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=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,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 DC7A5C433C1 for ; Sat, 20 Mar 2021 11:45:52 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 9E39361972 for ; Sat, 20 Mar 2021 11:45:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S229903AbhCTLpV (ORCPT ); Sat, 20 Mar 2021 07:45:21 -0400 Received: from szxga07-in.huawei.com ([45.249.212.35]:14835 "EHLO szxga07-in.huawei.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S229787AbhCTLpK (ORCPT ); Sat, 20 Mar 2021 07:45:10 -0400 Received: from DGGEMS413-HUB.china.huawei.com (unknown [172.30.72.60]) by szxga07-in.huawei.com (SkyGuard) with ESMTP id 4F2bH72JBpz91CR; Sat, 20 Mar 2021 17:36:03 +0800 (CST) Received: from huawei.com (10.175.104.175) by DGGEMS413-HUB.china.huawei.com (10.3.19.213) with Microsoft SMTP Server id 14.3.498.0; Sat, 20 Mar 2021 17:37:51 +0800 From: Miaohe Lin To: CC: , , , , Subject: [PATCH 4/5] mm/migrate.c: use helper migrate_vma_collect_skip() in migrate_vma_collect_hole() Date: Sat, 20 Mar 2021 05:37:00 -0400 Message-ID: <20210320093701.12829-5-linmiaohe@huawei.com> X-Mailer: git-send-email 2.19.1 In-Reply-To: <20210320093701.12829-1-linmiaohe@huawei.com> References: <20210320093701.12829-1-linmiaohe@huawei.com> MIME-Version: 1.0 Content-Transfer-Encoding: 7BIT Content-Type: text/plain; charset=US-ASCII X-Originating-IP: [10.175.104.175] X-CFilter-Loop: Reflected Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org It's more recommended to use helper function migrate_vma_collect_skip() to skip the unexpected case and it also helps remove some duplicated codes. Move migrate_vma_collect_skip() above migrate_vma_collect_hole() to avoid compiler warning. Signed-off-by: Miaohe Lin --- mm/migrate.c | 28 +++++++++++----------------- 1 file changed, 11 insertions(+), 17 deletions(-) diff --git a/mm/migrate.c b/mm/migrate.c index 271081b014cb..3e169b72d7b2 100644 --- a/mm/migrate.c +++ b/mm/migrate.c @@ -2315,44 +2315,38 @@ int migrate_misplaced_transhuge_page(struct mm_struct *mm, #endif /* CONFIG_NUMA */ #ifdef CONFIG_DEVICE_PRIVATE -static int migrate_vma_collect_hole(unsigned long start, +static int migrate_vma_collect_skip(unsigned long start, unsigned long end, - __always_unused int depth, struct mm_walk *walk) { struct migrate_vma *migrate = walk->private; unsigned long addr; - /* Only allow populating anonymous memory. */ - if (!vma_is_anonymous(walk->vma)) { - for (addr = start; addr < end; addr += PAGE_SIZE) { - migrate->src[migrate->npages] = 0; - migrate->dst[migrate->npages] = 0; - migrate->npages++; - } - return 0; - } - for (addr = start; addr < end; addr += PAGE_SIZE) { - migrate->src[migrate->npages] = MIGRATE_PFN_MIGRATE; migrate->dst[migrate->npages] = 0; - migrate->npages++; - migrate->cpages++; + migrate->src[migrate->npages++] = 0; } return 0; } -static int migrate_vma_collect_skip(unsigned long start, +static int migrate_vma_collect_hole(unsigned long start, unsigned long end, + __always_unused int depth, struct mm_walk *walk) { struct migrate_vma *migrate = walk->private; unsigned long addr; + /* Only allow populating anonymous memory. */ + if (!vma_is_anonymous(walk->vma)) + return migrate_vma_collect_skip(start, end, walk); + for (addr = start; addr < end; addr += PAGE_SIZE) { + migrate->src[migrate->npages] = MIGRATE_PFN_MIGRATE; migrate->dst[migrate->npages] = 0; - migrate->src[migrate->npages++] = 0; + migrate->npages++; + migrate->cpages++; } return 0; -- 2.19.1