From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.15]) (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 8D35B375ABE; Wed, 11 Mar 2026 07:41:55 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.15 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773214922; cv=none; b=LMmj+p/ieOzvhEaD+FiTwIuqUlLlbnjMLo7m3PBPOtet/Rzq5enrqF6ZXcR+3vI/x+wl/4aO32a6QbuelE9tww8ZovovtXnqa2epjuyo4Wzm71JOkwsdmpyBPalIS8NDYwa9SK+r9rZRUyfYSN4Mmfp4so/oPhREHNPyx/Y33D0= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1773214922; c=relaxed/simple; bh=VOyzQxkiOrYyQ5++xZdWU53tYlT+cG5P+BjBAxzOJqE=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=K501UXzwFhTAzTERAaaUDOf7Ttu9iBnngbkV07vkHe/N1lQmoig217KwfWRNcaaCTHdsDr7/e3bg97PD7aHzKg2miZg+xPYBHKIWB1/ejxc+zb/nklRPTmEOn72C1LaCX8RfH3Ru6A5zDdmYSCmzgMX0+UQmP56PABAOE5I+0kc= 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=i/g98Z3v; arc=none smtp.client-ip=192.198.163.15 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="i/g98Z3v" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1773214917; x=1804750917; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=VOyzQxkiOrYyQ5++xZdWU53tYlT+cG5P+BjBAxzOJqE=; b=i/g98Z3vlJUCba4TEfFE0CQ9+ibaatvxbeMrkE2JeMoxVjlpRMzTdSgv MZ6FFOQ6S7ry2rfu0Vhb82yqXGCq7mbKZN1vvl4C7UTwvbutnep0QOw9l rYfDI4HAcA2H7xTOJT9UA2jDfHOfqwpHX7Djm/QaPHVN5b/tmvhKb3Skp cVSO4JJd256RyYpH9JB96yYq48OCSDDg36x1jMZ43MsZ9VIZtDpIOYttd utVgOaOVaEo+Tkye334EjYQAoM8FyIJ5vXqCpUTeYhzITkF1JUZFlW4Dv rvgtidV2qrGzhcEq54bA0YfR/5YjNJLaeWgEON1Bd3GYytzX+JcbIzTW8 w==; X-CSE-ConnectionGUID: l2XIoVuhQLqkK978cd4EmQ== X-CSE-MsgGUID: rZqaJT5AT429v1lqpXk+7Q== X-IronPort-AV: E=McAfee;i="6800,10657,11725"; a="74394421" X-IronPort-AV: E=Sophos;i="6.23,113,1770624000"; d="scan'208";a="74394421" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by fmvoesa109.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Mar 2026 00:41:55 -0700 X-CSE-ConnectionGUID: /X5V1c6LS9+3qp302cC7lw== X-CSE-MsgGUID: l2aL8VOtTrCZh90fqg3DCw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,113,1770624000"; d="scan'208";a="243391357" Received: from igk-lkp-server01.igk.intel.com (HELO 9958d990ccf2) ([10.211.93.152]) by fmviesa002.fm.intel.com with ESMTP; 11 Mar 2026 00:41:51 -0700 Received: from kbuild by 9958d990ccf2 with local (Exim 4.98.2) (envelope-from ) id 1w0ECT-000000003HV-28cV; Wed, 11 Mar 2026 07:41:49 +0000 Date: Wed, 11 Mar 2026 08:41:35 +0100 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: <202603110841.Pxedg2y4-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: x86_64-rhel-9.4 (https://download.01.org/0day-ci/archive/20260311/202603110841.Pxedg2y4-lkp@intel.com/config) compiler: gcc-14 (Debian 14.2.0-19) 14.2.0 reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260311/202603110841.Pxedg2y4-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/202603110841.Pxedg2y4-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