From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.16]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.subspace.kernel.org (Postfix) with ESMTPS id EB8E533A9CB; Tue, 3 Feb 2026 12:13:11 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.16 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770120793; cv=none; b=iQJangRM5IBo9fGVsnSnhQg322/aW8xVkqp574JfQ9PrEyi2L2PVsnkZupwv0xwbT8cg08cxpZN5WYjTrRLFD2OelIdeiieNvHmKWsl5HqPoUC2wFLjWLK2a4PfDNOBeOsCFNhTOvhUvkYuXSjziB+2jSyjItvxclEsBV8zhPjQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1770120793; c=relaxed/simple; bh=EJ3LnE8q3TaYue/6JRSSE8ScZ+X65Vqv7A3J1Op26pU=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Gr2MzhQy82qAEppPDbjw3yVeeD1Clw/sYES0hlcl3v2yn7ERAPL5+FWPI0bWvpMGmLjIb5aqnldCpMD7lNim0w3w4Uj1sWMtNZJLsezDahpQaL2Ni0lJ1Q3mP7nImHSyf0W9lgKhRPWsYB6Ij3Hz4/Q49HH8O0fV548TtoDyFxY= ARC-Authentication-Results:i=1; smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com; spf=pass smtp.mailfrom=intel.com; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b=hbRIJimc; arc=none smtp.client-ip=192.198.163.16 Authentication-Results: smtp.subspace.kernel.org; dmarc=pass (p=none dis=none) header.from=intel.com Authentication-Results: smtp.subspace.kernel.org; spf=pass smtp.mailfrom=intel.com Authentication-Results: smtp.subspace.kernel.org; dkim=pass (2048-bit key) header.d=intel.com header.i=@intel.com header.b="hbRIJimc" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1770120792; x=1801656792; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=EJ3LnE8q3TaYue/6JRSSE8ScZ+X65Vqv7A3J1Op26pU=; b=hbRIJimcQ3ZBWA59OdbggXsaAb370HFA/MDeLxfTkVPFpXbx0TcPyuWW T9Uqa3UsvChP9+hbFlkRoHLk7WV6QlnP8YM51VVZGP26Y7VY4MX2bV9hS hs5gGayk6iz3e8wDT13HAppmXEQJq18SewOIRGe+qadzxjqtMokzVO2aq qP2xDbuJQdeLybkuA40BYGyp4NPHwnPi0FHtqrD+6bHxLlTht5+5vyLBX HVoR1v/i6oWWEMyYEbWFn+VLibq+thQ5PN1i5SaQuAgKl4SlG5DtZQpVM 7VJgcxcS2j+Xv3C6wXoCgktNbUW4GKzLtA+mkauiaSIOGsoIWRrTLKZRP A==; X-CSE-ConnectionGUID: I6H4C0q9SQycctUoGnenKA== X-CSE-MsgGUID: C0u5mzhBSM6/mRIg/PJAbA== X-IronPort-AV: E=McAfee;i="6800,10657,11690"; a="58869522" X-IronPort-AV: E=Sophos;i="6.21,270,1763452800"; d="scan'208";a="58869522" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa110.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 03 Feb 2026 04:13:11 -0800 X-CSE-ConnectionGUID: fQ0yhWwURwO+qWpT5qZTOA== X-CSE-MsgGUID: 6CdExaoMTyel01JhIX6pkA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,270,1763452800"; d="scan'208";a="209250856" Received: from lkp-server01.sh.intel.com (HELO 765f4a05e27f) ([10.239.97.150]) by fmviesa007.fm.intel.com with ESMTP; 03 Feb 2026 04:13:07 -0800 Received: from kbuild by 765f4a05e27f with local (Exim 4.98.2) (envelope-from ) id 1vnFHE-00000000gcK-1HST; Tue, 03 Feb 2026 12:13:04 +0000 Date: Tue, 3 Feb 2026 20:12:57 +0800 From: kernel test robot To: Arnd Bergmann , Steven Rostedt , Masami Hiramatsu , Simon Horman , Jeff Layton , Anna Schumaker , Chuck Lever Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Arnd Bergmann , Mathieu Desnoyers , Andrew Morton , Linux Memory Management List , Andy Shevchenko , Randy Dunlap , Yury Norov , Joel Fernandes , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: Re: [PATCH] tracing: remove __printf() attribute on __ftrace_vbprintk() Message-ID: <202602032036.FQK7gJvV-lkp@intel.com> References: <20260202095834.1328352-1-arnd@kernel.org> Precedence: bulk X-Mailing-List: linux-trace-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <20260202095834.1328352-1-arnd@kernel.org> Hi Arnd, kernel test robot noticed the following build warnings: [auto build test WARNING on next-20260130] [cannot apply to trace/for-next linus/master v6.19-rc8 v6.19-rc7 v6.19-rc6 v6.19-rc8] [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/Arnd-Bergmann/tracing-remove-__printf-attribute-on-__ftrace_vbprintk/20260202-180958 base: next-20260130 patch link: https://lore.kernel.org/r/20260202095834.1328352-1-arnd%40kernel.org patch subject: [PATCH] tracing: remove __printf() attribute on __ftrace_vbprintk() config: riscv-allmodconfig (https://download.01.org/0day-ci/archive/20260203/202602032036.FQK7gJvV-lkp@intel.com/config) compiler: clang version 22.0.0git (https://github.com/llvm/llvm-project 9b8addffa70cee5b2acc5454712d9cf78ce45710) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260203/202602032036.FQK7gJvV-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/202602032036.FQK7gJvV-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/trace/trace_printk.c:212:34: warning: diagnostic behavior may be improved by adding the 'format(printf, 2, 3)' attribute to the declaration of '__trace_bprintk' [-Wmissing-format-attribute] 212 | ret = trace_vbprintk(ip, fmt, ap); | ^ include/linux/trace_printk.h:110:5: note: '__trace_bprintk' declared here 110 | int __trace_bprintk(unsigned long ip, const char *fmt, ...); | ^ 1 warning generated. vim +212 kernel/trace/trace_printk.c 1ba28e02a18cbd kernel/trace/trace_bprintk.c Lai Jiangshan 2009-03-06 199 48ead02030f849 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-12 200 int __trace_bprintk(unsigned long ip, const char *fmt, ...) 1427cdf0592368 kernel/trace/trace_bprintk.c Lai Jiangshan 2009-03-06 201 { 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 202 int ret; 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 203 va_list ap; 1427cdf0592368 kernel/trace/trace_bprintk.c Lai Jiangshan 2009-03-06 204 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 205 if (unlikely(!fmt)) 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 206 return 0; 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 207 b9f9108cad3998 kernel/trace/trace_printk.c Steven Rostedt (Red Hat 2015-09-29 208) if (!trace_printk_enabled) 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 209 return 0; 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 210 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 211 va_start(ap, fmt); 40ce74f19c2807 kernel/trace/trace_printk.c Steven Rostedt 2009-03-19 @212 ret = trace_vbprintk(ip, fmt, ap); 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 213 va_end(ap); 769b0441f438c4 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-06 214 return ret; 1427cdf0592368 kernel/trace/trace_bprintk.c Lai Jiangshan 2009-03-06 215 } 48ead02030f849 kernel/trace/trace_printk.c Frederic Weisbecker 2009-03-12 216 EXPORT_SYMBOL_GPL(__trace_bprintk); 1427cdf0592368 kernel/trace/trace_bprintk.c Lai Jiangshan 2009-03-06 217 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki