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 <rientjes@google.com>
LKML-Reference: <alpine.DEB.2.00.1012221701210.3701@chino.kir.corp.google.com>
Signed-off-by: H. Peter Anvin <hpa@linux.intel.com>

arch/x86/mm/amdtopology_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 amd_get_nodes(struct bootnode *physnodes)
 {
 	int i;
@@ -81,6 +82,7 @@ int __init amd_get_nodes(struct bootnode *physnodes)
 	}
 	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

@@ -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)