Pumpkin Pie Salad

1 can pumpkin pie filling
1 (10 1/2 ounce) bag miniature marshmallows
1 cup walnuts, chopped
1 (12 ounce) container Cool Whip
1 small box vanilla pudding (add dry)
1 teaspoon cinnamon

In a bowl combine the Cool Whip and pie filling. Mix well. Add the remaining ingredients. Mix well. Refrigerate before serving.