From patchwork Thu Dec 7 11:11:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Nicola Vetrini X-Patchwork-Id: 13483160 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 lists.xenproject.org (lists.xenproject.org [192.237.175.120]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by smtp.lore.kernel.org (Postfix) with ESMTPS id 4A1BDC10DCE for ; Thu, 7 Dec 2023 11:11:37 +0000 (UTC) Received: from list by lists.xenproject.org with outflank-mailman.649780.1014690 (Exim 4.92) (envelope-from ) id 1rBCHu-0005rH-Mh; Thu, 07 Dec 2023 11:11:26 +0000 X-Outflank-Mailman: Message body and most headers restored to incoming version Received: by outflank-mailman (output) from mailman id 649780.1014690; Thu, 07 Dec 2023 11:11:26 +0000 Received: from localhost ([127.0.0.1] helo=lists.xenproject.org) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1rBCHu-0005qG-HJ; Thu, 07 Dec 2023 11:11:26 +0000 Received: by outflank-mailman (input) for mailman id 649780; Thu, 07 Dec 2023 11:11:25 +0000 Received: from se1-gles-sth1-in.inumbo.com ([159.253.27.254] helo=se1-gles-sth1.inumbo.com) by lists.xenproject.org with esmtp (Exim 4.92) (envelope-from ) id 1rBCHs-0005Ik-Sz for xen-devel@lists.xenproject.org; Thu, 07 Dec 2023 11:11:24 +0000 Received: from support.bugseng.com (mail.bugseng.com [162.55.131.47]) by se1-gles-sth1.inumbo.com (Halon) with ESMTPS id 5b50b8da-94f1-11ee-98e7-6d05b1d4d9a1; Thu, 07 Dec 2023 12:11:23 +0100 (CET) Received: from nico.bugseng.com (unknown [147.123.100.131]) by support.bugseng.com (Postfix) with ESMTPSA id E2E3E4EE0741; Thu, 7 Dec 2023 12:11:22 +0100 (CET) X-BeenThere: xen-devel@lists.xenproject.org List-Id: Xen developer discussion List-Unsubscribe: , List-Post: List-Help: List-Subscribe: , Errors-To: xen-devel-bounces@lists.xenproject.org Precedence: list Sender: "Xen-devel" X-Inumbo-ID: 5b50b8da-94f1-11ee-98e7-6d05b1d4d9a1 From: Nicola Vetrini To: xen-devel@lists.xenproject.org Cc: consulting@bugseng.com, Nicola Vetrini , Andrew Cooper , George Dunlap , Jan Beulich , Julien Grall , Stefano Stabellini , Wei Liu Subject: [XEN PATCH v2 3/3] xen/mm: add declaration for first_valid_mfn Date: Thu, 7 Dec 2023 12:11:18 +0100 Message-Id: <2c02524be7d02064fdf2f5003ef1c507034e4437.1701947290.git.nicola.vetrini@bugseng.com> X-Mailer: git-send-email 2.34.1 In-Reply-To: References: MIME-Version: 1.0 Such declaration is needed to comply with MISRA C Rule 8.4, because a compatible declaration is not visible in xen/common/page_alloc.c, where the variable is defined. That variable can't yet be static because of the lack of support from ARM and PPC for NUMA. No functional change. Signed-off-by: Nicola Vetrini --- Having this declaration essentially sidesteps the current impossibility of having a static variable, as described in the comments in ARM and PCC's asm/numa.h. --- xen/include/xen/mm.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/xen/include/xen/mm.h b/xen/include/xen/mm.h index 3d9b2d05a5c8..a13a9a46ced7 100644 --- a/xen/include/xen/mm.h +++ b/xen/include/xen/mm.h @@ -118,6 +118,8 @@ int destroy_xen_mappings(unsigned long s, unsigned long e); /* Retrieve the MFN mapped by VA in Xen virtual address space. */ mfn_t xen_map_to_mfn(unsigned long va); +extern mfn_t first_valid_mfn; + /* * Create only non-leaf page table entries for the * page range in Xen virtual address space.