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 X-Spam-Level: X-Spam-Status: No, score=-9.8 required=3.0 tests=HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS, USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 80E99C432C0 for ; Mon, 25 Nov 2019 19:31:16 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 63AE820678 for ; Mon, 25 Nov 2019 19:31:16 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726985AbfKYTbP (ORCPT ); Mon, 25 Nov 2019 14:31:15 -0500 Received: from mga12.intel.com ([192.55.52.136]:22629 "EHLO mga12.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1725823AbfKYTbN (ORCPT ); Mon, 25 Nov 2019 14:31:13 -0500 X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by fmsmga106.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 25 Nov 2019 11:31:11 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.69,242,1571727600"; d="scan'208";a="216994579" Received: from romley-ivt3.sc.intel.com ([172.25.110.60]) by fmsmga001.fm.intel.com with ESMTP; 25 Nov 2019 11:31:11 -0800 From: Fenghua Yu To: "Thomas Gleixner" , "Ingo Molnar" , "Borislav Petkov" , "H Peter Anvin" , "Andy Lutomirski" , "Peter Zijlstra" , "David Laight" , "Ashok Raj" , "Tony Luck" , "Ravi V Shankar" Cc: "linux-kernel" , "x86" , Fenghua Yu Subject: [PATCH v2 2/4] xen-pcifront: Align address of flags to size of unsigned long Date: Mon, 25 Nov 2019 11:43:02 -0800 Message-Id: <1574710984-208305-3-git-send-email-fenghua.yu@intel.com> X-Mailer: git-send-email 2.5.0 In-Reply-To: <1574710984-208305-1-git-send-email-fenghua.yu@intel.com> References: <1574710984-208305-1-git-send-email-fenghua.yu@intel.com> Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org The address of "flags" is passed to atomic bitops which require the address is aligned to size of unsigned long. Signed-off-by: Fenghua Yu --- include/xen/interface/io/pciif.h | 7 +++++-- 1 file changed, 5 insertions(+), 2 deletions(-) diff --git a/include/xen/interface/io/pciif.h b/include/xen/interface/io/pciif.h index d9922ae36eb5..639d5fb484a3 100644 --- a/include/xen/interface/io/pciif.h +++ b/include/xen/interface/io/pciif.h @@ -103,8 +103,11 @@ struct xen_pcie_aer_op { uint32_t devfn; }; struct xen_pci_sharedinfo { - /* flags - XEN_PCIF_* */ - uint32_t flags; + /* flags - XEN_PCIF_*. Force alignment for atomic bit operations. */ + union { + uint32_t flags; + unsigned long flags_alignment; + }; struct xen_pci_op op; struct xen_pcie_aer_op aer_op; }; -- 2.19.1