From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.20]) (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 EEE6C311C17; Mon, 12 Jan 2026 19:22:45 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=198.175.65.20 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768245767; cv=none; b=PoZtR1j3bdfJw55KXkT8mnGWCf2DPt25KFUPuyu8zzNZcOQCVZZ9ld3MSMLg8P+PFptaIWcFgUxVE7pGA41yFG57Aqz4kpEPLtgrbZmJCb4E3jhJF1wRweBoK7MF1dQ5I7NwUJVQq3VmJvNg0vZaUBwWhWt/RVWhdOSPj6FaVME= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1768245767; c=relaxed/simple; bh=gy3vUzeNs/9BwKXtMR4uniH68yQHA+hJ41Jnz6faEIM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:Content-Disposition:In-Reply-To; b=oUdIc3Z3B+utFvoVnYVOK5U3Tk/OrY/7heVycXv0xHbUCTGZc5UFlzaL5lFU7il+RdaC0RHT71sSSvMc2Db6JBXuT96U1I3tuISr3DU63l2SO38LBMFh8wuWBhko1IzAzfBIOSHNy/y2ROnmg4DFqi9SyN2sEX1g2beuvegXTpQ= 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=ZMc2VYzS; arc=none smtp.client-ip=198.175.65.20 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="ZMc2VYzS" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1768245766; x=1799781766; h=date:from:to:cc:subject:message-id:references: mime-version:in-reply-to; bh=gy3vUzeNs/9BwKXtMR4uniH68yQHA+hJ41Jnz6faEIM=; b=ZMc2VYzSquSajN6kv1927+5UfrI12PNR7To/VfrurD/W1STSoH36TWr3 v13giALa9e9vzUTR0N6c6xeZaF7feKH8bOMzXl/s1ofyEHp12m3B1xc0i pGyINlwiaShF70RMA7siAbQPX77c2rveBmBxjJVcTHGOXdSMQwRejaGnF 01fLtCNFJKczPjtSSFTYpASmByWkkEhD0pCtzMxfK8Gi8J7AFLYPB0KHp Zp69V9E7UtHEoK5950/GJjqTPveGdxwqM5hN6DlaG1CG1cELFPJvuCC+M yXKBELwTK7yTfR40/btjmIeD0+7aU8OeV+u4ZDOnth+OSGOu7ePblQclV g==; X-CSE-ConnectionGUID: iuBLUA5TQN2VbdU4j5CfyA== X-CSE-MsgGUID: XOG1mdt3SziU7q191vypPQ== X-IronPort-AV: E=McAfee;i="6800,10657,11669"; a="69259621" X-IronPort-AV: E=Sophos;i="6.21,221,1763452800"; d="scan'208";a="69259621" Received: from fmviesa001.fm.intel.com ([10.60.135.141]) by orvoesa112.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 12 Jan 2026 11:22:45 -0800 X-CSE-ConnectionGUID: CjsHXDcET8G3zdx532W5jQ== X-CSE-MsgGUID: Et1a2lnCR3m3hPhoCRr6cw== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.21,221,1763452800"; d="scan'208";a="235411831" Received: from igk-lkp-server01.igk.intel.com (HELO 8581b2e2a62c) ([10.211.93.152]) by fmviesa001.fm.intel.com with ESMTP; 12 Jan 2026 11:22:39 -0800 Received: from kbuild by 8581b2e2a62c with local (Exim 4.98.2) (envelope-from ) id 1vfNUq-000000000yP-3Vw4; Mon, 12 Jan 2026 19:22:36 +0000 Date: Mon, 12 Jan 2026 20:22:22 +0100 From: kernel test robot To: Leon Hwang , bpf@vger.kernel.org Cc: llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Alexei Starovoitov , Daniel Borkmann , Andrii Nakryiko , Martin KaFai Lau , Eduard Zingerman , Song Liu , Yonghong Song , John Fastabend , KP Singh , Stanislav Fomichev , Hao Luo , Jiri Olsa , "David S . Miller" , David Ahern , Thomas Gleixner , Ingo Molnar , Borislav Petkov , Dave Hansen , x86@kernel.org, "H . Peter Anvin" , Matt Bobrowski , Steven Rostedt , Masami Hiramatsu , Mathieu Desnoyers , Shuah Khan , Leon Hwang , netdev@vger.kernel.org, linux-kernel@vger.kernel.org, linux-trace-kernel@vger.kernel.org Subject: Re: [PATCH bpf-next 2/3] bpf: Introduce BPF_BRANCH_SNAPSHOT_F_COPY flag for bpf_get_branch_snapshot helper Message-ID: <202601122013.hmoeIXXs-lkp@intel.com> References: <20260109153420.32181-3-leon.hwang@linux.dev> Precedence: bulk X-Mailing-List: netdev@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: <20260109153420.32181-3-leon.hwang@linux.dev> Hi Leon, kernel test robot noticed the following build errors: [auto build test ERROR on bpf-next/master] url: https://github.com/intel-lab-lkp/linux/commits/Leon-Hwang/bpf-x64-Call-perf_snapshot_branch_stack-in-trampoline/20260109-234435 base: https://git.kernel.org/pub/scm/linux/kernel/git/bpf/bpf-next.git master patch link: https://lore.kernel.org/r/20260109153420.32181-3-leon.hwang%40linux.dev patch subject: [PATCH bpf-next 2/3] bpf: Introduce BPF_BRANCH_SNAPSHOT_F_COPY flag for bpf_get_branch_snapshot helper config: x86_64-kexec (https://download.01.org/0day-ci/archive/20260112/202601122013.hmoeIXXs-lkp@intel.com/config) compiler: clang version 20.1.8 (https://github.com/llvm/llvm-project 87f0227cb60147a26a1eeb4fb06e3b505e9c7261) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260112/202601122013.hmoeIXXs-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/202601122013.hmoeIXXs-lkp@intel.com/ All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: bpf_branch_snapshot >>> referenced by bpf_trace.c:1182 (kernel/trace/bpf_trace.c:1182) >>> vmlinux.o:(bpf_get_branch_snapshot) >>> referenced by bpf_trace.c:0 (kernel/trace/bpf_trace.c:0) >>> vmlinux.o:(bpf_get_branch_snapshot) -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki