From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.19]) (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 2C8F82D3EDD for ; Fri, 27 Jun 2025 12:35:03 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.19 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751027704; cv=none; b=P3aA3CX0BDKpnzBth14a87lw31FPxGXcGWyQfWb+cysM3fPX9y6jhxPuU15L40DO1w1gfEwCZyPpgkBwZXAnv3SMNNSIMqMQjefKQHVwfhDOy3cQvQ1oiPLXHxKeOZ4x3LZwD0lrx4n66giI6RHlefqIYLVK+BBONXbN1WwDRss= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1751027704; c=relaxed/simple; bh=lAbjC1rMmOpw3Y5SIUdpktKEiwkYb7MTJbo/4rGAvsM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=szo/4aFcQJX+hkcz5C5t+dVFkwsM21H66+nRK915iLe1qFDHmTszlsFNBYbDejDu0wsxD65QT1EyCdBzUgLXrvvSIY2io0AZ6TEV/FKHL1wfBdroUjF2D82v+1G7GZ2iKSIlKAwbCaAYhF6SDLLd8gq2DoUkbVXr8wnUaC/WsKM= 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=lSfSjODz; arc=none smtp.client-ip=192.198.163.19 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="lSfSjODz" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1751027703; x=1782563703; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=lAbjC1rMmOpw3Y5SIUdpktKEiwkYb7MTJbo/4rGAvsM=; b=lSfSjODzmNUOHpOuvTrjxHMEhDMhy5bJO/uwg4Pitu2kZBZFmFhfU3VU 0Q2PAKSEBOC4Cg3FCbj0jhyrjpvB8WFvbxwdYNSYcHTWt2PeBZdonR26J 5YK7OQdGxZYu9QdmAIEj7MwpOAchDolqaZf+v+A/JIfevYHw/HhzRKOSa DSJ0f1c+qxV6D3TebG/sqET99dX4Vk5bKLB3+g5rX8vm3qf2O5T0J2Hg3 H5lnNV6OO5YruilEg6nqpifuVvtHJnb+8Cyv2PwtpunO1vQvAW5kPn8t8 bU9fN3UHdAhx75eg3cWehWqBdBje4wb5RlDL9vQaeBClTQ3ryMgEKStKU Q==; X-CSE-ConnectionGUID: DexytiOWT2ye89sHruCy3A== X-CSE-MsgGUID: uw4Dl7lIQSyB0+5BRSfBIQ== X-IronPort-AV: E=McAfee;i="6800,10657,11476"; a="52458922" X-IronPort-AV: E=Sophos;i="6.16,270,1744095600"; d="scan'208";a="52458922" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa113.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Jun 2025 05:35:01 -0700 X-CSE-ConnectionGUID: Ecej+RiLT062BvHRv6nqPA== X-CSE-MsgGUID: TygrQ0gfTjeljWcCgm8jFw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.16,270,1744095600"; d="scan'208";a="157176713" Received: from lkp-server01.sh.intel.com (HELO e8142ee1dce2) ([10.239.97.150]) by orviesa003.jf.intel.com with ESMTP; 27 Jun 2025 05:34:58 -0700 Received: from kbuild by e8142ee1dce2 with local (Exim 4.96) (envelope-from ) id 1uV8IB-000WA8-1F; Fri, 27 Jun 2025 12:34:55 +0000 Date: Fri, 27 Jun 2025 20:34:24 +0800 From: kernel test robot To: Alexander Potapenko Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, quic_jiangenj@quicinc.com, linux-kernel@vger.kernel.org, kasan-dev@googlegroups.com, Aleksandr Nogikh , Andrey Konovalov , Borislav Petkov , Dave Hansen , Dmitry Vyukov , Ingo Molnar , Josh Poimboeuf , Marco Elver , Thomas Gleixner Subject: Re: [PATCH v2 07/11] kcov: add trace and trace_size to struct kcov_state Message-ID: <202506271946.HACEE9U0-lkp@intel.com> References: <20250626134158.3385080-8-glider@google.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: <20250626134158.3385080-8-glider@google.com> Hi Alexander, kernel test robot noticed the following build warnings: [auto build test WARNING on tip/x86/core] [cannot apply to akpm-mm/mm-everything tip/sched/core arnd-asm-generic/master akpm-mm/mm-nonmm-unstable masahiroy-kbuild/for-next masahiroy-kbuild/fixes shuah-kselftest/next shuah-kselftest/fixes linus/master mcgrof/modules-next v6.16-rc3 next-20250627] [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/Alexander-Potapenko/x86-kcov-disable-instrumentation-of-arch-x86-kernel-tsc-c/20250626-214703 base: tip/x86/core patch link: https://lore.kernel.org/r/20250626134158.3385080-8-glider%40google.com patch subject: [PATCH v2 07/11] kcov: add trace and trace_size to struct kcov_state config: x86_64-buildonly-randconfig-004-20250627 (https://download.01.org/0day-ci/archive/20250627/202506271946.HACEE9U0-lkp@intel.com/config) compiler: clang version 20.1.7 (https://github.com/llvm/llvm-project 6146a88f60492b520a36f8f8f3231e15f3cc6082) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20250627/202506271946.HACEE9U0-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/202506271946.HACEE9U0-lkp@intel.com/ All warnings (new ones prefixed by >>): >> kernel/kcov.c:1013:15: warning: variable 'trace' set but not used [-Wunused-but-set-variable] 1013 | void *area, *trace; | ^ >> kernel/kcov.c:1014:21: warning: variable 'trace_size' set but not used [-Wunused-but-set-variable] 1014 | unsigned int size, trace_size; | ^ 2 warnings generated. vim +/trace +1013 kernel/kcov.c 1006 1007 /* See the comment before kcov_remote_start() for usage details. */ 1008 void kcov_remote_stop(void) 1009 { 1010 struct task_struct *t = current; 1011 struct kcov *kcov; 1012 unsigned int mode; > 1013 void *area, *trace; > 1014 unsigned int size, trace_size; 1015 int sequence; 1016 unsigned long flags; 1017 1018 if (!in_task() && !in_softirq_really()) 1019 return; 1020 1021 local_lock_irqsave(&kcov_percpu_data.lock, flags); 1022 1023 mode = READ_ONCE(t->kcov_mode); 1024 barrier(); 1025 if (!kcov_mode_enabled(mode)) { 1026 local_unlock_irqrestore(&kcov_percpu_data.lock, flags); 1027 return; 1028 } 1029 /* 1030 * When in softirq, check if the corresponding kcov_remote_start() 1031 * actually found the remote handle and started collecting coverage. 1032 */ 1033 if (in_serving_softirq() && !t->kcov_softirq) { 1034 local_unlock_irqrestore(&kcov_percpu_data.lock, flags); 1035 return; 1036 } 1037 /* Make sure that kcov_softirq is only set when in softirq. */ 1038 if (WARN_ON(!in_serving_softirq() && t->kcov_softirq)) { 1039 local_unlock_irqrestore(&kcov_percpu_data.lock, flags); 1040 return; 1041 } 1042 1043 kcov = t->kcov; 1044 area = t->kcov_state.area; 1045 size = t->kcov_state.size; 1046 trace = t->kcov_state.trace; 1047 trace_size = t->kcov_state.trace_size; 1048 sequence = t->kcov_state.sequence; 1049 1050 kcov_stop(t); 1051 if (in_serving_softirq()) { 1052 t->kcov_softirq = 0; 1053 kcov_remote_softirq_stop(t); 1054 } 1055 1056 spin_lock(&kcov->lock); 1057 /* 1058 * KCOV_DISABLE could have been called between kcov_remote_start() 1059 * and kcov_remote_stop(), hence the sequence check. 1060 */ 1061 if (sequence == kcov->state.sequence && kcov->remote) 1062 kcov_move_area(kcov->mode, kcov->state.area, kcov->state.size, 1063 area); 1064 spin_unlock(&kcov->lock); 1065 1066 if (in_task()) { 1067 spin_lock(&kcov_remote_lock); 1068 kcov_remote_area_put(area, size); 1069 spin_unlock(&kcov_remote_lock); 1070 } 1071 1072 local_unlock_irqrestore(&kcov_percpu_data.lock, flags); 1073 1074 /* Get in kcov_remote_start(). */ 1075 kcov_put(kcov); 1076 } 1077 EXPORT_SYMBOL(kcov_remote_stop); 1078 -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki