--- x/mm/rmap.c
+++ y/mm/rmap.c
@@ -2283,6 +2283,7 @@ static bool try_to_migrate_one(struct fo
 	struct mm_struct *mm = vma->vm_mm;
 	DEFINE_FOLIO_VMA_WALK(pvmw, folio, vma, address, 0);
 	bool anon_exclusive, writable, ret = true;
+	int check_excl = 1;
 	pte_t pteval;
 	struct page *subpage;
 	struct mmu_notifier_range range;
@@ -2422,6 +2423,7 @@ static bool try_to_migrate_one(struct fo
 			if (pte_dirty(pteval))
 				folio_mark_dirty(folio);
 			writable = pte_write(pteval);
+			check_excl = 0;
 		} else if (likely(pte_present(pteval))) {
 			flush_cache_page(vma, address, pfn);
 			/* Nuke the page table entry. */
@@ -2446,10 +2448,17 @@ static bool try_to_migrate_one(struct fo
 		} else {
 			pte_clear(mm, address, pvmw.pte);
 			writable = is_writable_device_private_entry(pte_to_swp_entry(pteval));
+			check_excl = 0;
 		}
 
-		VM_WARN_ON_FOLIO(writable && folio_test_anon(folio) &&
-				!anon_exclusive, folio);
+		if (check_excl) {
+			pfn = pte_pfn(pteval);
+			subpage = folio_page(folio, pfn - folio_pfn(folio));
+			anon_exclusive = folio_test_anon(folio) &&
+					PageAnonExclusive(subpage);
+			VM_WARN_ON_FOLIO(writable && folio_test_anon(folio) &&
+					!anon_exclusive, folio);
+		}
 
 		/* Update high watermark before we lower rss */
 		update_hiwater_rss(mm);