From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.12]) (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 C0ECF3914F8; Thu, 10 Sep 2026 14:41:29 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.12 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789051292; cv=none; b=pCHvFfU7G2G3VIlKWyFYRoJm3kwUb2CxlWYp65nFgCexGtwvrCC5XCtXO0ZxEGIIu43WtFWuFzXsm9EVtlN8MPnhR5hiMnrBwmflwLR4k1I1Ok2hcPXJjnNA9d5er+1JB6JJpL/fkx9DJSmS/Bc1PNMkJ2rnrVEidj2k8jVwPYI= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1789051292; c=relaxed/simple; bh=XhCBkvqoMM39WPHjPYto/5lKDTBSRqUhy/eqexVLdXc=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=Nh3rh8IHgsSfzj5r+eMdi3xlpBzCCGHIuHkE7E/Zi1JaNn7V35IdbEUkQ/Pz2EKMIDAouR9uJgBUlCZIJpU+qsUeS0B8TBYqLvC1coK6sm/0rQgSpVqf5eHqni+XlKcpH8KnsABjWWnJoXSciSiVVMWLTbigXxduzzDCl55po3Y= 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=YpoWFeAW; arc=none smtp.client-ip=198.175.65.12 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="YpoWFeAW" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1789051290; x=1820587290; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=XhCBkvqoMM39WPHjPYto/5lKDTBSRqUhy/eqexVLdXc=; b=YpoWFeAWs9/GtRTJicHXfhwev51nyXCCs53oAmPDIa9DrTb2ZcuTVCCS iL964DaPj5YFaR85nLCsos+WqoaSCOpgIy6YkS2k/uLQ3BO0prFWVDY53 /Ym8wrm67e2khU+HmFz4VIBSYRo73mxzSBILPfy7q7NsgaZ8Kepsj6lya /pDEexRGMv56VRh1rjzaeOZQWXoDJB2g90c6Ni+KzKopT5fJUEc9+ywXq uwLOfc2DP/2MMKQZPgUV9yrnJUMMr2UEMV/RiFLc+KamYEGg27Liu9Gxx CGWb0WDiwKkVIWD4sAhlW9ci8frUi1NeNVe2WfpRiBWMGmNWpVRLtSm+b Q==; X-CSE-ConnectionGUID: KQgA8M+CToG2c9CiaTftYA== X-CSE-MsgGUID: m0hVlNUyQmeC5RYmWa6b8A== X-IronPort-AV: E=McAfee;i="6800,10657,11901"; a="101021532" X-IronPort-AV: E=Sophos;i="6.27,95,1787036400"; d="scan'208";a="101021532" Received: from fmviesa006.fm.intel.com ([10.60.135.146]) by orvoesa104.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Sep 2026 07:41:29 -0700 X-CSE-ConnectionGUID: wPSlGokYQsuYOgEp9xRQwg== X-CSE-MsgGUID: pmxlIlzBTxCFVac71nW3RA== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.27,95,1787036400"; d="scan'208";a="267381710" Received: from lkp-server02.sh.intel.com (HELO 0a3643a6ed9d) ([10.239.97.151]) by fmviesa006.fm.intel.com with ESMTP; 10 Sep 2026 07:41:26 -0700 Received: from kbuild by 0a3643a6ed9d with local (Exim 4.98.2) (envelope-from ) id 1x4fxf-0000000007Z-2G9Z; Thu, 10 Sep 2026 14:41:15 +0000 Date: Thu, 10 Sep 2026 22:34:21 +0800 From: kernel test robot To: Kunwu Chan , jiangshanlai@gmail.com, paulmck@kernel.org, josh@joshtriplett.org, rostedt@goodmis.org, mathieu.desnoyers@efficios.com Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, rcu@vger.kernel.org, linux-kernel@vger.kernel.org, Kunwu Chan Subject: Re: [PATCH] srcutree: Skip torture to-big transition for atomic SRCU Message-ID: <202609102247.8X7GUWSj-lkp@intel.com> References: <20260910041427.3579817-1-kunwu.chan@gmail.com> Precedence: bulk X-Mailing-List: linux-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: <20260910041427.3579817-1-kunwu.chan@gmail.com> Hi Kunwu, kernel test robot noticed the following build errors: [auto build test ERROR on rcu/rcu/dev] [also build test ERROR on linus/master v7.3-rc2 next-20260909] [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/Kunwu-Chan/srcutree-Skip-torture-to-big-transition-for-atomic-SRCU/20260910-121427 base: https://git.kernel.org/pub/scm/linux/kernel/git/rcu/linux.git rcu/dev patch link: https://lore.kernel.org/r/20260910041427.3579817-1-kunwu.chan%40gmail.com patch subject: [PATCH] srcutree: Skip torture to-big transition for atomic SRCU config: s390-allnoconfig (https://download.01.org/0day-ci/archive/20260910/202609102247.8X7GUWSj-lkp@intel.com/config) compiler: clang version 24.0.0git (https://github.com/llvm/llvm-project d3db069999553568848400c84cbf815c03f5470f) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260910/202609102247.8X7GUWSj-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/202609102247.8X7GUWSj-lkp@intel.com/ All errors (new ones prefixed by >>): >> kernel/rcu/srcutree.c:2080:61: error: use of undeclared identifier 'SRCU_READ_FLAVOR_ATOMIC' 2080 | if (SRCU_SIZING_IS_TORTURE() && ssp->srcu_reader_flavor != SRCU_READ_FLAVOR_ATOMIC) | ^~~~~~~~~~~~~~~~~~~~~~~ 1 error generated. vim +/SRCU_READ_FLAVOR_ATOMIC +2080 kernel/rcu/srcutree.c 2031 2032 void srcu_torture_stats_print(struct srcu_struct *ssp, char *tt, char *tf) 2033 { 2034 int cpu; 2035 int idx; 2036 unsigned long s0 = 0, s1 = 0; 2037 int ss_state = READ_ONCE(ssp->srcu_sup->srcu_size_state); 2038 int ss_state_idx = ss_state; 2039 2040 idx = ssp->srcu_ctrp - &ssp->sda->srcu_ctrs[0]; 2041 if (ss_state < 0 || ss_state >= ARRAY_SIZE(srcu_size_state_name)) 2042 ss_state_idx = ARRAY_SIZE(srcu_size_state_name) - 1; 2043 pr_alert("%s%s Tree SRCU g%ld state %d (%s)", 2044 tt, tf, rcu_seq_current(&ssp->srcu_sup->srcu_gp_seq), ss_state, 2045 srcu_size_state_name[ss_state_idx]); 2046 if (!ssp->sda) { 2047 // Called after cleanup_srcu_struct(), perhaps. 2048 pr_cont(" No per-CPU srcu_data structures (->sda == NULL).\n"); 2049 } else { 2050 pr_cont(" per-CPU(idx=%d):", idx); 2051 for_each_possible_cpu(cpu) { 2052 unsigned long l0, l1; 2053 unsigned long u0, u1; 2054 long c0, c1; 2055 struct srcu_data *sdp; 2056 2057 sdp = per_cpu_ptr(ssp->sda, cpu); 2058 u0 = data_race(atomic_long_read(&sdp->srcu_ctrs[!idx].srcu_unlocks)); 2059 u1 = data_race(atomic_long_read(&sdp->srcu_ctrs[idx].srcu_unlocks)); 2060 2061 /* 2062 * Make sure that a lock is always counted if the corresponding 2063 * unlock is counted. 2064 */ 2065 smp_rmb(); 2066 2067 l0 = data_race(atomic_long_read(&sdp->srcu_ctrs[!idx].srcu_locks)); 2068 l1 = data_race(atomic_long_read(&sdp->srcu_ctrs[idx].srcu_locks)); 2069 2070 c0 = l0 - u0; 2071 c1 = l1 - u1; 2072 pr_cont(" %d(%ld,%ld %c)", 2073 cpu, c0, c1, 2074 "C."[rcu_segcblist_empty(&sdp->srcu_cblist)]); 2075 s0 += c0; 2076 s1 += c1; 2077 } 2078 pr_cont(" T(%ld,%ld)\n", s0, s1); 2079 } > 2080 if (SRCU_SIZING_IS_TORTURE() && ssp->srcu_reader_flavor != SRCU_READ_FLAVOR_ATOMIC) 2081 srcu_transition_to_big(ssp); 2082 } 2083 EXPORT_SYMBOL_GPL(srcu_torture_stats_print); 2084 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki