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Subject[tip:x86/numa] x86: Fix build failure on X86_UP_APIC
Commit-ID:  4e62445b90ac4ef708bd11c7ae052b1d5ef765b5
Gitweb: http://git.kernel.org/tip/4e62445b90ac4ef708bd11c7ae052b1d5ef765b5
Author: Tejun Heo <tj@kernel.org>
AuthorDate: Fri, 28 Jan 2011 17:22:48 +0100
Committer: Ingo Molnar <mingo@elte.hu>
CommitDate: Fri, 28 Jan 2011 17:24:49 +0100

x86: Fix build failure on X86_UP_APIC

Commit 4c321ff8 (x86: Replace cpu_2_logical_apicid[] with early
percpu variable) and following changes introduced and used
x86_cpu_to_logical_apicid percpu variable. It was declared and
defined inside CONFIG_SMP && CONFIG_X86_32 but if
CONFIG_X86_UP_APIC is set UP configuration makes use of it and
build fails.

Fix it by declaring and defining it inside CONFIG_X86_LOCAL_APIC
&& CONFIG_X86_32.

Signed-off-by: Tejun Heo <tj@kernel.org>
Reported-by: Ingo Molnar <mingo@elte.hu>
Cc: eric.dumazet@gmail.com
Cc: yinghai@kernel.org
Cc: brgerst@gmail.com
Cc: gorcunov@gmail.com
Cc: penberg@kernel.org
Cc: shaohui.zheng@intel.com
Cc: rientjes@google.com
LKML-Reference: <20110128162248.GA25746@htj.dyndns.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
---
arch/x86/include/asm/smp.h | 2 +-
arch/x86/kernel/apic/apic.c | 2 --
2 files changed, 1 insertions(+), 3 deletions(-)

diff --git a/arch/x86/include/asm/smp.h b/arch/x86/include/asm/smp.h
index dc7c46a..7592782 100644
--- a/arch/x86/include/asm/smp.h
+++ b/arch/x86/include/asm/smp.h
@@ -38,7 +38,7 @@ static inline struct cpumask *cpu_core_mask(int cpu)

DECLARE_EARLY_PER_CPU(u16, x86_cpu_to_apicid);
DECLARE_EARLY_PER_CPU(u16, x86_bios_cpu_apicid);
-#if defined(CONFIG_SMP) && defined(CONFIG_X86_32)
+#if defined(CONFIG_X86_LOCAL_APIC) && defined(CONFIG_X86_32)
DECLARE_EARLY_PER_CPU(int, x86_cpu_to_logical_apicid);
#endif

diff --git a/arch/x86/kernel/apic/apic.c b/arch/x86/kernel/apic/apic.c
index 4686ea5..1390cf9 100644
--- a/arch/x86/kernel/apic/apic.c
+++ b/arch/x86/kernel/apic/apic.c
@@ -79,7 +79,6 @@ EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);

#ifdef CONFIG_X86_32

-#ifdef CONFIG_SMP
/*
* On x86_32, the mapping between cpu and logical apicid may vary
* depending on apic in use. The following early percpu variable is
@@ -87,7 +86,6 @@ EXPORT_EARLY_PER_CPU_SYMBOL(x86_bios_cpu_apicid);
* actually diverge. Let's keep it ugly for now.
*/
DEFINE_EARLY_PER_CPU(int, x86_cpu_to_logical_apicid, BAD_APICID);
-#endif

/*
* Knob to control our willingness to enable the local APIC.

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