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 A5B4BC433DF for ; Sat, 15 Aug 2020 22:12:35 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 6D17A20639 for ; Sat, 15 Aug 2020 22:12:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597529555; bh=++vL9+ojwEXDICxj/fe7a4hZzf7XNJzmA7W3ygUedH8=; h=Date:From:To:Subject:In-Reply-To:Reply-To:List-ID:From; b=vQobe7lpmKNLiscFvtXD1pPjnOAhZfqZzGBMKaqhDvmFJkjyq8imMxgNDSVDecRAP vp2iXOHyTa/G5iN5zbPfJqhIGc1MaZYv5ANHG259v7xj0i0N97bO6cKAjCmgBmOPg5 jKBDCZtmaftZYeukz1o76eY8cWvdFMQEAYOSxo3Q= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1728986AbgHOWMc (ORCPT ); Sat, 15 Aug 2020 18:12:32 -0400 Received: from mail.kernel.org ([198.145.29.99]:41762 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1729016AbgHOWK1 (ORCPT ); Sat, 15 Aug 2020 18:10:27 -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 D7DD622B4B; Sat, 15 Aug 2020 00:30:43 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1597451444; bh=++vL9+ojwEXDICxj/fe7a4hZzf7XNJzmA7W3ygUedH8=; h=Date:From:To:Subject:In-Reply-To:From; b=VO5/8TSH2Dxp5SXA992juoQM28EkKSzAiMeWKUlGQf3qzG53hBLLfK0rjogcqg/In jdWPVOEQ+NqixJS8V+y8oZpDMYo0xJ52F9CRdInj9Zc53IKdTNhCOS8R+sMdu1T0rl u6Xdp24dsIlD6A2mTbNCuuEDijoEz+yL4tLNlHsM= Date: Fri, 14 Aug 2020 17:30:43 -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 13/39] mm: introduce offset_in_thp Message-ID: <20200815003043.SkWT1tEoI%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: introduce offset_in_thp Mirroring offset_in_page(), this gives you the offset within this particular page, no matter what size page it is. It optimises down to offset_in_page() if CONFIG_TRANSPARENT_HUGEPAGE is not set. Link: http://lkml.kernel.org/r/20200629151959.15779-8-willy@infradead.org Signed-off-by: Matthew Wilcox (Oracle) Reviewed-by: David Hildenbrand Reviewed-by: William Kucharski Reviewed-by: Zi Yan Cc: Mike Kravetz Cc: "Kirill A. Shutemov" Signed-off-by: Andrew Morton --- include/linux/mm.h | 1 + 1 file changed, 1 insertion(+) --- a/include/linux/mm.h~mm-introduce-offset_in_thp +++ a/include/linux/mm.h @@ -1594,6 +1594,7 @@ static inline void clear_page_pfmemalloc extern void pagefault_out_of_memory(void); #define offset_in_page(p) ((unsigned long)(p) & ~PAGE_MASK) +#define offset_in_thp(page, p) ((unsigned long)(p) & (thp_size(page) - 1)) /* * Flags passed to show_mem() and show_free_areas() to suppress output in _