x86, numa: Avoid compiling NUMA emulation functions without CONFIG_NUMA_EMU

Both acpi_get_nodes() and amd_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 <[e-mail]>
LKML-Reference: <[e-mail]>
Signed-off-by: H. Peter Anvin <[e-mail]>

arch/x86/include/asm/acpi.h

···
 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)
 

arch/x86/include/asm/amd_nb.h

···
 extern int early_is_amd_nb(u32 value);
 extern int amd_cache_northbridges(void);
 extern void amd_flush_garts(void);
-extern int amd_get_nodes(struct bootnode *nodes);
 extern int amd_numa_init(unsigned long start_pfn, unsigned long end_pfn);
 extern int amd_scan_nodes(void);
+
+#ifdef CONFIG_NUMA_EMU
+extern int amd_get_nodes(struct bootnode *nodes);
+#endif
 
 struct amd_northbridge {
 	struct pci_dev *misc;

arch/x86/mm/amdtopology_64.c

···
 	early_init_lapic_mapping();
 }
 
+#ifdef CONFIG_NUMA_EMU
 int __init amd_get_nodes(struct bootnode *physnodes)
 {
 	int i;
···
 	}
 	return ret;
 }
+#endif /* CONFIG_NUMA_EMU */
 
 int __init amd_numa_init(unsigned long start_pfn, unsigned long end_pfn)
 {

arch/x86/mm/srat_64.c

···
 
 void __init acpi_numa_arch_fixup(void) {}
 
+#ifdef CONFIG_NUMA_EMU
 int __init acpi_get_nodes(struct bootnode *physnodes)
 {
 	int i;
···
 	}
 	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)