memory hotplug fix: fix section mismatch in vmammap_allock_block()

Fixes section mismatch below.

WARNING: vmlinux.o(.text+0x946b5): Section mismatch: reference to .init.text:'
__alloc_bootmem_node (between 'vmemmap_alloc_block' and 'vmemmap_pgd_populate')

Signed-off-by: KAMEZAWA Hiroyuki <kamezawa.hiroyu@jp.fujitsu.com>
Cc: Kamalesh Babulal <kamalesh@linux.vnet.ibm.com>
Cc: Andy Whitcroft <apw@shadowen.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>

mm/sparse-vmemmap.c

@@ -34,6 +34,16 @@
  * or to back the page tables that are used to create the mapping.
  * Uses the main allocators if they are available, else bootmem.
  */
+
+static void * __init_refok __earlyonly_bootmem_alloc(int node,
+				unsigned long size,
+				unsigned long align,
+				unsigned long goal)
+{
+	return __alloc_bootmem_node(NODE_DATA(node), size, align, goal);
+}
+
+
 void * __meminit vmemmap_alloc_block(unsigned long size, int node)
 {
 	/* If the main allocator is up use that, fallback to bootmem. */
@@ -44,7 +54,7 @@ void * __meminit vmemmap_alloc_block(unsigned long size, int node)
 			return page_address(page);
 		return NULL;
 	} else
-		return __alloc_bootmem_node(NODE_DATA(node), size, size,
+		return __earlyonly_bootmem_alloc(node, size, size,
 				__pa(MAX_DMA_ADDRESS));
 }