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=-6.0 required=3.0 tests=BAYES_00,DATE_IN_PAST_12_24, DKIMWL_WL_HIGH,DKIM_SIGNED,DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS, MAILING_LIST_MULTI,SIGNED_OFF_BY,SPF_HELO_NONE,SPF_PASS autolearn=no 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 B0331C433DF for ; Sat, 15 Aug 2020 22:11:48 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 7D6BE20657 for ; Sat, 15 Aug 2020 22:11:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597529508; bh=CVslb6CC+9gDItRk12qCWMZx1uHETuLm4WSjDJFhgD8=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=DT3SA2H/Zju7EpUguujvSkXWxFlRhaS7MukRHgN5ROXyC2W2/LBMU+LCZO+XyOOKV aeADrVPSj1EHeowcvofBP8YoS6XH4DNdiV2nDGyCgYC+jlfEObWsQe5bmSGNRPlImI Zj7XgC2PDQ9ZjQXieLwaM4bCOYD4c433rDmUQXCg= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729314AbgHOWKa (ORCPT ); Sat, 15 Aug 2020 18:10:30 -0400 Received: from mail.kernel.org ([198.145.29.99]:41778 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1728590AbgHOWK2 (ORCPT ); Sat, 15 Aug 2020 18:10:28 -0400 Received: from localhost.localdomain (c-73-231-172-41.hsd1.ca.comcast.net [73.231.172.41]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id 68B4822BF5; Sat, 15 Aug 2020 00:30:30 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597451431; bh=CVslb6CC+9gDItRk12qCWMZx1uHETuLm4WSjDJFhgD8=; h=Date:From:To:Subject:In-Reply-To:From; b=1OtGZLK663dXj62keN6VCshusQcF7PMZ2s3V6+SrL3rUIgqrmtRZw1DpVChWJyyHq tdQ7YGbs125x4yg3llKeIOmfSorlnxANgZqBcfAKo7ykzT8YGbMNiRioFUvDOkXqnO uPNE13XZV3pHhVghBA6pcFmBjKZE4uUUGy26iAio= Date: Fri, 14 Aug 2020 17:30:30 -0700 From: Andrew Morton To: akpm@linux-foundation.org, david@redhat.com, kirill.shutemov@linux.intel.com, linux-mm@kvack.org, mike.kravetz@oracle.com, mm-commits@vger.kernel.org, torvalds@linux-foundation.org, william.kucharski@oracle.com, willy@infradead.org, ziy@nvidia.com Subject: [patch 09/39] mm: add thp_order Message-ID: <20200815003030.WpMt3aGto%akpm@linux-foundation.org> In-Reply-To: <20200814172939.55d6d80b6e21e4241f1ee1f3@linux-foundation.org> User-Agent: s-nail v14.8.16 Sender: mm-commits-owner@vger.kernel.org Precedence: bulk Reply-To: linux-kernel@vger.kernel.org List-ID: X-Mailing-List: mm-commits@vger.kernel.org From: "Matthew Wilcox (Oracle)" Subject: mm: add thp_order This function returns the order of a transparent huge page. It compiles to 0 if CONFIG_TRANSPARENT_HUGEPAGE is disabled. Link: http://lkml.kernel.org/r/20200629151959.15779-4-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: William Kucharski Reviewed-by: Zi Yan Cc: David Hildenbrand Cc: Mike Kravetz Cc: "Kirill A. Shutemov" Signed-off-by: Andrew Morton --- include/linux/huge_mm.h | 19 +++++++++++++++++++ 1 file changed, 19 insertions(+) --- a/include/linux/huge_mm.h~mm-add-thp_order +++ a/include/linux/huge_mm.h @@ -258,6 +258,19 @@ static inline spinlock_t *pud_trans_huge else return NULL; } + +/** + * thp_order - Order of a transparent huge page. + * @page: Head page of a transparent huge page. + */ +static inline unsigned int thp_order(struct page *page) +{ + VM_BUG_ON_PGFLAGS(PageTail(page), page); + if (PageHead(page)) + return HPAGE_PMD_ORDER; + return 0; +} + static inline int hpage_nr_pages(struct page *page) { if (unlikely(PageTransHuge(page))) @@ -317,6 +330,12 @@ static inline struct list_head *page_def #define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; }) #define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; }) +static inline unsigned int thp_order(struct page *page) +{ + VM_BUG_ON_PGFLAGS(PageTail(page), page); + return 0; +} + static inline int hpage_nr_pages(struct page *page) { VM_BUG_ON_PAGE(PageTail(page), page); _