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-rw-r--r--mm/memory_hotplug.c45
1 files changed, 19 insertions, 26 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 9c12ae5e3695..1cbe9579e233 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -161,14 +161,27 @@ static void grow_pgdat_span(struct pglist_data *pgdat,
pgdat->node_start_pfn;
}
-int online_pages(unsigned long pfn, unsigned long nr_pages)
+static int online_pages_range(unsigned long start_pfn, unsigned long nr_pages,
+ void *arg)
{
unsigned long i;
+ unsigned long onlined_pages = *(unsigned long *)arg;
+ struct page *page;
+ if (PageReserved(pfn_to_page(start_pfn)))
+ for (i = 0; i < nr_pages; i++) {
+ page = pfn_to_page(start_pfn + i);
+ online_page(page);
+ onlined_pages++;
+ }
+ *(unsigned long *)arg = onlined_pages;
+ return 0;
+}
+
+
+int online_pages(unsigned long pfn, unsigned long nr_pages)
+{
unsigned long flags;
unsigned long onlined_pages = 0;
- struct resource res;
- u64 section_end;
- unsigned long start_pfn;
struct zone *zone;
int need_zonelists_rebuild = 0;
@@ -191,28 +204,8 @@ int online_pages(unsigned long pfn, unsigned long nr_pages)
if (!populated_zone(zone))
need_zonelists_rebuild = 1;
- res.start = (u64)pfn << PAGE_SHIFT;
- res.end = res.start + ((u64)nr_pages << PAGE_SHIFT) - 1;
- res.flags = IORESOURCE_MEM; /* we just need system ram */
- section_end = res.end;
-
- while ((res.start < res.end) && (find_next_system_ram(&res) >= 0)) {
- start_pfn = (unsigned long)(res.start >> PAGE_SHIFT);
- nr_pages = (unsigned long)
- ((res.end + 1 - res.start) >> PAGE_SHIFT);
-
- if (PageReserved(pfn_to_page(start_pfn))) {
- /* this region's page is not onlined now */
- for (i = 0; i < nr_pages; i++) {
- struct page *page = pfn_to_page(start_pfn + i);
- online_page(page);
- onlined_pages++;
- }
- }
-
- res.start = res.end + 1;
- res.end = section_end;
- }
+ walk_memory_resource(pfn, nr_pages, &onlined_pages,
+ online_pages_range);
zone->present_pages += onlined_pages;
zone->zone_pgdat->node_present_pages += onlined_pages;