adj = adj_get(ai);
adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE;
fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx);
adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE;
adj = adj_get(ai);
adj->ia_flags |= ADJ_FLAG_SYNC_WALK_ACTIVE;
fib_walk_sync(FIB_NODE_TYPE_ADJ, ai, &bw_ctx);
adj->ia_flags &= ~ADJ_FLAG_SYNC_WALK_ACTIVE;