[PATCH hurd-dde 5/7] libmachdev: avoid malloc overhead when sending package

[Justus Winter]

* libmachdev/net.c (netif_rx_handle): Allocate message buffer on the
stack.
---
 libmachdev/net.c | 5 +----
 1 file changed, 1 insertion(+), 4 deletions(-)

diff --git a/libmachdev/net.c b/libmachdev/net.c
index 5a5cd5d..7ddf95d 100644
--- a/libmachdev/net.c
+++ b/libmachdev/net.c
@@ -232,9 +232,7 @@ netif_rx_handle (char *data, int len, struct net_device 
*dev)
   assert (nd);
 
   /* Allocate a kernel message buffer.  */
-  net_msg = malloc (sizeof (*net_msg));
-  if (!net_msg)
-    return;
+  net_msg = alloca (sizeof *net_msg);
 
   pack_size = len - sizeof (struct ethhdr);
   /* remember message sizes must be rounded up */
@@ -259,7 +257,6 @@ netif_rx_handle (char *data, int len, struct net_device 
*dev)
   net_msg->packet_type = packet_type;
   net_msg->net_rcv_msg_packet_count = ph->length;
   deliver_msg (net_msg, &nd->ifnet.port_list);
-  free (net_msg);
 }
 
 /* Mach device interface routines.  */
-- 
2.1.3