+ if (PREDICT_FALSE (~0 == sa0->decrypt_thread_index))
+ {
+ /* this is the first packet to use this SA, claim the SA
+ * for this thread. this could happen simultaneously on
+ * another thread */
+ clib_atomic_cmp_and_swap (&sa0->decrypt_thread_index, ~0,
+ ipsec_sa_assign_thread (thread_index));
+ }
+
+ if (PREDICT_TRUE (thread_index != sa0->decrypt_thread_index))
+ {
+ next[0] = AH_DECRYPT_NEXT_HANDOFF;
+ goto next;
+ }
+