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-rw-r--r--include/linux/mmzone.h3
-rw-r--r--mm/memory_hotplug.c15
-rw-r--r--mm/page_alloc.c11
3 files changed, 24 insertions, 5 deletions
diff --git a/include/linux/mmzone.h b/include/linux/mmzone.h
index 652673ea92f1..e82fc1a52cd0 100644
--- a/include/linux/mmzone.h
+++ b/include/linux/mmzone.h
@@ -333,6 +333,9 @@ void wakeup_kswapd(struct zone *zone, int order);
int zone_watermark_ok(struct zone *z, int order, unsigned long mark,
int classzone_idx, int alloc_flags);
+extern int init_currently_empty_zone(struct zone *zone, unsigned long start_pfn,
+ unsigned long size);
+
#ifdef CONFIG_HAVE_MEMORY_PRESENT
void memory_present(int nid, unsigned long start, unsigned long end);
#else
diff --git a/mm/memory_hotplug.c b/mm/memory_hotplug.c
index 70df5c0d957e..71da5c98c9c1 100644
--- a/mm/memory_hotplug.c
+++ b/mm/memory_hotplug.c
@@ -26,7 +26,7 @@
extern void zonetable_add(struct zone *zone, int nid, int zid, unsigned long pfn,
unsigned long size);
-static void __add_zone(struct zone *zone, unsigned long phys_start_pfn)
+static int __add_zone(struct zone *zone, unsigned long phys_start_pfn)
{
struct pglist_data *pgdat = zone->zone_pgdat;
int nr_pages = PAGES_PER_SECTION;
@@ -34,8 +34,15 @@ static void __add_zone(struct zone *zone, unsigned long phys_start_pfn)
int zone_type;
zone_type = zone - pgdat->node_zones;
+ if (!populated_zone(zone)) {
+ int ret = 0;
+ ret = init_currently_empty_zone(zone, phys_start_pfn, nr_pages);
+ if (ret < 0)
+ return ret;
+ }
memmap_init_zone(nr_pages, nid, zone_type, phys_start_pfn);
zonetable_add(zone, nid, zone_type, phys_start_pfn, nr_pages);
+ return 0;
}
extern int sparse_add_one_section(struct zone *zone, unsigned long start_pfn,
@@ -50,7 +57,11 @@ static int __add_section(struct zone *zone, unsigned long phys_start_pfn)
if (ret < 0)
return ret;
- __add_zone(zone, phys_start_pfn);
+ ret = __add_zone(zone, phys_start_pfn);
+
+ if (ret < 0)
+ return ret;
+
return register_new_memory(__pfn_to_section(phys_start_pfn));
}
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index 5ae75bead4df..4bc66f6b7718 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -2050,8 +2050,9 @@ static __meminit void zone_pcp_init(struct zone *zone)
zone->name, zone->present_pages, batch);
}
-static __meminit void init_currently_empty_zone(struct zone *zone,
- unsigned long zone_start_pfn, unsigned long size)
+__meminit int init_currently_empty_zone(struct zone *zone,
+ unsigned long zone_start_pfn,
+ unsigned long size)
{
struct pglist_data *pgdat = zone->zone_pgdat;
@@ -2063,6 +2064,8 @@ static __meminit void init_currently_empty_zone(struct zone *zone,
memmap_init(size, pgdat->node_id, zone_idx(zone), zone_start_pfn);
zone_init_free_lists(pgdat, zone, zone->spanned_pages);
+
+ return 0;
}
/*
@@ -2077,6 +2080,7 @@ static void __meminit free_area_init_core(struct pglist_data *pgdat,
unsigned long j;
int nid = pgdat->node_id;
unsigned long zone_start_pfn = pgdat->node_start_pfn;
+ int ret;
pgdat_resize_init(pgdat);
pgdat->nr_zones = 0;
@@ -2118,7 +2122,8 @@ static void __meminit free_area_init_core(struct pglist_data *pgdat,
continue;
zonetable_add(zone, nid, j, zone_start_pfn, size);
- init_currently_empty_zone(zone, zone_start_pfn, size);
+ ret = init_currently_empty_zone(zone, zone_start_pfn, size);
+ BUG_ON(ret);
zone_start_pfn += size;
}
}