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-rw-r--r--mm/page_alloc.c5
1 files changed, 2 insertions, 3 deletions
diff --git a/mm/page_alloc.c b/mm/page_alloc.c
index d66bc8abe0af..17a39d40a556 100644
--- a/mm/page_alloc.c
+++ b/mm/page_alloc.c
@@ -5853,6 +5853,7 @@ void __ref memmap_init_zone_device(struct zone *zone,
{
unsigned long pfn, end_pfn = start_pfn + size;
struct pglist_data *pgdat = zone->zone_pgdat;
+ struct vmem_altmap *altmap = pgmap_altmap(pgmap);
unsigned long zone_idx = zone_idx(zone);
unsigned long start = jiffies;
int nid = pgdat->node_id;
@@ -5865,9 +5866,7 @@ void __ref memmap_init_zone_device(struct zone *zone,
* of the pages reserved for the memmap, so we can just jump to
* the end of that region and start processing the device pages.
*/
- if (pgmap->altmap_valid) {
- struct vmem_altmap *altmap = &pgmap->altmap;
-
+ if (altmap) {
start_pfn = altmap->base_pfn + vmem_altmap_offset(altmap);
size = end_pfn - start_pfn;
}