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=-9.6 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,FREEMAIL_FORGED_FROMDOMAIN,FREEMAIL_FROM, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI,SIGNED_OFF_BY, SPF_HELO_NONE,SPF_PASS 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 D4B05C4742C for ; Fri, 13 Nov 2020 14:11:12 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 898C22137B for ; Fri, 13 Nov 2020 14:11:12 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=163.com header.i=@163.com header.b="TrwUQ6hz" Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1726633AbgKMOLL (ORCPT ); Fri, 13 Nov 2020 09:11:11 -0500 Received: from m12-11.163.com ([220.181.12.11]:56351 "EHLO m12-11.163.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1726278AbgKMOLK (ORCPT ); Fri, 13 Nov 2020 09:11:10 -0500 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=163.com; s=s110527; h=Date:From:Subject:Message-ID:MIME-Version; bh=BPvet 3Bokc0CBtDtXhqknCUn3oJg8vZczH3XlVV+zN8=; b=TrwUQ6hzN1xsUAbWBf6Kj dwmNw/ro1i7kxnvtlTDzpid+RETNrODJZhjsFXREfYah5fzjZ8eMw5rB1EnF4s9K FzeUQIOUQEIy/llma5zJjQ6eHbaWgCncRi/6GIY8f6bQCtDqtNSnULp735w81zF3 RftE1X2X/sn899oikWGa1o= Received: from localhost (unknown [101.86.208.122]) by smtp7 (Coremail) with SMTP id C8CowAAXm3Dok65fL9JXBg--.38573S2; Fri, 13 Nov 2020 22:10:48 +0800 (CST) Date: Fri, 13 Nov 2020 22:10:48 +0800 From: Hui Su To: akpm@linux-foundation.org, linux-mm@kvack.org, linux-kernel@vger.kernel.org Cc: sh_def@163.com Subject: [PATCH] mm/page_counter: use page_counter_read in page_counter_set_max Message-ID: <20201113141048.GA178922@rlk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline X-CM-TRANSID: C8CowAAXm3Dok65fL9JXBg--.38573S2 X-Coremail-Antispam: 1Uf129KBjvdXoWruw1xAr1xCrWfZFWfZFWxCrg_yoW3twc_Aw 1kXF1DJrsIga47Ar1Ut3W3Xrn5t3s29rWkXryxtFyYy3WYqrySqF18AF13Jr4DJr4rXrs8 Gw1Fva4xur9xtjkaLaAFLSUrUUUUjb8apTn2vfkv8UJUUUU8Yxn0WfASr-VFAUDa7-sFnT 9fnUUvcSsGvfC2KfnxnUUI43ZEXa7IUU1xRDUUUUU== X-Originating-IP: [101.86.208.122] X-CM-SenderInfo: xvkbvvri6rljoofrz/1tbiIAnbX10TCJdzZwAAso Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org use page_counter_read() in page_counter_set_max(). Signed-off-by: Hui Su --- mm/page_counter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/mm/page_counter.c b/mm/page_counter.c index b24a60b28bb0..c6860f51b6c6 100644 --- a/mm/page_counter.c +++ b/mm/page_counter.c @@ -183,14 +183,14 @@ int page_counter_set_max(struct page_counter *counter, unsigned long nr_pages) * the limit, so if it sees the old limit, we see the * modified counter and retry. */ - usage = atomic_long_read(&counter->usage); + usage = page_counter_read(counter); if (usage > nr_pages) return -EBUSY; old = xchg(&counter->max, nr_pages); - if (atomic_long_read(&counter->usage) <= usage) + if (page_counter_read(counter) <= usage) return 0; counter->max = old; -- 2.29.0