1 files changed, 4 insertions, 0 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3acb216e9a78..755c99a0ac71 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -69,6 +69,7 @@ EXPORT_SYMBOL(node_states);
 
 unsigned long totalram_pages __read_mostly;
 unsigned long totalreserve_pages __read_mostly;
+unsigned long highest_memmap_pfn __read_mostly;
 int percpu_pagelist_fraction;
 
 #ifdef CONFIG_HUGETLB_PAGE_SIZE_VARIABLE
@@ -2597,6 +2598,9 @@ void __meminit memmap_init_zone(unsigned long size, int nid, unsigned long zone,
         unsigned long pfn;
         struct zone *z;
 
+        if (highest_memmap_pfn < end_pfn - 1)
+                highest_memmap_pfn = end_pfn - 1;
+
         z = &NODE_DATA(nid)->node_zones[zone];
         for (pfn = start_pfn; pfn < end_pfn; pfn++) {
                 /*