+#define RTE_LCORE_FOREACH_SLAVE(l) \
+ RTE_DEPRECATED(RTE_LCORE_FOREACH_SLAVE) RTE_LCORE_FOREACH_WORKER(l)
+
+/**
+ * Callback prototype for initializing lcores.
+ *
+ * @param lcore_id
+ * The lcore to consider.
+ * @param arg
+ * An opaque pointer passed at callback registration.
+ * @return
+ * - -1 when refusing this operation,
+ * - 0 otherwise.
+ */
+typedef int (*rte_lcore_init_cb)(unsigned int lcore_id, void *arg);
+
+/**
+ * Callback prototype for uninitializing lcores.
+ *
+ * @param lcore_id
+ * The lcore to consider.
+ * @param arg
+ * An opaque pointer passed at callback registration.
+ */
+typedef void (*rte_lcore_uninit_cb)(unsigned int lcore_id, void *arg);
+
+/**
+ * Register callbacks invoked when initializing and uninitializing a lcore.
+ *
+ * This function calls the init callback with all initialized lcores.
+ * Any error reported by the init callback triggers a rollback calling the
+ * uninit callback for each lcore.
+ * If this step succeeds, the callbacks are put in the lcore callbacks list
+ * that will get called for each lcore allocation/release.
+ *
+ * Note: callbacks execution is serialised under a write lock protecting the
+ * lcores and callbacks list.
+ *
+ * @param name
+ * A name serving as a small description for this callback.
+ * @param init
+ * The callback invoked when a lcore_id is initialized.
+ * init can be NULL.
+ * @param uninit
+ * The callback invoked when a lcore_id is uninitialized.
+ * uninit can be NULL.
+ * @param arg
+ * An optional argument that gets passed to the callback when it gets
+ * invoked.
+ * @return
+ * On success, returns an opaque pointer for the registered object.
+ * On failure (either memory allocation issue in the function itself or an
+ * error is returned by the init callback itself), returns NULL.
+ */
+__rte_experimental
+void *
+rte_lcore_callback_register(const char *name, rte_lcore_init_cb init,
+ rte_lcore_uninit_cb uninit, void *arg);
+
+/**
+ * Unregister callbacks previously registered with rte_lcore_callback_register.
+ *
+ * This function calls the uninit callback with all initialized lcores.
+ * The callbacks are then removed from the lcore callbacks list.
+ *
+ * @param handle
+ * The handle pointer returned by a former successful call to
+ * rte_lcore_callback_register.
+ */
+__rte_experimental
+void
+rte_lcore_callback_unregister(void *handle);
+