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=-7.0 required=3.0 tests=BAYES_00,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 69B68C433E3 for ; Sat, 15 Aug 2020 00:30:43 +0000 (UTC) Received: from kanga.kvack.org (kanga.kvack.org [205.233.56.17]) by mail.kernel.org (Postfix) with ESMTP id 2F0A922B4B for ; Sat, 15 Aug 2020 00:30:43 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (1024-bit key) header.d=kernel.org header.i=@kernel.org header.b="zR2JFeg0" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 2F0A922B4B 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 CEFB56B002A; Fri, 14 Aug 2020 20:30:42 -0400 (EDT) Received: by kanga.kvack.org (Postfix, from userid 40) id CA53C6B002B; Fri, 14 Aug 2020 20:30:42 -0400 (EDT) X-Delivered-To: int-list-linux-mm@kvack.org Received: by kanga.kvack.org (Postfix, from userid 63042) id B68736B002C; Fri, 14 Aug 2020 20:30:42 -0400 (EDT) X-Delivered-To: linux-mm@kvack.org Received: from forelay.hostedemail.com (smtprelay0162.hostedemail.com [216.40.44.162]) by kanga.kvack.org (Postfix) with ESMTP id 9722A6B002A for ; Fri, 14 Aug 2020 20:30:42 -0400 (EDT) Received: from smtpin18.hostedemail.com (10.5.19.251.rfc1918.com [10.5.19.251]) by forelay01.hostedemail.com (Postfix) with ESMTP id 58040180AD815 for ; Sat, 15 Aug 2020 00:30:42 +0000 (UTC) X-FDA: 77150922324.18.cats01_470255e27001 Received: from filter.hostedemail.com (10.5.16.251.rfc1918.com [10.5.16.251]) by smtpin18.hostedemail.com (Postfix) with ESMTP id 284AE100EC688 for ; Sat, 15 Aug 2020 00:30:42 +0000 (UTC) X-HE-Tag: cats01_470255e27001 X-Filterd-Recvd-Size: 3031 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by imf16.hostedemail.com (Postfix) with ESMTP for ; Sat, 15 Aug 2020 00:30:41 +0000 (UTC) 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 A003522B4E; Sat, 15 Aug 2020 00:30:40 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597451441; bh=4gUH5r9Rmyz4qBoRBb3or7wxet4s+5ZjYSJEvmCHUD4=; h=Date:From:To:Subject:In-Reply-To:From; b=zR2JFeg0N9WmFUie4nqi0Cy//8WBEvuztRwK2M+pFHFJk2qrY+cAXqU4ZOJJMUEmc 4EPwK0DbGMQrje1lNM+9jawXcE15GNRzaMOc9TPSPtua5rRMCvICIPAgypxlTSPzy0 6kusoqzspLjkmPqDGbw2+X4qyytyki8D4zVXm6wA= Date: Fri, 14 Aug 2020 17:30:40 -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 12/39] mm: add thp_head Message-ID: <20200815003040.fakiVe6j8%akpm@linux-foundation.org> In-Reply-To: <20200814172939.55d6d80b6e21e4241f1ee1f3@linux-foundation.org> User-Agent: s-nail v14.8.16 X-Rspamd-Queue-Id: 284AE100EC688 X-Spamd-Result: default: False [0.00 / 100.00] X-Rspamd-Server: rspam02 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: "Matthew Wilcox (Oracle)" Subject: mm: add thp_head This is like compound_head() but compiles away when CONFIG_TRANSPARENT_HUGEPAGE is not enabled. Link: http://lkml.kernel.org/r/20200629151959.15779-7-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 | 15 +++++++++++++++ 1 file changed, 15 insertions(+) --- a/include/linux/huge_mm.h~mm-add-thp_head +++ a/include/linux/huge_mm.h @@ -260,6 +260,15 @@ static inline spinlock_t *pud_trans_huge } /** + * thp_head - Head page of a transparent huge page. + * @page: Any page (tail, head or regular) found in the page cache. + */ +static inline struct page *thp_head(struct page *page) +{ + return compound_head(page); +} + +/** * thp_order - Order of a transparent huge page. * @page: Head page of a transparent huge page. */ @@ -335,6 +344,12 @@ static inline struct list_head *page_def #define HPAGE_PUD_MASK ({ BUILD_BUG(); 0; }) #define HPAGE_PUD_SIZE ({ BUILD_BUG(); 0; }) +static inline struct page *thp_head(struct page *page) +{ + VM_BUG_ON_PGFLAGS(PageTail(page), page); + return page; +} + static inline unsigned int thp_order(struct page *page) { VM_BUG_ON_PGFLAGS(PageTail(page), page); _