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=-12.6 required=3.0 tests=BAYES_00,DKIM_INVALID, DKIM_SIGNED,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 ACAF8C4742A for ; Thu, 24 Sep 2020 13:59:33 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 4C79820888 for ; Thu, 24 Sep 2020 13:59:33 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=fail reason="signature verification failed" (2048-bit key) header.d=infradead.org header.i=@infradead.org header.b="Wle5rrsf" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4C79820888 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=lst.de Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 5552B900043; Thu, 24 Sep 2020 09:59:24 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 4DAD6900040; Thu, 24 Sep 2020 09:59:24 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 3F406900042; Thu, 24 Sep 2020 09:59:24 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0195.hostedemail.com [216.40.44.195]) by kanga.kvack.org (Postfix) with ESMTP id 1CA5490003F for ; Thu, 24 Sep 2020 09:59:24 -0400 (EDT) Received: from smtpin22.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id C4DA1363C for ; Thu, 24 Sep 2020 13:59:23 +0000 (UTC) X-FDA: 77298112206.22.chain10_4709cfb2715f Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin22.hostedemail.com (Postfix) with ESMTP id A2E0418038E60 for ; Thu, 24 Sep 2020 13:59:23 +0000 (UTC) X-HE-Tag: chain10_4709cfb2715f X-Filterd-Recvd-Size: 4226 Received: from casper.infradead.org (casper.infradead.org [90.155.50.34]) by imf38.hostedemail.com (Postfix) with ESMTP for ; Thu, 24 Sep 2020 13:59:23 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=infradead.org; s=casper.20170209; h=Content-Transfer-Encoding:MIME-Version: References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From:Sender:Reply-To: Content-Type:Content-ID:Content-Description; bh=DoQjzQarxloGAmnDI67QP4f0cjzIHBlULRPmusZkYFE=; b=Wle5rrsf+RqFWFUJjUE1hZ+CeZ gESFPu3GnpG43g18SN2z5c30lwsCJXPouUI2dOzKKGTOY4iO72QA54PRkRtRNYAMtAhUoVaGNfsAP qEUVsmaPq/JprzOd6dGTNyNyIxR4W5PWejpsei3Uuj82SsW7ET4sYAkFsZRjQBtBqwe799KZw1aha 7G8PNMRi5V1UH0TNGLwrymdthFBu3HqxsMm8Zxzzs3gza4c11P8o1Ap8kM1EVo++DvMZuKLMq1nmo qmJyACVq9ezddAPwb2l/W3GltjZj6sQO1OLZ+iYp/9MgqLxWTTwQx2QmH7Zz8VpZ03Hnv8BGJbsEx kQU0B9/Q==; Received: from p4fdb0c34.dip0.t-ipconnect.de ([79.219.12.52] helo=localhost) by casper.infradead.org with esmtpsa (Exim 4.92.3 #3 (Red Hat Linux)) id 1kLRm7-0003xB-62; Thu, 24 Sep 2020 13:59:07 +0000 From: Christoph Hellwig To: Andrew Morton Cc: Peter Zijlstra , Boris Ostrovsky , Juergen Gross , Stefano Stabellini , Jani Nikula , Joonas Lahtinen , Tvrtko Ursulin , Chris Wilson , Matthew Auld , Rodrigo Vivi , Minchan Kim , Matthew Wilcox , Nitin Gupta , x86@kernel.org, xen-devel@lists.xenproject.org, linux-kernel@vger.kernel.org, intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org, linux-mm@kvack.org Subject: [PATCH 10/11] x86/xen: open code alloc_vm_area in arch_gnttab_valloc Date: Thu, 24 Sep 2020 15:58:52 +0200 Message-Id: <20200924135853.875294-11-hch@lst.de> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20200924135853.875294-1-hch@lst.de> References: <20200924135853.875294-1-hch@lst.de> MIME-Version: 1.0 X-SRS-Rewrite: SMTP reverse-path rewritten from by casper.infradead.org. See http://www.infradead.org/rpr.html Content-Transfer-Encoding: quoted-printable X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: Replace the last call to alloc_vm_area with an open coded version using an iterator in struct gnttab_vm_area instead of the triple indirection magic in alloc_vm_area. Signed-off-by: Christoph Hellwig --- arch/x86/xen/grant-table.c | 27 ++++++++++++++++++++------- 1 file changed, 20 insertions(+), 7 deletions(-) diff --git a/arch/x86/xen/grant-table.c b/arch/x86/xen/grant-table.c index 4988e19598c8a5..1e681bf62561a0 100644 --- a/arch/x86/xen/grant-table.c +++ b/arch/x86/xen/grant-table.c @@ -25,6 +25,7 @@ static struct gnttab_vm_area { struct vm_struct *area; pte_t **ptes; + int idx; } gnttab_shared_vm_area, gnttab_status_vm_area; =20 int arch_gnttab_map_shared(unsigned long *frames, unsigned long nr_gfram= es, @@ -90,19 +91,31 @@ void arch_gnttab_unmap(void *shared, unsigned long nr= _gframes) } } =20 +static int gnttab_apply(pte_t *pte, unsigned long addr, void *data) +{ + struct gnttab_vm_area *area =3D data; + + area->ptes[area->idx++] =3D pte; + return 0; +} + static int arch_gnttab_valloc(struct gnttab_vm_area *area, unsigned nr_f= rames) { area->ptes =3D kmalloc_array(nr_frames, sizeof(*area->ptes), GFP_KERNEL= ); if (area->ptes =3D=3D NULL) return -ENOMEM; - - area->area =3D alloc_vm_area(PAGE_SIZE * nr_frames, area->ptes); - if (area->area =3D=3D NULL) { - kfree(area->ptes); - return -ENOMEM; - } - + area->area =3D get_vm_area(PAGE_SIZE * nr_frames, VM_IOREMAP); + if (!area->area) + goto out_free_ptes; + if (apply_to_page_range(&init_mm, (unsigned long)area->area->addr, + PAGE_SIZE * nr_frames, gnttab_apply, area)) + goto out_free_vm_area; return 0; +out_free_vm_area: + free_vm_area(area->area); +out_free_ptes: + kfree(area->ptes); + return -ENOMEM; } =20 static void arch_gnttab_vfree(struct gnttab_vm_area *area) --=20 2.28.0