From patchwork Tue Dec 15 03:06:58 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrew Morton X-Patchwork-Id: 11973733 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=-15.7 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED 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 B69D6C4361B for ; Tue, 15 Dec 2020 03:07:01 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 73AD1224B1 for ; Tue, 15 Dec 2020 03:07:01 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 73AD1224B1 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=linux-foundation.org Authentication-Results: mail.kernel.org; spf=pass smtp.mailfrom=owner-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix) id 1034A8D0007; Mon, 14 Dec 2020 22:07:01 -0500 (EST) Received: by kanga.kvack.org (Postfix, from userid 40) id 08D5F6B00A9; Mon, 14 Dec 2020 22:07:01 -0500 (EST) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id E9AF98D0007; Mon, 14 Dec 2020 22:07:00 -0500 (EST) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0238.hostedemail.com [216.40.44.238]) by kanga.kvack.org (Postfix) with ESMTP id C83C76B00A8 for ; Mon, 14 Dec 2020 22:07:00 -0500 (EST) Received: from smtpin15.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay05.hostedemail.com (Postfix) with ESMTP id 8E12D181AEF39 for ; Tue, 15 Dec 2020 03:07:00 +0000 (UTC) X-FDA: 77594029800.15.pull66_6010f6a27420 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin15.hostedemail.com (Postfix) with ESMTP id 6EF551814B0C1 for ; Tue, 15 Dec 2020 03:07:00 +0000 (UTC) X-HE-Tag: pull66_6010f6a27420 X-Filterd-Recvd-Size: 2140 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf41.hostedemail.com (Postfix) with ESMTP for ; Tue, 15 Dec 2020 03:06:59 +0000 (UTC) Date: Mon, 14 Dec 2020 19:06:58 -0800 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=linux-foundation.org; s=korg; t=1608001619; bh=FpdvWQ14XbLJZFBX0PzgmuFtx8SnJaF2BXWMwE10v7s=; h=From:To:Subject:In-Reply-To:From; b=QTQitkCFt6nYh9v8KrxqUrhI1uD7dx30zGa479KD/9bWjg/f2XKZQQi1wCw0kUSES Xb92nBkCE3y+AgvDy+7bqDOIwGPYGGcXzo9a4UHBx85kSp4uQ+LioLWnHGAzciQIEz KXOWfPXXe1WF7BBl2wk2wBAUZKNsE2/OkZ29Hktk= From: Andrew Morton To: akpm@linux-foundation.org, linux-mm@kvack.org, mm-commits@vger.kernel.org, pankaj.gupta@cloud.ionos.com, sh_def@163.com, torvalds@linux-foundation.org Subject: [patch 066/200] mm/page_counter: use page_counter_read in page_counter_set_max Message-ID: <20201215030658.dSgSOYOYo%akpm@linux-foundation.org> In-Reply-To: <20201214190237.a17b70ae14f129e2dca3d204@linux-foundation.org> User-Agent: s-nail v14.8.16 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: From: Hui Su Subject: mm/page_counter: use page_counter_read in page_counter_set_max Use page_counter_read() in page_counter_set_max(). Link: https://lkml.kernel.org/r/20201113141048.GA178922@rlk Signed-off-by: Hui Su Reviewed-by: Pankaj Gupta Signed-off-by: Andrew Morton --- mm/page_counter.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) --- a/mm/page_counter.c~mm-page_counter-use-page_counter_read-in-page_counter_set_max +++ a/mm/page_counter.c @@ -183,14 +183,14 @@ int page_counter_set_max(struct page_cou * 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;