From patchwork Sun Aug 9 23:20:57 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Yang X-Patchwork-Id: 11706851 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 49FCA13B6 for ; Sun, 9 Aug 2020 23:21:13 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 203ED206D8 for ; Sun, 9 Aug 2020 23:21:13 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 203ED206D8 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.alibaba.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 97E6C6B0003; Sun, 9 Aug 2020 19:21:09 -0400 (EDT) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id 8D1E06B0008; Sun, 9 Aug 2020 19:21:09 -0400 (EDT) X-Original-To: int-list-linux-mm@kvack.org X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id 6A5BA6B0005; Sun, 9 Aug 2020 19:21:09 -0400 (EDT) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0172.hostedemail.com [216.40.44.172]) by kanga.kvack.org (Postfix) with ESMTP id 4CACA6B0006 for ; Sun, 9 Aug 2020 19:21:09 -0400 (EDT) Received: from smtpin01.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 0B7EF180AD801 for ; Sun, 9 Aug 2020 23:21:09 +0000 (UTC) X-FDA: 77132603058.01.stew09_5e0216b26fd5 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin01.hostedemail.com (Postfix) with ESMTP id D06881004CE3B for ; Sun, 9 Aug 2020 23:21:08 +0000 (UTC) X-Spam-Summary: 1,0,0,7114a6aa5a82ada9,d41d8cd98f00b204,richard.weiyang@linux.alibaba.com,,RULES_HIT:41:355:379:541:960:973:988:989:1260:1261:1311:1314:1345:1359:1437:1515:1534:1541:1711:1730:1747:1777:1792:2393:2559:2562:3138:3139:3140:3141:3142:3352:3865:3866:3867:3870:4321:5007:6261:9592:10004:11026:11658:11914:12043:12114:12296:12297:12438:12555:12895:12986:13069:13161:13229:13311:13357:13894:14096:14181:14384:14394:14721:21080:21222:21627:30012:30054:30065,0,RBL:115.124.30.133:@linux.alibaba.com:.lbl8.mailshell.net-62.20.2.100 64.201.201.201;04yr9iaab7se6agdbu3krbd3pc3kkopsdgp898p9dcgaijf5hyhi345kp68n9s7.8afahnaeerr3tutatg1ft3smdxxe8z8gxweg9f6yz79hd1xiruqu5rixbs9ij4u.c-lbl8.mailshell.net-223.238.255.100,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fp,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:23,LUA_SUMMARY:none X-HE-Tag: stew09_5e0216b26fd5 X-Filterd-Recvd-Size: 2672 Received: from out30-133.freemail.mail.aliyun.com (out30-133.freemail.mail.aliyun.com [115.124.30.133]) by imf44.hostedemail.com (Postfix) with ESMTP for ; Sun, 9 Aug 2020 23:21:07 +0000 (UTC) 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 X-Rspamd-Queue-Id: D06881004CE3B X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam03 X-Bogosity: Ham, tests=bogofilter, spamicity=0.000003, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: 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); } /*