Index: uspace/lib/packet/generic/packet_server.c
===================================================================
--- uspace/lib/packet/generic/packet_server.c	(revision c81b6f22157e856a3500cbdf031cc5acfd0348e6)
+++ uspace/lib/packet/generic/packet_server.c	(revision 6118ccafe4554d379ec5acedeab74b2887a5dbe2)
@@ -135,6 +135,4 @@
 /** Creates a new packet of dimensions at least as given.
  *
- * Should be used only when the global data are locked.
- *
  * @param[in] length	The total length of the packet, including the header,
  *			the addresses and the data of the packet.
@@ -153,4 +151,6 @@
 	packet_t *packet;
 	int rc;
+
+	assert(fibril_mutex_is_locked(&ps_globals.lock));
 
 	// already locked
@@ -233,6 +233,4 @@
 /** Release the packet and returns it to the appropriate free packet queue.
  *
- * Should be used only when the global data are locked.
- *
  * @param[in] packet	The packet to be released.
  *
@@ -242,4 +240,6 @@
 	int index;
 	int result;
+
+	assert(fibril_mutex_is_locked(&ps_globals.lock));
 
 	for (index = 0; (index < FREE_QUEUES_COUNT - 1) &&