From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752353AbbEZIca (ORCPT ); Tue, 26 May 2015 04:32:30 -0400 Received: from mail.skyhub.de ([78.46.96.112]:44765 "EHLO mail.skyhub.de" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1751361AbbEZI2Z (ORCPT ); Tue, 26 May 2015 04:28:25 -0400 From: Borislav Petkov To: Ingo Molnar Cc: X86-ML , LKML Subject: [PATCH 13/18] x86/mm/pat: Export pat_enabled() Date: Tue, 26 May 2015 10:28:16 +0200 Message-Id: <1432628901-18044-14-git-send-email-bp@alien8.de> X-Mailer: git-send-email 1.9.0.258.g00eda23 In-Reply-To: <1432628901-18044-1-git-send-email-bp@alien8.de> References: <1432628901-18044-1-git-send-email-bp@alien8.de> 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. Signed-off-by: Luis R. Rodriguez 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: Michael S. Tsirkin Link: http://lkml.kernel.org/r/1430425520-22275-4-git-send-email-mcgrof@do-not-panic.com Signed-off-by: Borislav Petkov --- 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 484dce7f759b..a1c96544099d 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; -- 1.9.0.258.g00eda23