From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1758760Ab2IKQrc (ORCPT ); Tue, 11 Sep 2012 12:47:32 -0400 Received: from cam-admin0.cambridge.arm.com ([217.140.96.50]:61468 "EHLO cam-admin0.cambridge.arm.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1758427Ab2IKQr3 (ORCPT ); Tue, 11 Sep 2012 12:47:29 -0400 From: Will Deacon To: linux-mm@kvack.org Cc: linux-kernel@vger.kernel.org, linux-arch@vger.kernel.org, akpm@linux-foundation.org, mhocko@suse.cz, Steve Capper , Will Deacon Subject: [PATCH 3/3] mm: Introduce HAVE_ARCH_TRANSPARENT_HUGEPAGE Date: Tue, 11 Sep 2012 17:47:16 +0100 Message-Id: <1347382036-18455-4-git-send-email-will.deacon@arm.com> X-Mailer: git-send-email 1.7.4.1 In-Reply-To: <1347382036-18455-1-git-send-email-will.deacon@arm.com> References: <1347382036-18455-1-git-send-email-will.deacon@arm.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: Steve Capper Different architectures have slightly different pre-requisites for supporting Transparent Huge Pages. To simplify the layout of mm/Kconfig, a new option HAVE_ARCH_TRANSPARENT_HUGEPAGE is introduced and set in each architecture's Kconfig file (at the moment x86, with ARM being set in a future patch). Signed-off-by: Steve Capper Signed-off-by: Will Deacon --- arch/x86/Kconfig | 4 ++++ mm/Kconfig | 2 +- 2 files changed, 5 insertions(+), 1 deletions(-) diff --git a/arch/x86/Kconfig b/arch/x86/Kconfig index 8ec3a1a..7decdcf 100644 --- a/arch/x86/Kconfig +++ b/arch/x86/Kconfig @@ -1297,6 +1297,10 @@ config ILLEGAL_POINTER_VALUE default 0 if X86_32 default 0xdead000000000000 if X86_64 +config HAVE_ARCH_TRANSPARENT_HUGEPAGE + def_bool y + depends on MMU + source "mm/Kconfig" config HIGHPTE diff --git a/mm/Kconfig b/mm/Kconfig index d5c8019..3322342 100644 --- a/mm/Kconfig +++ b/mm/Kconfig @@ -318,7 +318,7 @@ config NOMMU_INITIAL_TRIM_EXCESS config TRANSPARENT_HUGEPAGE bool "Transparent Hugepage Support" - depends on X86 && MMU + depends on HAVE_ARCH_TRANSPARENT_HUGEPAGE select COMPACTION help Transparent Hugepages allows the kernel to use huge pages and -- 1.7.4.1