From patchwork Tue Jun 29 02:39:44 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 12349121 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=-15.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS 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 EA664C11F65 for ; Tue, 29 Jun 2021 02:39:46 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id BB46561C71 for ; Tue, 29 Jun 2021 02:39:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org BB46561C71 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 1DE8A8D008F; Mon, 28 Jun 2021 22:39:46 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 1B5018D00F0; Mon, 28 Jun 2021 22:39:46 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 08A6C8D008F; Mon, 28 Jun 2021 22:39:46 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0248.hostedemail.com [216.40.44.248]) by kanga.kvack.org (Postfix) with ESMTP id D92C58D008F for ; Mon, 28 Jun 2021 22:39:45 -0400 (EDT) Received: from smtpin21.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id D9805180ACEF3 for ; Tue, 29 Jun 2021 02:39:45 +0000 (UTC) X-FDA: 78305205930.21.81381B2 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf12.hostedemail.com (Postfix) with ESMTP id 958F034B for ; Tue, 29 Jun 2021 02:39:45 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id 8FF4E611AE; Tue, 29 Jun 2021 02:39:44 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1624934384; bh=Zs4cXnzl2r4kx29LCbxI+KYURv3vdZjWz0dw3Ndf3Zc=; h=Date:From:To:Subject:In-Reply-To:From; b=HRsGUphe6oFyxZuAybEvxvyyk1ZlBUlU+bs5i7YjaQwIb5xYnCkaLZG6Z7b8Ao/iL IMxxg/MTSpm1tNnCFdVOEIZMpzR9xVd7TbGvTtP0E1nLDKFcZlTCht93ybX39uPC14 gSD3VWHJsaTTFrHKD+KWILHrvYzLkzAv0lS9uhrw= Date: Mon, 28 Jun 2021 19:39:44 -0700 From: Andrew Morton To: akpm@linux-foundation.org, david@redhat.com, dbueso@suse.de, geert@linux-m68k.org, ldufour@linux.ibm.com, Liam.Howlett@Oracle.com, linux-mm@kvack.org, mm-commits@vger.kernel.org, torvalds@linux-foundation.org Subject: [patch 123/192] mm/migrate: use vma_lookup() in do_pages_stat_array() Message-ID: <20210629023944.vnHowaGtj%akpm@linux-foundation.org> In-Reply-To: <20210628193256.008961950a714730751c1423@linux-foundation.org> User-Agent: s-nail v14.8.16 Authentication-Results: imf12.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=HRsGUphe; dmarc=none; spf=pass (imf12.hostedemail.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org X-Stat-Signature: scc9y4384eyownb6onwdeuwpahr5y1qx X-Rspamd-Server: rspam04 X-Rspamd-Queue-Id: 958F034B X-HE-Tag: 1624934385-140212 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: From: Liam Howlett Subject: mm/migrate: use vma_lookup() in do_pages_stat_array() Use vma_lookup() to find the VMA at a specific address. As vma_lookup() will return NULL if the address is not within any VMA, the start address no longer needs to be validated. Link: https://lkml.kernel.org/r/20210521174745.2219620-20-Liam.Howlett@Oracle.com Signed-off-by: Liam R. Howlett Reviewed-by: Laurent Dufour Acked-by: David Hildenbrand Acked-by: Davidlohr Bueso Cc: Geert Uytterhoeven Signed-off-by: Andrew Morton --- mm/migrate.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/migrate.c~mm-migrate-use-vma_lookup-in-do_pages_stat_array +++ a/mm/migrate.c @@ -1834,8 +1834,8 @@ static void do_pages_stat_array(struct m struct page *page; int err = -EFAULT; - vma = find_vma(mm, addr); - if (!vma || addr < vma->vm_start) + vma = vma_lookup(mm, addr); + if (!vma) goto set_status; /* FOLL_DUMP to ignore special (like zero) pages */