linux-kernel - [tip:x86/apic] x86/apic: Correctly detect X2APIC status in function enable

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Date:	Thu, 15 Jan 2015 05:00:14 -0800
From:	tip-bot for Jiang Liu <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	tglx@...utronix.de, bp@...en8.de, JBeulich@...e.com,
	hpa@...ux.intel.com, yinghai@...nel.org, joro@...tes.org,
	d.hatayama@...fujitsu.com, rientjes@...gle.com,
	linux-kernel@...r.kernel.org, oren@...lemp.com,
	jiang.liu@...ux.intel.com, mingo@...nel.org, richard@....at,
	benh@...nel.crashing.org, tony.luck@...el.com, hpa@...or.com
Subject: [tip:x86/apic] x86/apic:
  Correctly detect X2APIC status in function enable_IR()

Commit-ID:  89356cf20ecb0b9975b1dad9ed605dd4c6e68bcd
Gitweb:     http://git.kernel.org/tip/89356cf20ecb0b9975b1dad9ed605dd4c6e68bcd
Author:     Jiang Liu <jiang.liu@...ux.intel.com>
AuthorDate: Wed, 7 Jan 2015 15:31:33 +0800
Committer:  Thomas Gleixner <tglx@...utronix.de>
CommitDate: Thu, 15 Jan 2015 11:24:23 +0100

x86/apic: Correctly detect X2APIC status in function enable_IR()

X2APIC will be disabled if user specifies "nox2apic" on kernel command
line, even when x2apic_preenabled is true. So correctly detect X2APIC
status by using x2apic_enabled() instead of x2apic_preenabled.

Signed-off-by: Jiang Liu <jiang.liu@...ux.intel.com>
Cc: Tony Luck <tony.luck@...el.com>
Cc: iommu@...ts.linux-foundation.org
Cc: H. Peter Anvin <hpa@...ux.intel.com>
Cc: Joerg Roedel <joro@...tes.org>
Cc: Benjamin Herrenschmidt <benh@...nel.crashing.org>
Cc: Yinghai Lu <yinghai@...nel.org>
Cc: Borislav Petkov <bp@...en8.de>
Cc: David Rientjes <rientjes@...gle.com>
Cc: HATAYAMA Daisuke <d.hatayama@...fujitsu.com>
Cc: Jan Beulich <JBeulich@...e.com>
Cc: Richard Weinberger <richard@....at>
Cc: Oren Twaig <oren@...lemp.com>
Link: http://lkml.kernel.org/r/1420615903-28253-7-git-send-email-jiang.liu@linux.intel.com
Signed-off-by: Thomas Gleixner <tglx@...utronix.de>
---
 arch/x86/kernel/apic/apic.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 2dbd3a0..11358df 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -1581,7 +1581,7 @@ int __init enable_IR(void)
 		return -1;
 	}
 
-	if (!x2apic_preenabled && skip_ioapic_setup) {
+	if (!x2apic_enabled() && skip_ioapic_setup) {
 		pr_info("Skipped enabling intr-remap because of skipping "
 			"io-apic setup\n");
 		return -1;
--
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