svn commit: r316206 - head/sys/sys

[Adrian Chadd]

Author: adrian
Date: Thu Mar 30 02:34:21 2017
New Revision: 316206
URL: https://svnweb.freebsd.org/changeset/base/316206

Log:
  [mbufq] add a concat method.
  
  Reviewed by:	gnn, ae, glebius
  Approved by:	ae, glebius
  Differential Revision:	https://reviews.freebsd.org/D10158

Modified:
  head/sys/sys/mbuf.h

Modified: head/sys/sys/mbuf.h
==============================================================================
--- head/sys/sys/mbuf.h	Thu Mar 30 02:32:38 2017	(r316205)
+++ head/sys/sys/mbuf.h	Thu Mar 30 02:34:21 2017	(r316206)
@@ -1320,5 +1320,18 @@ mbufq_prepend(struct mbufq *mq, struct m
 	STAILQ_INSERT_HEAD(&mq->mq_head, m, m_stailqpkt);
 	mq->mq_len++;
 }
+
+/*
+ * Note: this doesn't enforce the maximum list size for dst.
+ */
+static inline void
+mbufq_concat(struct mbufq *mq_dst, struct mbufq *mq_src)
+{
+
+	mq_dst->mq_len += mq_src->mq_len;
+	STAILQ_CONCAT(&mq_dst->mq_head, &mq_src->mq_head);
+	mq_src->mq_len = 0;
+}
+
 #endif /* _KERNEL */
 #endif /* !_SYS_MBUF_H_ */