linux-kernel - [patch x86/mce] ACPI, x86: Export boot_cpu_physical

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Message-ID: <alpine.DEB.2.02.1311141504080.30112@chino.kir.corp.google.com>
Date:	Thu, 14 Nov 2013 15:05:32 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Ingo Molnar <mingo@...hat.com>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
cc:	Tony Luck <tony.luck@...el.com>,
	Chen Gong <gong.chen@...ux.intel.com>,
	"Rafael J. Wysocki" <rjw@...ysocki.net>, x86@...nel.org,
	linux-kernel@...r.kernel.org
Subject: [patch x86/mce] ACPI, x86: Export boot_cpu_physical_apicid to
 modules

"ACPI, x86: Fix extended error log driver to depend on CONFIG_X86_LOCAL_APIC" 
fixed a build error when CONFIG_X86_LOCAL_APIC was not selected and !CONFIG_SMP.
However, since CONFIG_ACPI_EXTLOG is tristate, there is a second build error:

ERROR: "boot_cpu_physical_apicid" [drivers/acpi/acpi_extlog.ko] undefined!

The symbol needs to be exported for it to be available.

Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 arch/x86/kernel/apic/apic.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -62,6 +62,7 @@ unsigned disabled_cpus;
 
 /* Processor that is doing the boot up */
 unsigned int boot_cpu_physical_apicid = -1U;
+EXPORT_SYMBOL(boot_cpu_physical_apicid);
 
 /*
  * The highest APIC ID seen during enumeration.
--
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