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CVS commit: [netbsd-8] src/sys/dev

Module Name:    src
Committed By:   snj
Date:           Sat Sep 23 17:13:10 UTC 2017

Modified Files:
        src/sys/dev [netbsd-8]: audio.c audiovar.h

Log Message:
Pull up following revision(s) (requested by isaki in ticket #278):
        sys/dev/audiovar.h: revision 1.61-1.62
        sys/dev/audiovar.h: revision 1.63 via patch
        sys/dev/audio.c: revision 1.381, 1.390, 1.391, 1.393
        sys/dev/audio.c: revision 1.394 via patch
Use do .. while (0) for macros.
Introduce audio_destroy_pfilters()/audio_destroy_rfilters()
and use it.
Remove dead codes. chan will never be NULL in SIMPLEQ_FOREACH.
Move defines to the appropriate place.
Remove mixer chan from sc_audiochan.
Now sc_audiochan contains opened audio chan (and first special
element) only.
First I splitted sc_audiochan into sc_audiochan which has
audio chan (and first special element) and sc_mixerchan
which has mixer chan only.  However nobody else refers this
sc_mixerchan except additions to list and deletions from
list.  So mixer chan's list is not necessary.
Split the first special element from sc_audiochan list.
- This makes sc_audiochan a list of only open audio chan.
- "SIMPLEQ_FIRST(&sc->sc_audiochan)->vc" is now "sc->hwvc".
No functional changes (except one debug message).

To generate a diff of this commit:
cvs rdiff -u -r1.357.2.7 -r1.357.2.8 src/sys/dev/audio.c
cvs rdiff -u -r1.55.2.2 -r1.55.2.3 src/sys/dev/audiovar.h

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.

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