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=-9.0 required=3.0 tests=DKIMWL_WL_HIGH,DKIM_SIGNED, DKIM_VALID,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_PATCH,MAILING_LIST_MULTI, SIGNED_OFF_BY,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable 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 A58CAC04E53 for ; Wed, 15 May 2019 11:56:00 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id 77A7220657 for ; Wed, 15 May 2019 11:56:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557921360; bh=spzag9FA6PtrQsdcN8fGfgMmi8VIW4MnEbnxTDAdelg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=GL3lsjPYL2dteWMRmg3IImlTYMsv2QZrojUJFe2wQPY+RJs+gYYxO7uQt/EgUQw3W tdDDjRm7AjVmO7fJAXabtiwWrljg4ZMhb3JYhHjDsl9nn5nxHL5kOEzTLkcNXlPV56 zVx/3VXBncWVem3X6th/JW6qXjVZpP3XQVwtzJDw= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1729590AbfEOLSQ (ORCPT ); Wed, 15 May 2019 07:18:16 -0400 Received: from mail.kernel.org ([198.145.29.99]:55676 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1730766AbfEOLSN (ORCPT ); Wed, 15 May 2019 07:18:13 -0400 Received: from localhost (83-86-89-107.cable.dynamic.v4.ziggo.nl [83.86.89.107]) (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 8A63320843; Wed, 15 May 2019 11:18:12 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1557919093; bh=spzag9FA6PtrQsdcN8fGfgMmi8VIW4MnEbnxTDAdelg=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=MwoIbVhAFPE+K53+aLOyfj6SzY6pCGDVy/C8NUp0h01a4uxf4y9dO1gEqGNKxbyVZ B0354WmdST8dabgCIfVS+rDPWH+A5q+FX7YKfV4Kv+4FJHmws+JIuzAPB0I7RCOEvV Av615Ecnf/94cd97sFQx3VmRQgJ5Nv4hXBILqBIg= From: Greg Kroah-Hartman To: linux-kernel@vger.kernel.org Cc: Greg Kroah-Hartman , stable@vger.kernel.org, "Kirill A. Shutemov" , Martin Schwidefsky , Sasha Levin Subject: [PATCH 4.14 065/115] mm: introduce mm_[p4d|pud|pmd]_folded Date: Wed, 15 May 2019 12:55:45 +0200 Message-Id: <20190515090704.245581808@linuxfoundation.org> X-Mailer: git-send-email 2.21.0 In-Reply-To: <20190515090659.123121100@linuxfoundation.org> References: <20190515090659.123121100@linuxfoundation.org> User-Agent: quilt/0.66 MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: stable-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: stable@vger.kernel.org [ Upstream commit 1071fc5779d9846fec56a4ff6089ab08cac1ab72 ] Add three architecture overrideable functions to test if the p4d, pud, or pmd layer of a page table is folded or not. Acked-by: Kirill A. Shutemov Signed-off-by: Martin Schwidefsky Signed-off-by: Sasha Levin --- include/asm-generic/pgtable.h | 16 ++++++++++++++++ 1 file changed, 16 insertions(+) diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h index f00421dfacbd0..0c21014a38f23 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1081,4 +1081,20 @@ static inline bool arch_has_pfn_modify_check(void) #endif #endif +/* + * On some architectures it depends on the mm if the p4d/pud or pmd + * layer of the page table hierarchy is folded or not. + */ +#ifndef mm_p4d_folded +#define mm_p4d_folded(mm) __is_defined(__PAGETABLE_P4D_FOLDED) +#endif + +#ifndef mm_pud_folded +#define mm_pud_folded(mm) __is_defined(__PAGETABLE_PUD_FOLDED) +#endif + +#ifndef mm_pmd_folded +#define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) +#endif + #endif /* _ASM_GENERIC_PGTABLE_H */ -- 2.20.1