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=-13.0 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, 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 8F105C433DF for ; Sun, 9 Aug 2020 23:21:10 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 76CD420709 for ; Sun, 9 Aug 2020 23:21:10 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726464AbgHIXVJ (ORCPT ); Sun, 9 Aug 2020 19:21:09 -0400 Received: from out30-43.freemail.mail.aliyun.com ([115.124.30.43]:50292 "EHLO out30-43.freemail.mail.aliyun.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726217AbgHIXVG (ORCPT ); Sun, 9 Aug 2020 19:21:06 -0400 X-Alimail-AntiSpam: AC=PASS;BC=-1|-1;BR=01201311R111e4;CH=green;DM=||false|;DS=||;FP=0|-1|-1|-1|0|-1|-1|-1;HT=e01e01422;MF=richard.weiyang@linux.alibaba.com;NM=1;PH=DS;RN=4;SR=0;TI=SMTPD_---0U5EYrKz_1597015263; Received: from localhost(mailfrom:richard.weiyang@linux.alibaba.com fp:SMTPD_---0U5EYrKz_1597015263) by smtp.aliyun-inc.com(127.0.0.1); Mon, 10 Aug 2020 07:21:03 +0800 From: Wei Yang To: akpm@linux-foundation.org Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Wei Yang Subject: [PATCH 2/2] mm/mmap: leverage vma_rb_erase_ignore() to implement vma_rb_erase() Date: Mon, 10 Aug 2020 07:20:57 +0800 Message-Id: <20200809232057.23477-2-richard.weiyang@linux.alibaba.com> X-Mailer: git-send-email 2.20.1 (Apple Git-117) In-Reply-To: <20200809232057.23477-1-richard.weiyang@linux.alibaba.com> References: <20200809232057.23477-1-richard.weiyang@linux.alibaba.com> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org These two functions share the same logic except ignore a different vma. Let's reuse the code. Signed-off-by: Wei Yang --- mm/mmap.c | 16 +++++++--------- 1 file changed, 7 insertions(+), 9 deletions(-) diff --git a/mm/mmap.c b/mm/mmap.c index ec780925da94..90b1298d4222 100644 --- a/mm/mmap.c +++ b/mm/mmap.c @@ -474,8 +474,12 @@ static __always_inline void vma_rb_erase_ignore(struct vm_area_struct *vma, { /* * All rb_subtree_gap values must be consistent prior to erase, - * with the possible exception of the "next" vma being erased if - * next->vm_start was reduced. + * with the possible exception of + * + * a. the "next" vma being erased if next->vm_start was reduced in + * __vma_adjust() -> __vma_unlink() + * b. the vma being erased in detach_vmas_to_be_unmapped() -> + * vma_rb_erase() */ validate_mm_rb(root, ignore); @@ -485,13 +489,7 @@ static __always_inline void vma_rb_erase_ignore(struct vm_area_struct *vma, static __always_inline void vma_rb_erase(struct vm_area_struct *vma, struct rb_root *root) { - /* - * All rb_subtree_gap values must be consistent prior to erase, - * with the possible exception of the vma being erased. - */ - validate_mm_rb(root, vma); - - __vma_rb_erase(vma, root); + vma_rb_erase_ignore(vma, root, vma); } /* -- 2.20.1 (Apple Git-117)