[PATCH] fix pte_chain leak in do_no_page()

From: "V. Rajesh" <vrajesh@eecs.umich.edu>

Fix a rare pte_chain memory leak in do_no_page()

mm/memory.c

@@ -1441,6 +1441,7 @@ do_no_page(struct mm_struct *mm, struct vm_area_struct *vma,
 		sequence = atomic_read(&mapping->truncate_count);
 		spin_unlock(&mm->page_table_lock);
 		page_cache_release(new_page);
+		pte_chain_free(pte_chain);
 		goto retry;
 	}
 	page_table = pte_offset_map(pmd, address);