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From: "Bjoern A. Zeeb" <bz@FreeBSD.org>
Date: Sun, 8 Jul 2012 12:01:11 +0000 (UTC)
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Subject: svn commit: r238236 - stable/9/sys/net
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Author: bz
Date: Sun Jul  8 12:01:11 2012
New Revision: 238236
URL: http://svn.freebsd.org/changeset/base/238236

Log:
  MFC r235960:
  
     Simple yet effective change enabling checksum "offload" on loopback
     for IPv6 to avoid expensive computations.
  
  Approved by:	re

Modified:
  stable/9/sys/net/if_loop.c
Directory Properties:
  stable/9/sys/   (props changed)

Modified: stable/9/sys/net/if_loop.c
==============================================================================
--- stable/9/sys/net/if_loop.c	Sun Jul  8 11:57:11 2012	(r238235)
+++ stable/9/sys/net/if_loop.c	Sun Jul  8 12:01:11 2012	(r238236)
@@ -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;