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

[tip-bot for Jiang Liu]

Commit-ID:  89356cf20ecb0b9975b1dad9ed605dd4c6e68bcd
Gitweb:     http://git.kernel.org/tip/89356cf20ecb0b9975b1dad9ed605dd4c6e68bcd
Author:     Jiang Liu <jiang.liu@xxxxxxxxxxxxxxx>
AuthorDate: Wed, 7 Jan 2015 15:31:33 +0800
Committer:  Thomas Gleixner <tglx@xxxxxxxxxxxxx>
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@xxxxxxxxxxxxxxx>
Cc: Tony Luck <tony.luck@xxxxxxxxx>
Cc: iommu@xxxxxxxxxxxxxxxxxxxxxxxxxx
Cc: H. Peter Anvin <hpa@xxxxxxxxxxxxxxx>
Cc: Joerg Roedel <joro@xxxxxxxxxx>
Cc: Benjamin Herrenschmidt <benh@xxxxxxxxxxxxxxxxxxx>
Cc: Yinghai Lu <yinghai@xxxxxxxxxx>
Cc: Borislav Petkov <bp@xxxxxxxxx>
Cc: David Rientjes <rientjes@xxxxxxxxxx>
Cc: HATAYAMA Daisuke <d.hatayama@xxxxxxxxxxxxxx>
Cc: Jan Beulich <JBeulich@xxxxxxxx>
Cc: Richard Weinberger <richard@xxxxxx>
Cc: Oren Twaig <oren@xxxxxxxxxxx>
Link: http://lkml.kernel.org/r/1420615903-28253-7-git-send-email-jiang.liu@xxxxxxxxxxxxxxx
Signed-off-by: Thomas Gleixner <tglx@xxxxxxxxxxxxx>
---
 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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