1 files changed, 6 insertions, 2 deletions

diff --git a/arch/powerpc/mm/mem.c b/arch/powerpc/mm/mem.c
index e2c95fcb8055..4bd7b0a70996 100644
--- a/arch/powerpc/mm/mem.c
+++ b/arch/powerpc/mm/mem.c
@@ -200,6 +200,8 @@ void show_mem(void)
                 unsigned long flags;
                 pgdat_resize_lock(pgdat, &flags);
                 for (i = 0; i < pgdat->node_spanned_pages; i++) {
+                        if (!pfn_valid(pgdat->node_start_pfn + i))
+                                continue;
                         page = pgdat_page_nr(pgdat, i);
                         total++;
                         if (PageHighMem(page))
@@ -336,7 +338,7 @@ void __init mem_init(void)
         struct page *page;
         unsigned long reservedpages = 0, codesize, initsize, datasize, bsssize;
 
-        num_physpages = max_pfn;        /* RAM is assumed contiguous */
+        num_physpages = lmb.memory.size >> PAGE_SHIFT;
         high_memory = (void *) __va(max_low_pfn * PAGE_SIZE);
 
 #ifdef CONFIG_NEED_MULTIPLE_NODES
@@ -348,11 +350,13 @@ void __init mem_init(void)
                 }
         }
 #else
-        max_mapnr = num_physpages;
+        max_mapnr = max_pfn;
         totalram_pages += free_all_bootmem();
 #endif
         for_each_pgdat(pgdat) {
                 for (i = 0; i < pgdat->node_spanned_pages; i++) {
+                        if (!pfn_valid(pgdat->node_start_pfn + i))
+                                continue;
                         page = pgdat_page_nr(pgdat, i);
                         if (PageReserved(page))
                                 reservedpages++;