diff --git a/include/linux/filter.h b/include/linux/filter.h
index 447a775..35db44a 100644
--- a/include/linux/filter.h
+++ b/include/linux/filter.h
@@ -124,7 +124,8 @@ struct sock_fprog {	/* Required for SO_ATTACH_FILTER. */
 #define SKF_AD_MARK 	20
 #define SKF_AD_QUEUE	24
 #define SKF_AD_HATYPE	28
-#define SKF_AD_MAX	32
+#define SKF_AD_CPU	32
+#define SKF_AD_MAX	36
 #define SKF_NET_OFF   (-0x100000)
 #define SKF_LL_OFF    (-0x200000)
 
diff --git a/net/core/filter.c b/net/core/filter.c
index a44d27f..3baa3f7 100644
--- a/net/core/filter.c
+++ b/net/core/filter.c
@@ -410,6 +410,9 @@ load_b:
 				A = 0;
 			continue;
 		}
+		case SKF_AD_CPU:
+			A = raw_smp_processor_id();
+			continue;
 		default:
 			return 0;
 		}