From patchwork Fri Jan 17 23:22:54 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Wei Yang X-Patchwork-Id: 11339995 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 6597D92A for ; Fri, 17 Jan 2020 23:23:17 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 3C9D124673 for ; Fri, 17 Jan 2020 23:23:17 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 3C9D124673 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=linux.intel.com Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id BE2906B050B; Fri, 17 Jan 2020 18:23:14 -0500 (EST) Delivered-To: linux-mm-outgoing@kvack.org Received: by kanga.kvack.org (Postfix, from userid 40) id B94D16B050C; Fri, 17 Jan 2020 18:23:14 -0500 (EST) 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 A0DEB6B050D; Fri, 17 Jan 2020 18:23:14 -0500 (EST) X-Original-To: linux-mm@kvack.org X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0161.hostedemail.com [216.40.44.161]) by kanga.kvack.org (Postfix) with ESMTP id 85D1A6B050B for ; Fri, 17 Jan 2020 18:23:14 -0500 (EST) Received: from smtpin10.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay04.hostedemail.com (Postfix) with SMTP id 504F54DA1 for ; Fri, 17 Jan 2020 23:23:14 +0000 (UTC) X-FDA: 76388704308.10.spoon03_394d5829d172e X-Spam-Summary: 1,0,0,,d41d8cd98f00b204,richardw.yang@linux.intel.com,:akpm@linux-foundation.org:dan.j.williams@intel.com:aneesh.kumar@linux.ibm.com:kirill@shutemov.name:yang.shi@linux.alibaba.com:richardw.yang@linux.intel.com:thellstrom@vmware.com:linux-kernel@vger.kernel.org:,RULES_HIT:30054:30070,0,RBL:134.134.136.31:@linux.intel.com:.lbl8.mailshell.net-62.18.0.100 64.95.201.95,CacheIP:none,Bayesian:0.5,0.5,0.5,Netcheck:none,DomainCache:0,MSF:not bulk,SPF:fn,MSBL:0,DNSBL:neutral,Custom_rules:0:0:0,LFtime:25,LUA_SUMMARY:none X-HE-Tag: spoon03_394d5829d172e X-Filterd-Recvd-Size: 2715 Received: from mga06.intel.com (mga06.intel.com [134.134.136.31]) by imf30.hostedemail.com (Postfix) with ESMTP for ; Fri, 17 Jan 2020 23:23:13 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga104.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 17 Jan 2020 15:23:13 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.70,332,1574150400"; d="scan'208";a="306388189" Received: from richard.sh.intel.com (HELO localhost) ([10.239.159.54]) by orsmga001.jf.intel.com with ESMTP; 17 Jan 2020 15:23:11 -0800 From: Wei Yang To: akpm@linux-foundation.org, dan.j.williams@intel.com, aneesh.kumar@linux.ibm.com, kirill@shutemov.name, yang.shi@linux.alibaba.com, richardw.yang@linux.intel.com, thellstrom@vmware.com Cc: linux-kernel@vger.kernel.org, linux-mm@kvack.org Subject: [PATCH 5/5] mm/mremap: start addresses are properly aligned Date: Sat, 18 Jan 2020 07:22:54 +0800 Message-Id: <20200117232254.2792-6-richardw.yang@linux.intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20200117232254.2792-1-richardw.yang@linux.intel.com> References: <20200117232254.2792-1-richardw.yang@linux.intel.com> 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: After previous cleanup, extent is the minimal step for both source and destination. This means when extent is HPAGE_PMD_SIZE or PMD_SIZE, old_addr and new_addr are properly aligned too. Since these two functions are only invoked in move_page_tables, it is safe to remove the check now. Signed-off-by: Wei Yang --- mm/huge_memory.c | 3 --- mm/mremap.c | 3 --- 2 files changed, 6 deletions(-) diff --git a/mm/huge_memory.c b/mm/huge_memory.c index 8f1bbbf01f5b..cc98d0f07d0a 100644 --- a/mm/huge_memory.c +++ b/mm/huge_memory.c @@ -1878,9 +1878,6 @@ bool move_huge_pmd(struct vm_area_struct *vma, unsigned long old_addr, struct mm_struct *mm = vma->vm_mm; bool force_flush = false; - if ((old_addr & ~HPAGE_PMD_MASK) || (new_addr & ~HPAGE_PMD_MASK)) - return false; - /* * The destination pmd shouldn't be established, free_pgtables() * should have release it. diff --git a/mm/mremap.c b/mm/mremap.c index 37335a10779d..5d7597fb3023 100644 --- a/mm/mremap.c +++ b/mm/mremap.c @@ -199,9 +199,6 @@ static bool move_normal_pmd(struct vm_area_struct *vma, unsigned long old_addr, struct mm_struct *mm = vma->vm_mm; pmd_t pmd; - if ((old_addr & ~PMD_MASK) || (new_addr & ~PMD_MASK)) - return false; - /* * The destination pmd shouldn't be established, free_pgtables() * should have release it.