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=-19.0 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, UNPARSEABLE_RELAY,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 B559EC4332D for ; Tue, 12 Jan 2021 16:18:04 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7D6942222F for ; Tue, 12 Jan 2021 16:18:04 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406424AbhALQRl (ORCPT ); Tue, 12 Jan 2021 11:17:41 -0500 Received: from aserp2120.oracle.com ([141.146.126.78]:37680 "EHLO aserp2120.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2406355AbhALQR2 (ORCPT ); Tue, 12 Jan 2021 11:17:28 -0500 Received: from pps.filterd (aserp2120.oracle.com [127.0.0.1]) by aserp2120.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 10CGDmah162423; Tue, 12 Jan 2021 16:16:31 GMT DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=oracle.com; h=from : to : cc : subject : date : message-id : in-reply-to : references : mime-version : content-transfer-encoding; s=corp-2020-01-29; bh=ag0OboaKwJiod+HfP6HsLvol3F/ZvYOkZp32m0fdIfA=; b=xGH09AU3d9OmHhHF8066c1l4n0gJb1zsLZDzuG0IPsdI62DmBAU66bTkMoIHOzojyjAY gr977AXBnEXPI3IYDwqBNqcgOz5Vet5llCDWmN/f3QKjc3qtpAI9UAyaSP64gYixjy8N kU/UlubunkVs0iT/Xrc7j0UqoRl9p/Lvx39KZ8S0iBRrb+ERoILossszjeDYHYfmlXcI He0agMWNzrJ0Ome8P3ezptkVPF0pWNfdmAs9tB1rF2rtrtaOjL3DCcKuCV3ONJXzCztD LqG373a+ZRJrlRJKkH77akQEaWHdbL1aT6Or6kkR69kBb/lmS6AO3TnGPTIhgmrjCSTy bw== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by aserp2120.oracle.com with ESMTP id 360kcyq5yf-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 12 Jan 2021 16:16:31 +0000 Received: from pps.filterd (aserp3020.oracle.com [127.0.0.1]) by aserp3020.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 10CGBYqf142775; Tue, 12 Jan 2021 16:14:31 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserp3020.oracle.com with ESMTP id 360ke6rjex-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 12 Jan 2021 16:14:31 +0000 Received: from abhmp0012.oracle.com (abhmp0012.oracle.com [141.146.116.18]) by userv0122.oracle.com (8.14.4/8.14.4) with ESMTP id 10CGETQe030651; Tue, 12 Jan 2021 16:14:29 GMT Received: from revolver.jebus.ca (/23.233.25.87) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 12 Jan 2021 08:14:29 -0800 From: "Liam R. Howlett" To: maple-tree@lists.infradead.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: Andrew Morton , Song Liu , Davidlohr Bueso , "Paul E . McKenney" , Matthew Wilcox , Jerome Glisse , David Rientjes , Axel Rasmussen , Suren Baghdasaryan , Vlastimil Babka , Rik van Riel , Peter Zijlstra Subject: [PATCH v2 60/70] mm/mprotect: Use maple tree navigation instead of vma linked list Date: Tue, 12 Jan 2021 11:12:30 -0500 Message-Id: <20210112161240.2024684-61-Liam.Howlett@Oracle.com> X-Mailer: git-send-email 2.28.0 In-Reply-To: <20210112161240.2024684-1-Liam.Howlett@Oracle.com> References: <20210112161240.2024684-1-Liam.Howlett@Oracle.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9862 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 adultscore=0 suspectscore=0 spamscore=0 mlxlogscore=999 malwarescore=0 bulkscore=0 mlxscore=0 phishscore=0 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101120092 X-Proofpoint-Virus-Version: vendor=nai engine=6000 definitions=9862 signatures=668683 X-Proofpoint-Spam-Details: rule=notspam policy=default score=0 spamscore=0 phishscore=0 impostorscore=0 bulkscore=0 adultscore=0 suspectscore=0 malwarescore=0 lowpriorityscore=0 clxscore=1015 mlxlogscore=999 mlxscore=0 priorityscore=1501 classifier=spam adjust=0 reason=mlx scancount=1 engine=8.12.0-2009150000 definitions=main-2101120093 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Signed-off-by: Liam R. Howlett --- mm/mprotect.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/mm/mprotect.c b/mm/mprotect.c index 56c02beb60414..a6208b872336e 100644 --- a/mm/mprotect.c +++ b/mm/mprotect.c @@ -518,6 +518,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len, const int grows = prot & (PROT_GROWSDOWN|PROT_GROWSUP); const bool rier = (current->personality & READ_IMPLIES_EXEC) && (prot & PROT_READ); + MA_STATE(mas, ¤t->mm->mm_mt, start, start); start = untagged_addr(start); @@ -549,11 +550,12 @@ static int do_mprotect_pkey(unsigned long start, size_t len, if ((pkey != -1) && !mm_pkey_is_allocated(current->mm, pkey)) goto out; - vma = find_vma(current->mm, start); + mas_set(&mas, start); + vma = mas_walk(&mas); error = -ENOMEM; if (!vma) goto out; - prev = vma->vm_prev; + prev = mas_prev(&mas, 0); if (unlikely(grows & PROT_GROWSDOWN)) { if (vma->vm_start >= end) goto out; @@ -626,7 +628,7 @@ static int do_mprotect_pkey(unsigned long start, size_t len, if (nstart >= end) goto out; - vma = prev->vm_next; + vma = mas_next(&mas, ULONG_MAX); if (!vma || vma->vm_start != nstart) { error = -ENOMEM; goto out; -- 2.28.0