From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id C4FE4C433EF for ; Fri, 10 Jun 2022 11:55:54 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1347199AbiFJLzw (ORCPT ); Fri, 10 Jun 2022 07:55:52 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:45200 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1347183AbiFJLzt (ORCPT ); Fri, 10 Jun 2022 07:55:49 -0400 Received: from mga18.intel.com (mga18.intel.com [134.134.136.126]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id D5EFD25E for ; Fri, 10 Jun 2022 04:55:40 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1654862140; x=1686398140; h=date:from:to:cc:subject:message-id:mime-version; bh=1aFYvO3gKG91AJpe7s7pE6RHbODPsUTIADYEyMjTuHA=; b=aPtsX7Z+zl7Ry5e6dwzotX6iXNWI2FPoYzXTr+g8DcrGnISzkWcDisjr PjGqaLevagw9S+RDWNJJP+Bb7Bh9HM970aceTzhDU12PWFX0OAM/bqEfD AK5WAzgS+sLNtqKnmTWs1wD4k/pWOkCTLfAO5kA7LEL4YtDcOBzCqs/aj gl+0uezMdP4xDmXtfy/K/FYdLD75qTDVDFexVZpZK9w+CJCwqdFcY4vCq eP3K3Xx3jcOAo2joTFrdGYkDjVl78IYiVZMpV+N3CBcpAqQfnSZSQf9ua yEVavamNzQzYtKhjDdf6bmbM9Wt1GrtpdEsby+ALNmTAjF+SlcN3tiSb0 Q==; X-IronPort-AV: E=McAfee;i="6400,9594,10373"; a="260725116" X-IronPort-AV: E=Sophos;i="5.91,290,1647327600"; d="scan'208";a="260725116" Received: from fmsmga008.fm.intel.com ([10.253.24.58]) by orsmga106.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Jun 2022 04:55:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.91,290,1647327600"; d="scan'208";a="638101204" Received: from lkp-server01.sh.intel.com (HELO 60dabacc1df6) ([10.239.97.150]) by fmsmga008.fm.intel.com with ESMTP; 10 Jun 2022 04:55:39 -0700 Received: from kbuild by 60dabacc1df6 with local (Exim 4.95) (envelope-from ) id 1nzdEo-000Hvh-8Q; Fri, 10 Jun 2022 11:55:38 +0000 Date: Fri, 10 Jun 2022 19:55:25 +0800 From: kernel test robot To: "Kirill A. Shutemov" Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org Subject: [kas:lam 6/8] arch/x86/kernel/process_64.c:745:5: warning: no previous prototype for 'prctl_enable_tagged_addr' Message-ID: <202206101916.IklgUdbQ-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git lam head: 83ba389477b29461f0c926b69deca5eb6f3f5b6a commit: 91934401d053c31ea7851a9e88fa83b9fa5a7bc4 [6/8] x86/mm: Provide ARCH_GET_UNTAG_MASK and ARCH_ENABLE_TAGGED_ADDR config: x86_64-defconfig (https://download.01.org/0day-ci/archive/20220610/202206101916.IklgUdbQ-lkp@intel.com/config) compiler: gcc-11 (Debian 11.3.0-3) 11.3.0 reproduce (this is a W=1 build): # https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git/commit/?id=91934401d053c31ea7851a9e88fa83b9fa5a7bc4 git remote add kas https://git.kernel.org/pub/scm/linux/kernel/git/kas/linux.git git fetch --no-tags kas lam git checkout 91934401d053c31ea7851a9e88fa83b9fa5a7bc4 # save the config file mkdir build_dir && cp config build_dir/.config make W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash arch/x86/kernel/ If you fix the issue, kindly add following tag where applicable Reported-by: kernel test robot All warnings (new ones prefixed by >>): >> arch/x86/kernel/process_64.c:745:5: warning: no previous prototype for 'prctl_enable_tagged_addr' [-Wmissing-prototypes] 745 | int prctl_enable_tagged_addr(unsigned long nr_bits) | ^~~~~~~~~~~~~~~~~~~~~~~~ vim +/prctl_enable_tagged_addr +745 arch/x86/kernel/process_64.c 744 > 745 int prctl_enable_tagged_addr(unsigned long nr_bits) 746 { 747 struct mm_struct *mm = current->mm; 748 749 /* Already enabled? */ 750 if (mm->context.lam_cr3_mask) 751 return -EBUSY; 752 753 /* LAM has to be enabled before spawning threads */ 754 if (get_nr_threads(current) > 1) 755 return -EBUSY; 756 757 if (!nr_bits) { 758 return -EINVAL; 759 } else if (nr_bits <= 6) { 760 mm->context.lam_cr3_mask = X86_CR3_LAM_U57; 761 mm->context.untag_mask = ~GENMASK(62, 57); 762 } else { 763 return -EINVAL; 764 } 765 766 /* Update CR3 to get LAM active */ 767 switch_mm(current->mm, current->mm, current); 768 return 0; 769 } 770 -- 0-DAY CI Kernel Test Service https://01.org/lkp