From owner-freebsd-arch@FreeBSD.ORG  Tue Jun  5 19:18:39 2012
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From: Adrian Chadd <adrian@freebsd.org>
To: Attilio Rao <attilio@freebsd.org>
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Subject: Re: KTR_SPAREx
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Hi,

I'm very tempted to make if_ath use KTR_DEV, but then have an extra
ath sysctl which does something like:

if (sc->sc_ktr_enable)
    KTR();



Adrian