1 files changed, 9 insertions, 19 deletions

diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 3cf3d05b6bd4..e293c58bea58 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -694,6 +694,9 @@ static int move_freepages(struct zone *zone,
 #endif
 
         for (page = start_page; page <= end_page;) {
+                /* Make sure we are not inadvertently changing nodes */
+                VM_BUG_ON(page_to_nid(page) != zone_to_nid(zone));
+
                 if (!pfn_valid_within(page_to_pfn(page))) {
                         page++;
                         continue;
@@ -2516,6 +2519,10 @@ static void setup_zone_migrate_reserve(struct zone *zone)
                         continue;
                 page = pfn_to_page(pfn);
 
+                /* Watch out for overlapping nodes */
+                if (page_to_nid(page) != zone_to_nid(zone))
+                        continue;
+
                 /* Blocks with reserved pages will never free, skip them. */
                 if (PageReserved(page))
                         continue;
@@ -3753,23 +3760,6 @@ unsigned long __init find_min_pfn_with_active_regions(void)
         return find_min_pfn_for_node(MAX_NUMNODES);
 }
 
-/**
- * find_max_pfn_with_active_regions - Find the maximum PFN registered
- *
- * It returns the maximum PFN based on information provided via
- * add_active_range().
- */
-unsigned long __init find_max_pfn_with_active_regions(void)
-{
-        int i;
-        unsigned long max_pfn = 0;
-
-        for (i = 0; i < nr_nodemap_entries; i++)
-                max_pfn = max(max_pfn, early_node_map[i].end_pfn);
-
-        return max_pfn;
-}
-
 /*
  * early_calculate_totalpages()
  * Sum pages in active regions for movable zone.
@@ -4081,7 +4071,7 @@ void __init set_dma_reserve(unsigned long new_dma_reserve)
 }
 
 #ifndef CONFIG_NEED_MULTIPLE_NODES
-struct pglist_data contig_page_data = { .bdata = &bootmem_node_data[0] };
+struct pglist_data __refdata contig_page_data = { .bdata = &bootmem_node_data[0] };
 EXPORT_SYMBOL(contig_page_data);
 #endif
 
@@ -4454,7 +4444,7 @@ void *__init alloc_large_system_hash(const char *tablename,
         do {
                 size = bucketsize << log2qty;
                 if (flags & HASH_EARLY)
-                        table = alloc_bootmem(size);
+                        table = alloc_bootmem_nopanic(size);
                 else if (hashdist)
                         table = __vmalloc(size, GFP_ATOMIC, PAGE_KERNEL);
                 else {