x86: change kernel_physical_mapping_init() __init to __meminit

kernel_physical_mapping_init() could be called in memory hotplug path.

[ Impact: fix potential crash with memory hotplug ]

Signed-off-by: Shaohua Li <shaohua.li@intel.com>
LKML-Reference: <20090612045752.GA827@sli10-desk.sh.intel.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/arch/x86/mm/init_64.c b/arch/x86/mm/init_64.c
index 52bb951..52e1bff 100644
--- a/arch/x86/mm/init_64.c
+++ b/arch/x86/mm/init_64.c
@@ -527,7 +527,7 @@
 	return phys_pud_init(pud, addr, end, page_size_mask);
 }
 
-unsigned long __init
+unsigned long __meminit
 kernel_physical_mapping_init(unsigned long start,
 			     unsigned long end,
 			     unsigned long page_size_mask)