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From: Robert Watson <rwatson@FreeBSD.org>
Date: Sun, 5 Oct 2014 06:28:54 +0000 (UTC)
To: src-committers@freebsd.org, svn-src-all@freebsd.org,
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Subject: svn commit: r272559 - head/sys/netinet
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Author: rwatson
Date: Sun Oct  5 06:28:53 2014
New Revision: 272559
URL: https://svnweb.freebsd.org/changeset/base/272559

Log:
  Eliminate use of M_EXT in IP6_EXTHDR_CHECK() by trimming a redundant
  'if'/'else' case: it matches the simple 'else' case that follows.
  
  This reduces awareness of external-storage mechanics outside of the
  mbuf allocator.
  
  Reviewed by:	bz
  MFC after:	3 days
  Sponsored by:	EMC / Isilon Storage Division
  Differential Revision:	https://reviews.freebsd.org/D900

Modified:
  head/sys/netinet/ip6.h

Modified: head/sys/netinet/ip6.h
==============================================================================
--- head/sys/netinet/ip6.h	Sun Oct  5 06:06:48 2014	(r272558)
+++ head/sys/netinet/ip6.h	Sun Oct  5 06:28:53 2014	(r272559)
@@ -277,12 +277,6 @@ do {									\
 	    (((m) = m_pullup((m), (off) + (hlen))) == NULL)) {		\
 		IP6STAT_INC(ip6s_exthdrtoolong);				\
 		return ret;						\
-	} else if ((m)->m_flags & M_EXT) {				\
-		if ((m)->m_len < (off) + (hlen)) {			\
-			IP6STAT_INC(ip6s_exthdrtoolong);			\
-			m_freem(m);					\
-			return ret;					\
-		}							\
 	} else {							\
 		if ((m)->m_len < (off) + (hlen)) {			\
 			IP6STAT_INC(ip6s_exthdrtoolong);			\