From patchwork Tue Jun 29 02:39:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 12349099 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 41AE3C11F64 for ; Tue, 29 Jun 2021 02:39:14 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id DC7C561D0C for ; Tue, 29 Jun 2021 02:39:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DC7C561D0C 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 4023F8D00E5; Mon, 28 Jun 2021 22:39:13 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id 3D8D18D008F; Mon, 28 Jun 2021 22:39:13 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 2A0EB8D00E5; Mon, 28 Jun 2021 22:39:13 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0116.hostedemail.com [216.40.44.116]) by kanga.kvack.org (Postfix) with ESMTP id 07BA08D008F for ; Mon, 28 Jun 2021 22:39:12 -0400 (EDT) Received: from smtpin40.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay02.hostedemail.com (Postfix) with ESMTP id 06AD51F858 for ; Tue, 29 Jun 2021 02:39:13 +0000 (UTC) X-FDA: 78305204586.40.B75DB3F Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf15.hostedemail.com (Postfix) with ESMTP id AC9D3A0010D2 for ; Tue, 29 Jun 2021 02:39:12 +0000 (UTC) Received: by mail.kernel.org (Postfix) with ESMTPSA id B7EC461D08; Tue, 29 Jun 2021 02:39:11 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1624934352; bh=ZQdyrP5Xw5lVQICMHU1juDlPd/tNAfxTL2m+vVJ7ur4=; h=Date:From:To:Subject:In-Reply-To:From; b=Kx8qMF1cnxlM5ZeqAV8aAT6QoEZV3SVhYLD+FF9PoZpMFDUqSqebVc/qxFy9PBvKm DSYuCgYU7RA3M0K8uaV36A4XQ26KxJws8qF5uaQ8mf6e4ufERZnduLTLS3/S4wvcXY HIrhqNozf/xjD3IR727DTQ76kB+Ayns2bBk4w8qM= Date: Mon, 28 Jun 2021 19:39:11 -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 112/192] arch/m68k/kernel/sys_m68k: use vma_lookup() in sys_cacheflush() Message-ID: <20210629023911.Oo4EVosUL%akpm@linux-foundation.org> In-Reply-To: <20210628193256.008961950a714730751c1423@linux-foundation.org> User-Agent: s-nail v14.8.16 Authentication-Results: imf15.hostedemail.com; dkim=pass header.d=linux-foundation.org header.s=korg header.b=Kx8qMF1c; spf=pass (imf15.hostedemail.com: domain of akpm@linux-foundation.org designates 198.145.29.99 as permitted sender) smtp.mailfrom=akpm@linux-foundation.org; dmarc=none X-Stat-Signature: coiz6ysc7t9ft19nz4ruos4rgtc3ofg7 X-Rspamd-Queue-Id: AC9D3A0010D2 X-Rspamd-Server: rspam06 X-HE-Tag: 1624934352-146064 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: arch/m68k/kernel/sys_m68k: use vma_lookup() in sys_cacheflush() 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/20210521174745.2219620-9-Liam.Howlett@Oracle.com Signed-off-by: Liam R. Howlett Reviewed-by: Laurent Dufour Acked-by: David Hildenbrand Acked-by: Davidlohr Bueso Acked-by: Geert Uytterhoeven Signed-off-by: Andrew Morton --- arch/m68k/kernel/sys_m68k.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/arch/m68k/kernel/sys_m68k.c~arch-m68k-kernel-sys_m68k-use-vma_lookup-in-sys_cacheflush +++ a/arch/m68k/kernel/sys_m68k.c @@ -402,8 +402,8 @@ sys_cacheflush (unsigned long addr, int * to this process. */ mmap_read_lock(current->mm); - vma = find_vma(current->mm, addr); - if (!vma || addr < vma->vm_start || addr + len > vma->vm_end) + vma = vma_lookup(current->mm, addr); + if (!vma || addr + len > vma->vm_end) goto out_unlock; }