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 58895C433E6 for ; Tue, 12 Jan 2021 16:19:05 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 1C5EF2222B for ; Tue, 12 Jan 2021 16:19:05 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S2406205AbhALQQk (ORCPT ); Tue, 12 Jan 2021 11:16:40 -0500 Received: from aserp2130.oracle.com ([141.146.126.79]:56692 "EHLO aserp2130.oracle.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S2406165AbhALQQg (ORCPT ); Tue, 12 Jan 2021 11:16:36 -0500 Received: from pps.filterd (aserp2130.oracle.com [127.0.0.1]) by aserp2130.oracle.com (8.16.0.42/8.16.0.42) with SMTP id 10CGFWGp107453; Tue, 12 Jan 2021 16:15:35 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=8yKu1sYv1pdl7SnJ+zE3wb3ksswtV7ERGy5zCO1jLH0=; b=G+sKjBL4Vo8Zvbo8c6trzR6fzeofzui+yl2jXF9l2zv6tPQ+DCR1822/ZxB+tlJruQQm E77r2DeSF2JxTyLk+NSMSmEQMQrD6MRRA7DDbXuF64cMNHq9Zk44fs0boEWvFFjiILyU Y4TMjyh3wpO75VH2rSzpTWBscf0YrIuRhSspOUq9L/mh1K5rKENBqneTyWUEs+zpgPe1 g27hdH4geGw0PmJHztVNdlXaANQi6B80VC5YpDqvQxz37IfPtNk9ev7yJLRcItsi4YVy Xmg1WPbKtuoS4/mIdBAx5zwfL0eKVrX7dAFq1Z4qkEsvPi+x+pkWv4Cml1WAPguxyTWa 3A== Received: from aserp3020.oracle.com (aserp3020.oracle.com [141.146.126.70]) by aserp2130.oracle.com with ESMTP id 360kg1q576-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 12 Jan 2021 16:15:35 +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 10CGBZsZ142917; Tue, 12 Jan 2021 16:13:35 GMT Received: from userv0122.oracle.com (userv0122.oracle.com [156.151.31.75]) by aserp3020.oracle.com with ESMTP id 360ke6rgqn-1 (version=TLSv1.2 cipher=ECDHE-RSA-AES256-GCM-SHA384 bits=256 verify=OK); Tue, 12 Jan 2021 16:13:34 +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 10CGDXbg030055; Tue, 12 Jan 2021 16:13:33 GMT Received: from revolver.jebus.ca (/23.233.25.87) by default (Oracle Beehive Gateway v4.0) with ESMTP ; Tue, 12 Jan 2021 08:13:32 -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 24/70] mmap: Remove __do_munmap() in favour of do_mas_munmap() Date: Tue, 12 Jan 2021 11:11:54 -0500 Message-Id: <20210112161240.2024684-25-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=996 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 malwarescore=0 suspectscore=0 clxscore=1015 impostorscore=0 spamscore=0 priorityscore=1501 mlxscore=0 phishscore=0 mlxlogscore=999 bulkscore=0 adultscore=0 lowpriorityscore=0 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 Export new interface and use it in place of old interface. Signed-off-by: Liam R. Howlett --- include/linux/mm.h | 4 ++-- mm/mmap.c | 16 ++++------------ mm/mremap.c | 7 ++++--- 3 files changed, 10 insertions(+), 17 deletions(-) diff --git a/include/linux/mm.h b/include/linux/mm.h index 996353a057500..680dcfe07dbb6 100644 --- a/include/linux/mm.h +++ b/include/linux/mm.h @@ -2573,8 +2573,8 @@ extern unsigned long mmap_region(struct file *file, unsigned long addr, extern unsigned long do_mmap(struct file *file, unsigned long addr, unsigned long len, unsigned long prot, unsigned long flags, unsigned long pgoff, unsigned long *populate, struct list_head *uf); -extern int __do_munmap(struct mm_struct *, unsigned long, size_t, - struct list_head *uf, bool downgrade); +extern int do_mas_munmap(struct ma_state *mas, struct mm_struct *mm, + unsigned long start, size_t len, struct list_head *uf, bool downgrade); extern int do_munmap(struct mm_struct *, unsigned long, size_t, struct list_head *uf); extern int do_madvise(struct mm_struct *mm, unsigned long start, size_t len_in, int behavior); diff --git a/mm/mmap.c b/mm/mmap.c index c0a64c4726b67..9be91b47db6b4 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -2555,13 +2555,6 @@ int do_mas_align_munmap(struct ma_state *mas, struct vm_area_struct *vma, return downgrade ? 1 : 0; } -int __do_munmap(struct mm_struct *mm, unsigned long start, size_t len, - struct list_head *uf, bool downgrade) -{ - MA_STATE(mas, &mm->mm_mt, start, start); - return do_mas_munmap(&mas, mm, start, len, uf, downgrade); -} - /* * do_mas_munmap() - munmap a given range. * @mas: The maple state @@ -2610,7 +2603,8 @@ int do_mas_munmap(struct ma_state *mas, struct mm_struct *mm, int do_munmap(struct mm_struct *mm, unsigned long start, size_t len, struct list_head *uf) { - return __do_munmap(mm, start, len, uf, false); + MA_STATE(mas, &mm->mm_mt, start, start); + return do_mas_munmap(&mas, mm, start, len, uf, false); } unsigned long mmap_region(struct file *file, unsigned long addr, @@ -2858,11 +2852,12 @@ static int __vm_munmap(unsigned long start, size_t len, bool downgrade) int ret; struct mm_struct *mm = current->mm; LIST_HEAD(uf); + MA_STATE(mas, &mm->mm_mt, start, start); if (mmap_write_lock_killable(mm)) return -EINTR; - ret = __do_munmap(mm, start, len, &uf, downgrade); + ret = do_mas_munmap(&mas, mm, start, len, &uf, downgrade); /* * Returning 1 indicates mmap_lock is downgraded. * But 1 is not legal return value of vm_munmap() and munmap(), reset @@ -3014,9 +3009,6 @@ static int do_brk_munmap(struct ma_state *mas, struct vm_area_struct *vma, arch_unmap(mm, newbrk, oldbrk); if (likely(vma->vm_start >= newbrk)) { // remove entire mapping(s) - mas_set(mas, newbrk); - if (vma->vm_start != newbrk) - mas_reset(mas); // cause a re-walk for the first overlap. ret = do_mas_munmap(mas, mm, newbrk, oldbrk-newbrk, uf, true); goto munmap_full_vma; } diff --git a/mm/mremap.c b/mm/mremap.c index 138abbae4f758..a7526a8c1fe5a 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -723,14 +723,15 @@ SYSCALL_DEFINE5(mremap, unsigned long, addr, unsigned long, old_len, /* * Always allow a shrinking remap: that just unmaps * the unnecessary pages.. - * __do_munmap does all the needed commit accounting, and + * do_mas_munmap does all the needed commit accounting, and * downgrades mmap_lock to read if so directed. */ if (old_len >= new_len) { int retval; + MA_STATE(mas, &mm->mm_mt, addr + new_len, addr + new_len); - retval = __do_munmap(mm, addr+new_len, old_len - new_len, - &uf_unmap, true); + retval = do_mas_munmap(&mas, mm, addr + new_len, + old_len - new_len, &uf_unmap, true); if (retval < 0 && old_len != new_len) { ret = retval; goto out; -- 2.28.0