Author: glebius
Date: Fri Jan 6 08:46:26 2012
New Revision: 229690
URL: http://svn.freebsd.org/changeset/base/229690
Log:
Merge r226830 from head/:
Add macro IF_DEQUEUE_ALL(ifq, m), that takes the entire mbuf chain off
the queue. It can be utilized in queue processing to avoid multiple
locking/unlocking.
Modified:
stable/9/sys/net/if_var.h
Directory Properties:
stable/9/sys/ (props changed)
Modified: stable/9/sys/net/if_var.h
==============================================================================
--- stable/9/sys/net/if_var.h Fri Jan 6 05:51:00 2012 (r229689)
+++ stable/9/sys/net/if_var.h Fri Jan 6 08:46:26 2012 (r229690)
@@ -321,6 +321,18 @@ void if_maddr_runlock(struct ifnet *ifp)
IF_UNLOCK(ifq); \
} while (0)
+#define _IF_DEQUEUE_ALL(ifq, m) do { \
+ (m) = (ifq)->ifq_head; \
+ (ifq)->ifq_head = (ifq)->ifq_tail = NULL; \
+ (ifq)->ifq_len = 0; \
+} while (0)
+
+#define IF_DEQUEUE_ALL(ifq, m) do { \
+ IF_LOCK(ifq); \
+ _IF_DEQUEUE_ALL(ifq, m); \
+ IF_UNLOCK(ifq); \
+} while (0)
+
#define _IF_POLL(ifq, m) ((m) = (ifq)->ifq_head)
#define IF_POLL(ifq, m) _IF_POLL(ifq, m)
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