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-rw-r--r--mm/migrate.c7
1 files changed, 7 insertions, 0 deletions
diff --git a/mm/migrate.c b/mm/migrate.c
index 896e9cd49ecc..c40075d48ef9 100644
--- a/mm/migrate.c
+++ b/mm/migrate.c
@@ -2947,6 +2947,13 @@ static void migrate_vma_insert_page(struct migrate_vma *migrate,
swp_entry = make_device_private_entry(page, vma->vm_flags & VM_WRITE);
entry = swp_entry_to_pte(swp_entry);
+ } else {
+ /*
+ * For now we only support migrating to un-addressable
+ * device memory.
+ */
+ pr_warn_once("Unsupported ZONE_DEVICE page type.\n");
+ goto abort;
}
} else {
entry = mk_pte(page, vma->vm_page_prot);