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diff --git a/lib/librte_eal/common/eal_common_launch.c b/lib/librte_eal/common/eal_common_launch.c
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+/*-
+ * BSD LICENSE
+ *
+ * Copyright(c) 2010-2012 Intel Corporation. All rights reserved.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ *
+ * * Redistributions of source code must retain the above copyright
+ * notice, this list of conditions and the following disclaimer.
+ * * Redistributions in binary form must reproduce the above copyright
+ * notice, this list of conditions and the following disclaimer in
+ * the documentation and/or other materials provided with the
+ * distribution.
+ * * Neither the name of Intel Corporation nor the names of its
+ * contributors may be used to endorse or promote products derived
+ * from this software without specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+ * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+ * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+ * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+ * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+ * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+ * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+ * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+ * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+ * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+ * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+ *
+ * version: DPDK.L.1.2.3-3
+ */
+
+#include <errno.h>
+#include <stdint.h>
+#include <stdio.h>
+#include <sys/queue.h>
+
+#include <rte_launch.h>
+#include <rte_memory.h>
+#include <rte_memzone.h>
+#include <rte_tailq.h>
+#include <rte_eal.h>
+#include <rte_atomic.h>
+#include <rte_per_lcore.h>
+#include <rte_lcore.h>
+
+/*
+ * Wait until a lcore finished its job.
+ */
+int
+rte_eal_wait_lcore(unsigned slave_id)
+{
+ if (lcore_config[slave_id].state == WAIT)
+ return 0;
+
+ while (lcore_config[slave_id].state != WAIT &&
+ lcore_config[slave_id].state != FINISHED);
+
+ rte_rmb();
+
+ /* we are in finished state, go to wait state */
+ lcore_config[slave_id].state = WAIT;
+ return lcore_config[slave_id].ret;
+}
+
+/*
+ * Check that every SLAVE lcores are in WAIT state, then call
+ * rte_eal_remote_launch() for all of them. If call_master is true
+ * (set to CALL_MASTER), also call the function on the master lcore.
+ */
+int
+rte_eal_mp_remote_launch(int (*f)(void *), void *arg,
+ enum rte_rmt_call_master_t call_master)
+{
+ int lcore_id;
+ int master = rte_get_master_lcore();
+
+ /* check state of lcores */
+ RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+ if (lcore_config[lcore_id].state != WAIT)
+ return -EBUSY;
+ }
+
+ /* send messages to cores */
+ RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+ rte_eal_remote_launch(f, arg, lcore_id);
+ }
+
+ if (call_master == CALL_MASTER) {
+ lcore_config[master].ret = f(arg);
+ lcore_config[master].state = FINISHED;
+ }
+
+ return 0;
+}
+
+/*
+ * Return the state of the lcore identified by slave_id.
+ */
+enum rte_lcore_state_t
+rte_eal_get_lcore_state(unsigned lcore_id)
+{
+ return lcore_config[lcore_id].state;
+}
+
+/*
+ * Do a rte_eal_wait_lcore() for every lcore. The return values are
+ * ignored.
+ */
+void
+rte_eal_mp_wait_lcore(void)
+{
+ unsigned lcore_id;
+
+ RTE_LCORE_FOREACH_SLAVE(lcore_id) {
+ rte_eal_wait_lcore(lcore_id);
+ }
+}
+