From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.9]) (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 0677C3CAE92 for ; Tue, 24 Mar 2026 07:29:31 +0000 (UTC) Authentication-Results: smtp.subspace.kernel.org; arc=none smtp.client-ip=192.198.163.9 ARC-Seal:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774337379; cv=none; b=aw07MmlvOIj3yUCvkc8yBB+9dO6PAdB9AXe8NKdU0OZRmqLjfk0F/djMqtAuXF09/jpukjTKBtAV0NovVmcYoTvpAB+Ao8J7YNqEY8RRFHptzeguzAZrqkp37kvtQ3zoluFAqXszR4VtAw59Gak4JUXDmNRmAg1X/RKQmulZ2BA= ARC-Message-Signature:i=1; a=rsa-sha256; d=subspace.kernel.org; s=arc-20240116; t=1774337379; c=relaxed/simple; bh=Ioa30xAHMdOVcu8s3ASXI/cggI1C5ChLpTuGKPoAte0=; h=Date:From:To:Cc:Subject:Message-ID; b=kDix7Bb/f/i0CXwAi0aEkVbCS74QXmkLHhfiTJ0xcWFniUYE0WuK5H7Ls1dcO7zGUQ34Dndpi8kgdkzBiZ+GyU228m8AuZOzprfG22PQNYULqopvcEO6eAwmR8cNVlJzwH58yWdB0dy2TeB4Dx5WG5o5OOKGXgXUh374OR3bdXw= 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=gVumOpDe; arc=none smtp.client-ip=192.198.163.9 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="gVumOpDe" DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1774337372; x=1805873372; h=date:from:to:cc:subject:message-id; bh=Ioa30xAHMdOVcu8s3ASXI/cggI1C5ChLpTuGKPoAte0=; b=gVumOpDeIFVQXDBxwQK9j8ALakcXPskdjdFcuG3FpmipuHBz3VC8WdHo L8HctdaKOZwNwNgsny39dPQR+1t4lb/DIzdP4W6jSLrNrhWp4O3flo/bd R4X0tHpqi+ZoB8DgWnhGEpP2UzfM1gymDtPLk8gL5FfYa8VtDCSOLW7zo mJCzdRlY7UPeVeROdwwHoEC3pwjBrKaD7EhF9ZybkbqPpIIi73blIAQnK hhvQWG+rp6FKONcvF+DpXYjF9Bn3UZ+JPRHOgd8510GMyxcupZrEz93Wd cF0Nl+GNbevlI0eKOmjbXr/0C7T6mo5qTrB3CYqi7hSG5b0vc8nmAZYhX g==; X-CSE-ConnectionGUID: xRv/40J5Q+S5WYDNPBOmtg== X-CSE-MsgGUID: hMxrZlwUTy6wppHIHDWZ4g== X-IronPort-AV: E=McAfee;i="6800,10657,11738"; a="86043499" X-IronPort-AV: E=Sophos;i="6.23,138,1770624000"; d="scan'208";a="86043499" Received: from fmviesa007.fm.intel.com ([10.60.135.147]) by fmvoesa103.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 24 Mar 2026 00:29:31 -0700 X-CSE-ConnectionGUID: OcXI5ZQVSV2K7Hzc2mf4kA== X-CSE-MsgGUID: lwdHUBgFTo2TjpHI5Aa9yg== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.23,138,1770624000"; d="scan'208";a="220942394" Received: from lkp-server01.sh.intel.com (HELO 3905d212be1b) ([10.239.97.150]) by fmviesa007.fm.intel.com with ESMTP; 24 Mar 2026 00:29:29 -0700 Received: from kbuild by 3905d212be1b with local (Exim 4.98.2) (envelope-from ) id 1w4wCc-00000000491-0yNW; Tue, 24 Mar 2026 07:29:26 +0000 Date: Tue, 24 Mar 2026 15:28:53 +0800 From: kernel test robot To: FUJITA Tomonori Cc: oe-kbuild-all@lists.linux.dev, linux-kernel@vger.kernel.org, Boqun Feng , Alice Ryhl , Gary Guo Subject: ld.lld: error: undefined symbol: __bad_xchg Message-ID: <202603241515.r4UkDrTF-lkp@intel.com> User-Agent: s-nail v14.9.25 Precedence: bulk X-Mailing-List: oe-kbuild-all@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: c369299895a591d96745d6492d4888259b004a9e commit: 5dbc0a692459bc49cdb7add281086291da547750 rust: helpers: Add i8/i16 atomic xchg helpers date: 2 months ago config: arm-randconfig-r064-20260324 (https://download.01.org/0day-ci/archive/20260324/202603241515.r4UkDrTF-lkp@intel.com/config) compiler: clang version 23.0.0git (https://github.com/llvm/llvm-project 054e11d1a17e5ba88bb1a8ef32fad3346e80b186) rustc: rustc 1.88.0 (6b00bc388 2025-06-23) reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20260324/202603241515.r4UkDrTF-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/202603241515.r4UkDrTF-lkp@intel.com/ All errors (new ones prefixed by >>): >> ld.lld: error: undefined symbol: __bad_xchg >>> referenced by helpers.c >>> rust/helpers/helpers.o:(rust_helper_atomic_i8_xchg) in archive vmlinux.a >>> referenced by helpers.c >>> rust/helpers/helpers.o:(rust_helper_atomic_i16_xchg) in archive vmlinux.a -- 0-DAY CI Kernel Test Service https://github.com/intel/lkp-tests/wiki