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-rw-r--r--mm/migrate_device.c8
1 files changed, 6 insertions, 2 deletions
diff --git a/mm/migrate_device.c b/mm/migrate_device.c
index 6fa682eef7a0..721b2365dbca 100644
--- a/mm/migrate_device.c
+++ b/mm/migrate_device.c
@@ -357,7 +357,8 @@ static bool migrate_vma_check_page(struct page *page, struct page *fault_page)
}
/*
- * Unmaps pages for migration. Returns number of unmapped pages.
+ * Unmaps pages for migration. Returns number of source pfns marked as
+ * migrating.
*/
static unsigned long migrate_device_unmap(unsigned long *src_pfns,
unsigned long npages,
@@ -373,8 +374,11 @@ static unsigned long migrate_device_unmap(unsigned long *src_pfns,
struct page *page = migrate_pfn_to_page(src_pfns[i]);
struct folio *folio;
- if (!page)
+ if (!page) {
+ if (src_pfns[i] & MIGRATE_PFN_MIGRATE)
+ unmapped++;
continue;
+ }
/* ZONE_DEVICE pages are not on LRU */
if (!is_zone_device_page(page)) {