hwmon: (sht15) remove multiple driver registration

[cascardo/linux.git] / mm / memory_hotplug.c

diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 3ad25f9..6a5b90d 100644 (file)
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -126,9 +126,6 @@ static void register_page_bootmem_info_section(unsigned long start_pfn)
        struct mem_section *ms;
        struct page *page, *memmap;
 
-       if (!pfn_valid(start_pfn))
-               return;
-
        section_nr = pfn_to_section_nr(start_pfn);
        ms = __nr_to_section(section_nr);
 
@@ -187,9 +184,16 @@ void register_page_bootmem_info_node(struct pglist_data *pgdat)
        end_pfn = pfn + pgdat->node_spanned_pages;
 
        /* register_section info */
-       for (; pfn < end_pfn; pfn += PAGES_PER_SECTION)
-               register_page_bootmem_info_section(pfn);
-
+       for (; pfn < end_pfn; pfn += PAGES_PER_SECTION) {
+               /*
+                * Some platforms can assign the same pfn to multiple nodes - on
+                * node0 as well as nodeN.  To avoid registering a pfn against
+                * multiple nodes we check that this pfn does not already
+                * reside in some other node.
+                */
+               if (pfn_valid(pfn) && (pfn_to_nid(pfn) == node))
+                       register_page_bootmem_info_section(pfn);
+       }
 }
 #endif /* !CONFIG_SPARSEMEM_VMEMMAP */