x86-64, NUMA: Kill {acpi|amd|dummy}_scan_nodes()

They are empty now.  Kill them.
Signed-off-by: Tejun Heo <tj@kernel.org>
Cc: Yinghai Lu <yinghai@kernel.org>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Cyrill Gorcunov <gorcunov@gmail.com>
Cc: Shaohui Zheng <shaohui.zheng@intel.com>
Cc: David Rientjes <rientjes@google.com>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: H. Peter Anvin <hpa@linux.intel.com>

arch/x86/include/asm/acpi.h

@@ -186,7 +186,6 @@ struct bootnode;
 #ifdef CONFIG_ACPI_NUMA
 extern int acpi_numa;
 extern int x86_acpi_numa_init(void);
-extern int acpi_scan_nodes(void);
 
 #ifdef CONFIG_NUMA_EMU
 extern void acpi_fake_nodes(const struct bootnode *fake_nodes,

arch/x86/include/asm/amd_nb.h

@@ -17,7 +17,6 @@ extern int early_is_amd_nb(u32 value);
 extern int amd_cache_northbridges(void);
 extern void amd_flush_garts(void);
 extern int amd_numa_init(void);
-extern int amd_scan_nodes(void);
 extern int amd_get_subcaches(int);
 extern int amd_set_subcaches(int, int);
 

arch/x86/mm/amdtopology_64.c

@@ -259,8 +259,3 @@ void __init amd_fake_nodes(const struct bootnode *nodes, int nr_nodes)
 	memcpy(__apicid_to_node, fake_apicid_to_node, sizeof(__apicid_to_node));
 }
 #endif /* CONFIG_NUMA_EMU */
-
-int __init amd_scan_nodes(void)
-{
-	return 0;
-}

arch/x86/mm/numa_64.c

@@ -772,25 +772,17 @@ static int dummy_numa_init(void)
 	return 0;
 }
 
-static int dummy_scan_nodes(void)
-{
-	return 0;
-}
-
 void __init initmem_init(void)
 {
 	int (*numa_init[])(void) = { [2] = dummy_numa_init };
-	int (*scan_nodes[])(void) = { [2] = dummy_scan_nodes };
 	int i, j;
 
 	if (!numa_off) {
 #ifdef CONFIG_ACPI_NUMA
 		numa_init[0] = x86_acpi_numa_init;
-		scan_nodes[0] = acpi_scan_nodes;
 #endif
 #ifdef CONFIG_AMD_NUMA
 		numa_init[1] = amd_numa_init;
-		scan_nodes[1] = amd_scan_nodes;
 #endif
 	}
 
@@ -834,9 +826,6 @@ void __init initmem_init(void)
 		if (numa_register_memblks() < 0)
 			continue;
 
-		if (scan_nodes[i]() < 0)
-			continue;
-
 		for (j = 0; j < nr_cpu_ids; j++) {
 			int nid = early_cpu_to_node(j);
 

arch/x86/mm/srat_64.c

@@ -270,14 +270,6 @@ int __init x86_acpi_numa_init(void)
 	return srat_disabled() ? -EINVAL : 0;
 }
 
-/* Use the information discovered above to actually set up the nodes. */
-int __init acpi_scan_nodes(void)
-{
-	if (acpi_numa <= 0)
-		return -1;
-	return 0;
-}
-
 #ifdef CONFIG_NUMA_EMU
 static int fake_node_to_pxm_map[MAX_NUMNODES] __initdata = {
 	[0 ... MAX_NUMNODES-1] = PXM_INVAL