linux-kernel - [patch 2/5] x86: avoid compiling NUMA emulation functions without CONFIG_NUMA

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Date:	Wed, 1 Dec 2010 17:36:20 -0800 (PST)
From:	David Rientjes <rientjes@...gle.com>
To:	Ingo Molnar <mingo@...e.hu>, "H. Peter Anvin" <hpa@...or.com>,
	Thomas Gleixner <tglx@...utronix.de>
cc:	x86@...nel.org, linux-kernel@...r.kernel.org
Subject: [patch 2/5] x86: avoid compiling NUMA emulation functions without
 CONFIG_NUMA_EMU

Both acpi_get_nodes() and k8_get_nodes() are only necessary when
CONFIG_NUMA_EMU is enabled, so avoid compiling them when the option is
disabled.

Signed-off-by: David Rientjes <rientjes@...gle.com>
---
 arch/x86/include/asm/acpi.h   |    5 ++++-
 arch/x86/include/asm/amd_nb.h |    5 ++++-
 arch/x86/mm/k8topology_64.c   |    2 ++
 arch/x86/mm/srat_64.c         |    2 ++
 4 files changed, 12 insertions(+), 2 deletions(-)

diff --git a/arch/x86/include/asm/acpi.h b/arch/x86/include/asm/acpi.h
--- a/arch/x86/include/asm/acpi.h
+++ b/arch/x86/include/asm/acpi.h
@@ -188,14 +188,17 @@ extern int acpi_numa;
 extern int acpi_get_nodes(struct bootnode *physnodes);
 extern int acpi_scan_nodes(unsigned long start, unsigned long end);
 #define NR_NODE_MEMBLKS (MAX_NUMNODES*2)
+
+#ifdef CONFIG_NUMA_EMU
 extern void acpi_fake_nodes(const struct bootnode *fake_nodes,
 				   int num_nodes);
+#endif
 #else
 static inline void acpi_fake_nodes(const struct bootnode *fake_nodes,
 				   int num_nodes)
 {
 }
-#endif
+#endif /* CONFIG_ACPI_NUMA */
 
 #define acpi_unlazy_tlb(x)	leave_mm(x)
 
diff --git a/arch/x86/include/asm/amd_nb.h b/arch/x86/include/asm/amd_nb.h
--- a/arch/x86/include/asm/amd_nb.h
+++ b/arch/x86/include/asm/amd_nb.h
@@ -9,10 +9,13 @@ struct bootnode;
 extern int early_is_k8_nb(u32 value);
 extern int cache_k8_northbridges(void);
 extern void k8_flush_garts(void);
-extern int k8_get_nodes(struct bootnode *nodes);
 extern int k8_numa_init(unsigned long start_pfn, unsigned long end_pfn);
 extern int k8_scan_nodes(void);
 
+#ifdef CONFIG_NUMA_EMU
+extern int k8_get_nodes(struct bootnode *nodes);
+#endif
+
 struct k8_northbridge_info {
 	u16 num;
 	u8 gart_supported;
diff --git a/arch/x86/mm/k8topology_64.c b/arch/x86/mm/k8topology_64.c
--- a/arch/x86/mm/k8topology_64.c
+++ b/arch/x86/mm/k8topology_64.c
@@ -69,6 +69,7 @@ static __init void early_get_boot_cpu_id(void)
 	early_init_lapic_mapping();
 }
 
+#ifdef CONFIG_NUMA_EMU
 int __init k8_get_nodes(struct bootnode *physnodes)
 {
 	int i;
@@ -81,6 +82,7 @@ int __init k8_get_nodes(struct bootnode *physnodes)
 	}
 	return ret;
 }
+#endif /* CONFIG_NUMA_EMU */
 
 int __init k8_numa_init(unsigned long start_pfn, unsigned long end_pfn)
 {
diff --git a/arch/x86/mm/srat_64.c b/arch/x86/mm/srat_64.c
--- a/arch/x86/mm/srat_64.c
+++ b/arch/x86/mm/srat_64.c
@@ -339,6 +339,7 @@ static int __init nodes_cover_memory(const struct bootnode *nodes)
 
 void __init acpi_numa_arch_fixup(void) {}
 
+#ifdef CONFIG_NUMA_EMU
 int __init acpi_get_nodes(struct bootnode *physnodes)
 {
 	int i;
@@ -351,6 +352,7 @@ int __init acpi_get_nodes(struct bootnode *physnodes)
 	}
 	return ret;
 }
+#endif /* CONFIG_NUMA_EMU */
 
 /* Use the information discovered above to actually set up the nodes. */
 int __init acpi_scan_nodes(unsigned long start, unsigned long end)
--
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