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=-10.0 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=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 EB80BC43387 for ; Fri, 28 Dec 2018 12:14:46 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by mail.kernel.org (Postfix) with ESMTP id BD8E9218FD for ; Fri, 28 Dec 2018 12:14:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1545999286; bh=Qjfn1vFeDBCqlf/QEnd2BYQyAq36nZsOCznt3wXd5HE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:List-ID:From; b=OCX4V5OQP4JzfrOBCltUGjSMr/o4JhqWrbzXXjST3einy0/9AFIt+qGILCxpwnimT oBkPS2J4gb1UAmrG0d9Fl1r9RnTK6mbS46KpeuDKWU52ApR9FV0vUaYgZHrjoFFhke tqRCv8lfhNOWuxYRU/noVWMLvEMRUai+gxaF/0mc= Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1731297AbeL1MOp (ORCPT ); Fri, 28 Dec 2018 07:14:45 -0500 Received: from mail.kernel.org ([198.145.29.99]:33584 "EHLO mail.kernel.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1731113AbeL1MOj (ORCPT ); Fri, 28 Dec 2018 07:14:39 -0500 Received: from localhost (5356596B.cm-6-7b.dynamic.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 B100C20866; Fri, 28 Dec 2018 12:14:38 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=kernel.org; s=default; t=1545999279; bh=Qjfn1vFeDBCqlf/QEnd2BYQyAq36nZsOCznt3wXd5HE=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=IMS8cW28rwJ30qE4ImyP3syXlwHyP20a9NEn3nV7ucN0D4JJ4rhRhyaG53KdALFML r2f5GnAroDYH5L9Vs5ZgCS4K8emd/WQvuO/iX0OV8c5bv7RV4V/84JZbIhXVYc0fpT Ppxuq77jwna3Ff8aE1oe7w30H4f0+fVBxSChH2M0= 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 4.19 33/46] mm: introduce mm_[p4d|pud|pmd]_folded Date: Fri, 28 Dec 2018 12:52:27 +0100 Message-Id: <20181228113126.764275627@linuxfoundation.org> X-Mailer: git-send-email 2.20.1 In-Reply-To: <20181228113124.971620049@linuxfoundation.org> References: <20181228113124.971620049@linuxfoundation.org> User-Agent: quilt/0.65 X-stable: review X-Patchwork-Hint: ignore MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Sender: linux-kernel-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org 4.19-stable review patch. If anyone has any objections, please let me know. ------------------ [ 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 88ebc6102c7c..15fd0277ffa6 100644 --- a/include/asm-generic/pgtable.h +++ b/include/asm-generic/pgtable.h @@ -1127,4 +1127,20 @@ 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 */ -- 2.19.1