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Add comments describing parameter handling for ip6_insertfraghdr.

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Depending on compiler options, this code can be involved in an
(apparently) spurious compiler warning.  However, it was not
immediately obvious the the compiler was wrong.
This commit is contained in:
gdt 2012-07-21 14:52:40 +00:00
parent 8f3c15e2f4
commit b6bb903ff2
1 changed files with 6 additions and 2 deletions
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8
sys/netinet6/ip6_output.c
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@ -1,4 +1,4 @@
/* $NetBSD: ip6_output.c,v 1.149 2012/06/25 15:28:40 christos Exp $ */
/* $NetBSD: ip6_output.c,v 1.150 2012/07/21 14:52:40 gdt Exp $ */
/* $KAME: ip6_output.c,v 1.172 2001/03/25 09:55:56 itojun Exp $ */
/*
@ -62,7 +62,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: ip6_output.c,v 1.149 2012/06/25 15:28:40 christos Exp $");
__KERNEL_RCSID(0, "$NetBSD: ip6_output.c,v 1.150 2012/07/21 14:52:40 gdt Exp $");
#include "opt_inet.h"
#include "opt_inet6.h"
@ -1147,6 +1147,10 @@ ip6_insert_jumboopt(struct ip6_exthdrs *exthdrs, u_int32_t plen)
/*
* Insert fragment header and copy unfragmentable header portions.
*
* *frghdrp will not be read, and it is guaranteed that either an
* error is returned or that *frghdrp will point to space allocated
* for the fragment header.
*/
static int
ip6_insertfraghdr(struct mbuf *m0, struct mbuf *m, int hlen,