 6375 * current_trace changed to nop_trace to keep it from 34600f0e9c33c9 Steven Rostedt 2013-01-22 6376 * swapping the buffers after we resize it. 34600f0e9c33c9 Steven Rostedt 2013-01-22 6377 * The update_max_tr is called from interrupts disabled 34600f0e9c33c9 Steven Rostedt 2013-01-22 6378 * so a synchronized_sched() is sufficient. 34600f0e9c33c9 Steven Rostedt 2013-01-22 6379 */ 7440172974e85b Paul E. McKenney 2018-11-06 6380 synchronize_rcu(); 3209cff4490bee Steven Rostedt (Red Hat 2013-03-12 6381) free_snapshot(tr); 180e4e390978af Vincent Donnefort 2024-02-20 6382 tracing_disarm_snapshot(tr); ef710e100c1068 KOSAKI Motohiro 2010-07-01 6383 } 12883efb670c28 Steven Rostedt (Red Hat 2013-03-05 6384) b1e5d74d04bbcf Steven Rostedt 2026-02-07 6385 if (!had_max_tr && tracer_uses_snapshot(trace)) { 180e4e390978af Vincent Donnefort 2024-02-20 6386 ret = tracing_arm_snapshot_locked(tr); 180e4e390978af Vincent Donnefort 2024-02-20 6387 if (ret) d33b10c0c73adc Steven Rostedt 2024-12-24 6388 return ret; ef710e100c1068 KOSAKI Motohiro 2010-07-01 6389 } 577b785f55168d Steven Rostedt 2009-02-26 6390 428add559b6923 Steven Rostedt 2025-11-11 6391 tr->current_trace_flags = t->flags ? : t->tracer->flags; 428add559b6923 Steven Rostedt 2025-11-11 6392 428add559b6923 Steven Rostedt 2025-11-11 6393 if (trace->init) { 428add559b6923 Steven Rostedt 2025-11-11 6394 ret = tracer_init(trace, tr); 180e4e390978af Vincent Donnefort 2024-02-20 6395 if (ret) { b1e5d74d04bbcf Steven Rostedt 2026-02-07 6396 if (tracer_uses_snapshot(trace)) 180e4e390978af Vincent Donnefort 2024-02-20 6397 tracing_disarm_snapshot(tr); 428add559b6923 Steven Rostedt 2025-11-11 6398 tr->current_trace_flags = nop_trace.flags; d33b10c0c73adc Steven Rostedt 2024-12-24 6399 return ret; 1c80025a49855b Frederic Weisbecker 2008-11-16 6400 } 180e4e390978af Vincent Donnefort 2024-02-20 6401 } bc0c38d139ec7f Steven Rostedt 2008-05-12 6402 428add559b6923 Steven Rostedt 2025-11-11 6403 tr->current_trace = trace; 50512ab576e1ce Steven Rostedt (Red Hat 2014-01-14 6404) tr->current_trace->enabled++; 9f029e83e968e5 Steven Rostedt 2008-11-12 6405 trace_branch_enable(tr); bc0c38d139ec7f Steven Rostedt 2008-05-12 6406 d33b10c0c73adc Steven Rostedt 2024-12-24 6407 return 0; d9e540762f5cdd Peter Zijlstra 2008-11-01 6408 } d9e540762f5cdd Peter Zijlstra 2008-11-01 6409 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki