diff --git a/mm/sparse.c b/mm/sparse.c
index c7be019..6b5fb76 100644
--- a/mm/sparse.c
+++ b/mm/sparse.c
@@ -638,7 +638,6 @@
 got_map_page:
 	ret = (struct page *)pfn_to_kaddr(page_to_pfn(page));
 got_map_ptr:
-	memset(ret, 0, memmap_size);
 
 	return ret;
 }
@@ -758,6 +757,8 @@
 		goto out;
 	}
 
+	memset(memmap, 0, sizeof(struct page) * nr_pages);
+
 	ms->section_mem_map |= SECTION_MARKED_PRESENT;
 
 	ret = sparse_init_one_section(ms, section_nr, memmap, usemap);