diff --git a/[refs] b/[refs]
index cdb555f25c8a..86700bb1c6df 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 8e6dafd6c741cd4679b4de3c5d9698851e4fa59c
+refs/heads/master: ecda06289f8202d4c6beb235f59ea464f4a91209
diff --git a/trunk/arch/x86/kernel/mpparse.c b/trunk/arch/x86/kernel/mpparse.c
index 7f4d2586972e..37cb1bda1baf 100644
--- a/trunk/arch/x86/kernel/mpparse.c
+++ b/trunk/arch/x86/kernel/mpparse.c
@@ -710,13 +710,22 @@ static int __init smp_scan_config(unsigned long base, unsigned long length,
 				 * of physical memory; so that simply reserving
 				 * PAGE_SIZE from mpf->physptr yields BUG()
 				 * in reserve_bootmem.
+				 * also need to make sure physptr is below than
+				 * max_low_pfn
+				 * we don't need reserve the area above max_low_pfn
 				 */
 				unsigned long end = max_low_pfn * PAGE_SIZE;
-				if (mpf->physptr + size > end)
-					size = end - mpf->physptr;
-#endif
+
+				if (mpf->physptr < end) {
+					if (mpf->physptr + size > end)
+						size = end - mpf->physptr;
+					reserve_bootmem_generic(mpf->physptr, size,
+							BOOTMEM_DEFAULT);
+				}
+#else
 				reserve_bootmem_generic(mpf->physptr, size,
 						BOOTMEM_DEFAULT);
+#endif
 			}
 
 			return 1;