From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752966AbbD3UeN (ORCPT ); Thu, 30 Apr 2015 16:34:13 -0400 Received: from mail-pd0-f171.google.com ([209.85.192.171]:35885 "EHLO mail-pd0-f171.google.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1752843AbbD3UeK (ORCPT ); Thu, 30 Apr 2015 16:34:10 -0400 From: "Luis R. Rodriguez" To: bp@suse.de, mingo@elte.hu, tglx@linutronix.de, hpa@zytor.com, plagnioj@jcrosoft.com, tomi.valkeinen@ti.com, daniel.vetter@intel.com, airlied@linux.ie Cc: dledford@redhat.com, awalls@md.metrocast.net, syrjala@sci.fi, luto@amacapital.net, mst@redhat.com, cocci@systeme.lip6.fr, linux-kernel@vger.kernel.org, "Luis R. Rodriguez" , Juergen Gross , Daniel Vetter , Dave Airlie , Bjorn Helgaas , x86@kernel.org Subject: [PATCH v5 3/6] arch/x86/mm/pat: export pat_enabled() Date: Thu, 30 Apr 2015 13:25:17 -0700 Message-Id: <1430425520-22275-4-git-send-email-mcgrof@do-not-panic.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1430425520-22275-1-git-send-email-mcgrof@do-not-panic.com> References: <1430425520-22275-1-git-send-email-mcgrof@do-not-panic.com> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org From: "Luis R. Rodriguez" Two Linux device drivers cannot work with PAT and the work required to make them work is significant. There is not enough motivation to convert these drivers over to use PAT properly, the compromise reached is to let drivers that cannot be ported to PAT check if PAT was enabled and if so fail on probe with a recommendation to boot with the "nopat" kernel parameter. Cc: Andy Walls Cc: Doug Ledford Cc: Andy Lutomirski Cc: Ingo Molnar Cc: Thomas Gleixner Cc: Juergen Gross Cc: Daniel Vetter Cc: Dave Airlie Cc: Bjorn Helgaas Cc: Borislav Petkov Cc: Michael S. Tsirkin Cc: linux-kernel@vger.kernel.org Cc: x86@kernel.org Signed-off-by: Luis R. Rodriguez --- arch/x86/mm/pat.c | 1 + 1 file changed, 1 insertion(+) diff --git a/arch/x86/mm/pat.c b/arch/x86/mm/pat.c index f64785e..3d60207 100644 --- a/arch/x86/mm/pat.c +++ b/arch/x86/mm/pat.c @@ -55,6 +55,7 @@ bool pat_enabled(void) { return !!__pat_enabled; } +EXPORT_SYMBOL_GPL(pat_enabled); int pat_debug_enable; -- 2.3.2.209.gd67f9d5.dirty