x86: introduce initmem_init for 32 bit

Signed-off-by: Yinghai Lu <yhlu.kernel@gmail.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/discontig_32.c b/arch/x86/mm/discontig_32.c
index a2f73ba..3e75be4 100644
--- a/arch/x86/mm/discontig_32.c
+++ b/arch/x86/mm/discontig_32.c
@@ -309,8 +309,8 @@
 		(ulong) node_remap_end_vaddr[nid]);
 }
 
-extern void setup_bootmem_allocator(void);
-unsigned long __init setup_memory(void)
+unsigned long __init initmem_init(unsigned long start_pfn,
+				  unsigned long end_pfn)
 {
 	int nid;
 	unsigned long system_start_pfn, system_max_low_pfn;