From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.13]) (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 C2EBE31AF14; Wed, 11 Mar 2026 11:24:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.13 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773228273; cv=none; b=keiNhIE03q5t2J1bmlFYlJ/78iVNqi5WFd9R9xM9NNQTvDSxzRc7ZoWM24f4Mav4NNlvKg53vvKwN2uZEO7ehYd+TaOTIDJrXVBMhtrxfd45+p2bMA1tPfsyWY5Qbh5hx7VUjLcbKfMlEP836p8UwGDFH3b4OsHp96UXVsyvSHQ= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773228273; c=relaxed/simple; bh=MrItGMIwck97yHNleIjnWht9bi1GncmtA9PeyGCwBMs=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=WmKNh90IABhcOhAPHUnUD4qtNfeszU4FQhcyEdSx6Lsm1DPzAj43zmHqB1uqaEPy5oPuEAtey7zY9Ea1lbEMCe4H8RBfpn6ISfsjUHjBc4HaM3ksAQnoDsMPYLRoDHCJYH8z1ccr2XVHVRsfnekKB/YdEyYT9uvrM6uEii1DRiA= 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=MYq4aiiN; arc=none smtp.client-ip=192.198.163.13 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="MYq4aiiN" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1773228270; x=1804764270; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=MrItGMIwck97yHNleIjnWht9bi1GncmtA9PeyGCwBMs=; b=MYq4aiiNcAj5ktb+64ocsttd3c4a6hVf+QJrbRnHp9WdCeu1rugE3NK/ 7SMt82BAHNa5ILytFUEHU3Gp4s+SM5V0urn14EryCkXlXNthWR3CYrKEm jbibDNdWW570xIPk/7Nu6uD+fcL8sYi3pAksecEF35gMfVnD5ryUp/r4Q WzgOcfqu1NskvX3TIBnArsefiEnctznNtoymVl6b3ISvqMCVRf0XNOTWV xGdPuvBI0NaVMGPJnuZSwd1Dzk3kQIlTszicBIt8in1nYEC3nN3b4L1/y zHlOlpqggaV7uw7ipxat0I5t7fv7mIIyipwXK19SROWZ76Q1Kb79pBOkF A==; X-CSE-ConnectionGUID: 5TMMtCu1SzSgsVMgQGuCoQ== X-CSE-MsgGUID: ye5+/K3VTqWal0jEAvfB9g== X-IronPort-AV: E=McAfee;i="6800,10657,11725"; a="76903766" X-IronPort-AV: E=Sophos;i="6.23,113,1770624000"; d="scan'208";a="76903766" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa107.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Mar 2026 04:24:29 -0700 X-CSE-ConnectionGUID: fw1E74arR96VolAP3q/Egw== X-CSE-MsgGUID: gTH9KMjeTPWUWgVUI7QD2Q== X-ExtLoop1: 1 Received: from lkp-server01.sh.intel.com (HELO 418530b1a366) ([10.239.97.150]) by fmviesa003.fm.intel.com with ESMTP; 11 Mar 2026 04:24:25 -0700 Received: from kbuild by 418530b1a366 with local (Exim 4.98.2) (envelope-from ) id 1w0Hfr-0000000014P-0HV2; Wed, 11 Mar 2026 11:24:23 +0000 Date: Wed, 11 Mar 2026 19:23:39 +0800 From: kernel test robot To: Steven Rostedt , linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Cc: oe-kbuild-all@lists.linux.dev, Masami Hiramatsu , Mark Rutland , Mathieu Desnoyers , Andrew Morton , Linux Memory Management List , Thomas Gleixner , Brian Geffon , John Stultz , Ian Rogers , Suleiman Souhlal Subject: Re: [PATCH v2 1/3] tracing: Have futex syscall trace event show specific user data Message-ID: <202603111911.zAWpiGlz-lkp@intel.com> References: <20260310201036.542627924@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: <20260310201036.542627924@kernel.org> Hi Steven, kernel test robot noticed the following build warnings: [auto build test WARNING on tip/locking/core] [also build test WARNING on trace/for-next akpm-mm/mm-everything linus/master v7.0-rc3 next-20260310] [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-Have-futex-syscall-trace-event-show-specific-user-data/20260311-041422 base: tip/locking/core patch link: https://lore.kernel.org/r/20260310201036.542627924%40kernel.org patch subject: [PATCH v2 1/3] tracing: Have futex syscall trace event show specific user data config: arc-randconfig-001-20260311 (https://download.01.org/0day-ci/archive/20260311/202603111911.zAWpiGlz-lkp@intel.com/config) compiler: arc-linux-gcc (GCC) 14.3.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260311/202603111911.zAWpiGlz-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/202603111911.zAWpiGlz-lkp@intel.com/ All warnings (new ones prefixed by >>): kernel/trace/trace_syscalls.c: In function 'syscall_get_futex': >> kernel/trace/trace_syscalls.c:807:15: warning: variable 'buf' set but not used [-Wunused-but-set-variable] 807 | char *buf; | ^~~ vim +/buf +807 kernel/trace/trace_syscalls.c 801 802 static int 803 syscall_get_futex(unsigned long *args, char **buffer, int *size, int buf_size) 804 { 805 struct syscall_user_buffer *sbuf; 806 const char __user *ptr; > 807 char *buf; 808 809 /* buf_size of zero means user doesn't want user space read */ 810 if (!buf_size) 811 return -1; 812 813 /* If the syscall_buffer is NULL, tracing is being shutdown */ 814 sbuf = READ_ONCE(syscall_buffer); 815 if (!sbuf) 816 return -1; 817 818 ptr = (char __user *)args[0]; 819 820 *buffer = trace_user_fault_read(&sbuf->buf, ptr, 4, NULL, NULL); 821 if (!*buffer) 822 return -1; 823 824 /* Add room for the value */ 825 *size += 4; 826 827 buf = *buffer; 828 829 return 0; 830 } 831 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki