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Date: Fri, 25 Aug 2017 14:13:47 -0700
From: Gleb Smirnoff <glebius@FreeBSD.org>
To: Sean Bruno <sbruno@FreeBSD.org>
Cc: src-committers@freebsd.org, svn-src-all@freebsd.org,
 svn-src-head@freebsd.org
Subject: Re: svn commit: r322900 - in head: . sys/netinet sys/sys
 usr.bin/netstat
Message-ID: <20170825211347.GO1071@FreeBSD.org>
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  Sean,

On Fri, Aug 25, 2017 at 07:41:38PM +0000, Sean Bruno wrote:
S> Modified: head/sys/netinet/tcp_var.h
S> ==============================================================================
S> --- head/sys/netinet/tcp_var.h	Fri Aug 25 19:06:36 2017	(r322899)
S> +++ head/sys/netinet/tcp_var.h	Fri Aug 25 19:41:38 2017	(r322900)
S> @@ -580,6 +580,11 @@ struct	tcpstat {
S>  	uint64_t tcps_sig_err_sigopt;	/* No signature expected by socket */
S>  	uint64_t tcps_sig_err_nosigopt;	/* No signature provided by segment */
S>  
S> +	/* Path MTU Discovery Black Hole Detection related stats */
S> +	uint64_t tcps_pmtud_blackhole_activated;	 /* Black Hole Count */
S> +	uint64_t tcps_pmtud_blackhole_activated_min_mss; /* BH at min MSS Count */
S> +	uint64_t tcps_pmtud_blackhole_failed;		 /* Black Hole Failure Count */
S> +
S>  	uint64_t _pad[12];		/* 6 UTO, 6 TBD */
S>  };

You may have used space in the _pad, and won't need to bump __FreeBSD_version
or update UPDATING.

This is what for these spares were made for :)

-- 
Totus tuus, Glebius.