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 A202DC433EF for ; Fri, 11 Mar 2022 23:01:02 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229966AbiCKXCE (ORCPT ); Fri, 11 Mar 2022 18:02:04 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:51104 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230114AbiCKXBr (ORCPT ); Fri, 11 Mar 2022 18:01:47 -0500 Received: from mga12.intel.com (mga12.intel.com [192.55.52.136]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 6409A24DD60 for ; Fri, 11 Mar 2022 14:54:58 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1647039298; x=1678575298; h=date:from:to:cc:subject:message-id:mime-version; bh=eKBtcpoHrPqlKqhYnJeiJbBZO+7HypJb6qXhbR6fhOA=; b=BE+Y2Q3sDaMDsHHuAkmZfaCAFIBAOp+dOMnTRLJUVT2ReZiUPxaMuPEm Op+/sBGvIridRm6qYNRb2mFq532vu9aHEJqJKTlZF3d1JMHIOorD3HTxp zAbdELs8nY5Czb+3Su2v0xXd17BNsJyZX1kNpGya8yOwmzHb5VUjJ++Gm /2ygUrFYcfIo9XMh/4RRdqYn9jQBX/4S9CgQfwGnAT711qO+A6s7VQrLC hNAGlo92R1ljkZWOWIPPO3UVSdeQpPRMo5S1/8Co7VooKiKacWpWf8AvR uWdLMTI6sltsfg4KF1Y3Llhmei7Qk4peobfy99G8Vsx3LMscj4JEATC44 A==; X-IronPort-AV: E=McAfee;i="6200,9189,10283"; a="235620724" X-IronPort-AV: E=Sophos;i="5.90,175,1643702400"; d="scan'208";a="235620724" Received: from orsmga005.jf.intel.com ([10.7.209.41]) by fmsmga106.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 11 Mar 2022 14:54:57 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.90,175,1643702400"; d="scan'208";a="712995916" Received: from lkp-server02.sh.intel.com (HELO 89b41b6ae01c) ([10.239.97.151]) by orsmga005.jf.intel.com with ESMTP; 11 Mar 2022 14:54:54 -0800 Received: from kbuild by 89b41b6ae01c with local (Exim 4.92) (envelope-from ) id 1nSo9u-0007DK-05; Fri, 11 Mar 2022 22:54:54 +0000 Date: Sat, 12 Mar 2022 06:54:50 +0800 From: kernel test robot To: Pavel Tatashin Cc: kbuild-all@lists.01.org, linux-kernel@vger.kernel.org, Will Deacon , Matthias Brugger Subject: arch/arm64/kernel/hibernate.c:202:44: sparse: sparse: cast from restricted gfp_t Message-ID: <202203120653.S3Am11od-lkp@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline User-Agent: Mutt/1.10.1 (2018-07-13) Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 68453767131a5deec1e8f9ac92a9042f929e585d commit: 50f53fb721817a6efa541cca24f1b7caa84801c1 arm64: trans_pgd: make trans_pgd_map_page generic date: 1 year, 1 month ago config: arm64-allmodconfig (https://download.01.org/0day-ci/archive/20220312/202203120653.S3Am11od-lkp@intel.com/config) compiler: aarch64-linux-gcc (GCC) 11.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # apt-get install sparse # sparse version: v0.6.4-dirty # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=50f53fb721817a6efa541cca24f1b7caa84801c1 git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git git fetch --no-tags linus master git checkout 50f53fb721817a6efa541cca24f1b7caa84801c1 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' O=build_dir ARCH=arm64 SHELL=/bin/bash arch/arm64/kernel/ If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot sparse warnings: (new ones prefixed by >>) arch/arm64/kernel/hibernate.c:181:39: sparse: sparse: cast to restricted gfp_t >> arch/arm64/kernel/hibernate.c:202:44: sparse: sparse: cast from restricted gfp_t vim +202 arch/arm64/kernel/hibernate.c 183 184 /* 185 * Copies length bytes, starting at src_start into an new page, 186 * perform cache maintenance, then maps it at the specified address low 187 * address as executable. 188 * 189 * This is used by hibernate to copy the code it needs to execute when 190 * overwriting the kernel text. This function generates a new set of page 191 * tables, which it loads into ttbr0. 192 * 193 * Length is provided as we probably only want 4K of data, even on a 64K 194 * page system. 195 */ 196 static int create_safe_exec_page(void *src_start, size_t length, 197 unsigned long dst_addr, 198 phys_addr_t *phys_dst_addr) 199 { 200 struct trans_pgd_info trans_info = { 201 .trans_alloc_page = hibernate_page_alloc, > 202 .trans_alloc_arg = (void *)GFP_ATOMIC, 203 }; 204 205 void *page = (void *)get_safe_page(GFP_ATOMIC); 206 pgd_t *trans_pgd; 207 int rc; 208 209 if (!page) 210 return -ENOMEM; 211 212 memcpy(page, src_start, length); 213 __flush_icache_range((unsigned long)page, (unsigned long)page + length); 214 215 trans_pgd = (void *)get_safe_page(GFP_ATOMIC); 216 if (!trans_pgd) 217 return -ENOMEM; 218 219 rc = trans_pgd_map_page(&trans_info, trans_pgd, page, dst_addr, 220 PAGE_KERNEL_EXEC); 221 if (rc) 222 return rc; 223 224 /* 225 * Load our new page tables. A strict BBM approach requires that we 226 * ensure that TLBs are free of any entries that may overlap with the 227 * global mappings we are about to install. 228 * 229 * For a real hibernate/resume cycle TTBR0 currently points to a zero 230 * page, but TLBs may contain stale ASID-tagged entries (e.g. for EFI 231 * runtime services), while for a userspace-driven test_resume cycle it 232 * points to userspace page tables (and we must point it at a zero page 233 * ourselves). Elsewhere we only (un)install the idmap with preemption 234 * disabled, so T0SZ should be as required regardless. 235 */ 236 cpu_set_reserved_ttbr0(); 237 local_flush_tlb_all(); 238 write_sysreg(phys_to_ttbr(virt_to_phys(trans_pgd)), ttbr0_el1); 239 isb(); 240 241 *phys_dst_addr = virt_to_phys(page); 242 243 return 0; 244 } 245 --- 0-DAY CI Kernel Test Service https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org