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From: "Bjoern A. Zeeb" <bz@FreeBSD.org>
Date: Fri, 25 May 2012 02:21:18 +0000 (UTC)
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Subject: svn commit: r235960 - head/sys/net
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Author: bz
Date: Fri May 25 02:21:17 2012
New Revision: 235960
URL: http://svn.freebsd.org/changeset/base/235960

Log:
  MFp4 bz_ipv6_fast:
  
    Simple yet effective change enabling checksum "offload" on loopback
    for IPv6 to avoid expensive computations.
  
    Sponsored by:	The FreeBSD Foundation
    Sponsored by:	iXsystems
  
  Reviewed by:	gnn (as part of the whole)
  MFC After:	3 days

Modified:
  head/sys/net/if_loop.c

Modified: head/sys/net/if_loop.c
==============================================================================
--- head/sys/net/if_loop.c	Fri May 25 02:19:17 2012	(r235959)
+++ head/sys/net/if_loop.c	Fri May 25 02:21:17 2012	(r235960)
@@ -247,12 +247,12 @@ looutput(struct ifnet *ifp, struct mbuf 
 #if 1	/* XXX */
 	switch (dst->sa_family) {
 	case AF_INET:
+	case AF_INET6:
 		if (ifp->if_capenable & IFCAP_RXCSUM) {
 			m->m_pkthdr.csum_data = 0xffff;
 			m->m_pkthdr.csum_flags = LO_CSUM_SET;
 		}
 		m->m_pkthdr.csum_flags &= ~LO_CSUM_FEATURES;
-	case AF_INET6:
 	case AF_IPX:
 	case AF_APPLETALK:
 		break;