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Diffstat (limited to 'mm/memory_hotplug.c')
-rw-r--r--mm/memory_hotplug.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 3b62a9ff8ea0..f307bd82d750 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -331,7 +331,7 @@ static unsigned long find_smallest_section_pfn(int nid, struct zone *zone,
unsigned long end_pfn)
{
for (; start_pfn < end_pfn; start_pfn += PAGES_PER_SUBSECTION) {
- if (unlikely(!pfn_valid(start_pfn)))
+ if (unlikely(!pfn_to_online_page(start_pfn)))
continue;
if (unlikely(pfn_to_nid(start_pfn) != nid))
@@ -356,7 +356,7 @@ static unsigned long find_biggest_section_pfn(int nid, struct zone *zone,
/* pfn is the end pfn of a memory section. */
pfn = end_pfn - 1;
for (; pfn >= start_pfn; pfn -= PAGES_PER_SUBSECTION) {
- if (unlikely(!pfn_valid(pfn)))
+ if (unlikely(!pfn_to_online_page(pfn)))
continue;
if (unlikely(pfn_to_nid(pfn) != nid))
@@ -415,7 +415,7 @@ static void shrink_zone_span(struct zone *zone, unsigned long start_pfn,
*/
pfn = zone_start_pfn;
for (; pfn < zone_end_pfn; pfn += PAGES_PER_SUBSECTION) {
- if (unlikely(!pfn_valid(pfn)))
+ if (unlikely(!pfn_to_online_page(pfn)))
continue;
if (page_zone(pfn_to_page(pfn)) != zone)
@@ -471,6 +471,16 @@ static void __remove_zone(struct zone *zone, unsigned long start_pfn,
struct pglist_data *pgdat = zone->zone_pgdat;
unsigned long flags;
+#ifdef CONFIG_ZONE_DEVICE
+ /*
+ * Zone shrinking code cannot properly deal with ZONE_DEVICE. So
+ * we will not try to shrink the zones - which is okay as
+ * set_zone_contiguous() cannot deal with ZONE_DEVICE either way.
+ */
+ if (zone_idx(zone) == ZONE_DEVICE)
+ return;
+#endif
+
pgdat_resize_lock(zone->zone_pgdat, &flags);
shrink_zone_span(zone, start_pfn, start_pfn + nr_pages);
update_pgdat_span(pgdat);