From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from mga01.intel.com (mga01.intel.com [192.55.52.88]) (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 C259B2574 for ; Fri, 11 Mar 2022 20:55:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647032109; x=1678568109; h=date:from:to:cc:subject:message-id:mime-version; bh=Eft7ilMFBTtn33WKAneo4xUPJ38xQRQ0vY+nWyGwX7A=; b=cKQxzuElJZMP2p7KgbKdW9+KfywrmH5wYSmTD+KeMM43NWQ9qmn35r+V 18P5G2qIuswlaHuRtUbdsCkyIUMtpn53CTm5ApSXa/AbkSH4WVYCWCfwb f12YGeXeD7ftvm5pKF0Ww8gp7UmHKJuUi7aETDiQza5R3EfN9bgoORzZ3 1IWzrBQ1TLVXafx9OQTjgIAUJag/K7z5ZVaOgSGvYrsoqS0jcLo0n19eT nrU5UEsYBmiOPJLHUhhjTBqKny7SpCtxmgnawCtOpmvYe+bTihLhp073l t9oHt3lrPwb4K59h6ZSVc0Jfk6jbYUoB4WusSiussnNPrnx2iRz58Sg6x Q==; X-IronPort-AV: E=McAfee;i="6200,9189,10283"; a="280397438" X-IronPort-AV: E=Sophos;i="5.90,174,1643702400"; d="scan'208";a="280397438" Received: from orsmga006.jf.intel.com ([10.7.209.51]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Mar 2022 12:55:09 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,174,1643702400"; d="scan'208";a="514633839" Received: from lkp-server02.sh.intel.com (HELO 89b41b6ae01c) ([10.239.97.151]) by orsmga006.jf.intel.com with ESMTP; 11 Mar 2022 12:55:06 -0800 Received: from kbuild by 89b41b6ae01c with local (Exim 4.92) (envelope-from ) id 1nSmHy-00075B-56; Fri, 11 Mar 2022 20:55:06 +0000 Date: Sat, 12 Mar 2022 04:54:24 +0800 From: kernel test robot To: Peter Collingbourne Cc: llvm@lists.linux.dev, kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Will Deacon , Catalin Marinas Subject: arch/arm64/kernel/mte.c:197:13: warning: no previous prototype for function 'kasan_hw_tags_enable' Message-ID: <202203120429.Fx8bkRdV-lkp@intel.com> Precedence: bulk X-Mailing-List: llvm@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Hi Peter, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 79b00034e9dcd2b065c1665c8b42f62b6b80a9be commit: e5af50a5df571c1d0268b02f924de49b742c990f arm64: kasan: mte: move GCR_EL1 switch to task switch when KASAN disabled date: 5 months ago config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220312/202203120429.Fx8bkRdV-lkp@intel.com/config) compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project 276ca87382b8f16a65bddac700202924228982f6) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm64 cross compiling tool for clang build # apt-get install binutils-aarch64-linux-gnu # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=e5af50a5df571c1d0268b02f924de49b742c990f git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout e5af50a5df571c1d0268b02f924de49b742c990f # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/kernel/ drivers/gpu/drm/tegra/ drivers/usb/host/ kernel/debug/kdb/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> arch/arm64/kernel/mte.c:197:13: warning: no previous prototype for function 'kasan_hw_tags_enable' [-Wmissing-prototypes] void __init kasan_hw_tags_enable(struct alt_instr *alt, __le32 *origptr, ^ arch/arm64/kernel/mte.c:197:1: note: declare 'static' if the function is not intended to be used outside of this translation unit void __init kasan_hw_tags_enable(struct alt_instr *alt, __le32 *origptr, ^ static arch/arm64/kernel/mte.c:103:20: warning: unused function '__mte_enable_kernel' [-Wunused-function] static inline void __mte_enable_kernel(const char *mode, unsigned long tcf) ^ 2 warnings generated. vim +/kasan_hw_tags_enable +197 arch/arm64/kernel/mte.c 196 > 197 void __init kasan_hw_tags_enable(struct alt_instr *alt, __le32 *origptr, 198 __le32 *updptr, int nr_inst) 199 { 200 BUG_ON(nr_inst != 1); /* Branch -> NOP */ 201 202 if (kasan_hw_tags_enabled()) 203 *updptr = cpu_to_le32(aarch64_insn_gen_nop()); 204 } 205 --- 0-DAY CI Kernel Test Service https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org