linux-kernel - [tip:x86/hyperv] x86, hyperv: Correctly guard the local APIC calibration code

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Date:	Thu, 10 Oct 2013 15:24:22 -0700
From:	"tip-bot for K. Y. Srinivasan" <tipbot@...or.com>
To:	linux-tip-commits@...r.kernel.org
Cc:	linux-kernel@...r.kernel.org, hpa@...or.com, mingo@...nel.org,
	kys@...rosoft.com, tglx@...utronix.de, hpa@...ux.intel.com
Subject: [tip:x86/hyperv] x86, hyperv:
  Correctly guard the local APIC calibration code

Commit-ID:  90ab9d5510932e146a9443bf5a591f95d5b5ada8
Gitweb:     http://git.kernel.org/tip/90ab9d5510932e146a9443bf5a591f95d5b5ada8
Author:     K. Y. Srinivasan <kys@...rosoft.com>
AuthorDate: Thu, 10 Oct 2013 15:30:24 -0700
Committer:  H. Peter Anvin <hpa@...ux.intel.com>
CommitDate: Thu, 10 Oct 2013 15:21:38 -0700

x86, hyperv: Correctly guard the local APIC calibration code

The code that gets the local APIC timer frequency from the hypervisor
rather depends on there being a local APIC.

Signed-off-by: K. Y. Srinivasan <kys@...rosoft.com>
Link: http://lkml.kernel.org/r/1381444224-3303-1-git-send-email-kys@microsoft.com
Signed-off-by: H. Peter Anvin <hpa@...ux.intel.com>
---
 arch/x86/kernel/cpu/mshyperv.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/arch/x86/kernel/cpu/mshyperv.c b/arch/x86/kernel/cpu/mshyperv.c
index 0a490ca..628ff50 100644
--- a/arch/x86/kernel/cpu/mshyperv.c
+++ b/arch/x86/kernel/cpu/mshyperv.c
@@ -80,6 +80,7 @@ static void __init ms_hyperv_init_platform(void)
 	printk(KERN_INFO "HyperV: features 0x%x, hints 0x%x\n",
 	       ms_hyperv.features, ms_hyperv.hints);
 
+#ifdef CONFIG_X86_LOCAL_APIC
 	if (ms_hyperv.features & HV_X64_MSR_APIC_FREQUENCY_AVAILABLE) {
 		/*
 		 * Get the APIC frequency.
@@ -99,6 +100,7 @@ static void __init ms_hyperv_init_platform(void)
 			legacy_pic = &null_legacy_pic;
 		}
 	}
+#endif
 
 	if (ms_hyperv.features & HV_X64_MSR_TIME_REF_COUNT_AVAILABLE)
 		clocksource_register_hz(&hyperv_cs, NSEC_PER_SEC/100);
--
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