From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S933054AbbA3Oyo (ORCPT ); Fri, 30 Jan 2015 09:54:44 -0500 Received: from mga03.intel.com ([134.134.136.65]:4784 "EHLO mga03.intel.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S932515AbbA3Oyg (ORCPT ); Fri, 30 Jan 2015 09:54:36 -0500 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.09,491,1418112000"; d="scan'208";a="670328537" From: "Kirill A. Shutemov" To: Martin Schwidefsky , Andrew Morton Cc: linux-mm@kvack.org, linux-kernel@vger.kernel.org, Guenter Roeck , "Kirill A. Shutemov" , Heiko Carstens Subject: [PATCHv2 12/19] s390: expose number of page table levels Date: Fri, 30 Jan 2015 16:54:24 +0200 Message-Id: <1422629664-19954-1-git-send-email-kirill.shutemov@linux.intel.com> X-Mailer: git-send-email 2.1.4 In-Reply-To: <20150130154830.6e5c4774@mschwide> References: <20150130154830.6e5c4774@mschwide> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org We would want to use number of page table level to define mm_struct. Let's expose it as CONFIG_PGTABLE_LEVELS. Core mm expects __PAGETABLE_{PUD,PMD}_FOLDED to be defined if these page table levels folded. Signed-off-by: Kirill A. Shutemov Cc: Martin Schwidefsky Cc: Heiko Carstens --- v2: fix typo --- arch/s390/Kconfig | 5 +++++ arch/s390/include/asm/pgtable.h | 2 ++ 2 files changed, 7 insertions(+) diff --git a/arch/s390/Kconfig b/arch/s390/Kconfig index 8d11babf9aa5..6870e6ab903f 100644 --- a/arch/s390/Kconfig +++ b/arch/s390/Kconfig @@ -155,6 +155,11 @@ config S390 config SCHED_OMIT_FRAME_POINTER def_bool y +config PGTABLE_LEVELS + int + default 4 if 64BIT + default 2 + source "init/Kconfig" source "kernel/Kconfig.freezer" diff --git a/arch/s390/include/asm/pgtable.h b/arch/s390/include/asm/pgtable.h index fbb5ee3ae57c..e08ec38f8c6e 100644 --- a/arch/s390/include/asm/pgtable.h +++ b/arch/s390/include/asm/pgtable.h @@ -91,7 +91,9 @@ extern unsigned long zero_page_mask; */ #define PTRS_PER_PTE 256 #ifndef CONFIG_64BIT +#define __PAGETABLE_PUD_FOLDED #define PTRS_PER_PMD 1 +#define __PAGETABLE_PMD_FOLDED #define PTRS_PER_PUD 1 #else /* CONFIG_64BIT */ #define PTRS_PER_PMD 2048 -- 2.1.4