sound: Stop taking PCM_LOCK to create and destroy channels
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Authored by christos on Fri, Oct 9, 9:33 AM.

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Referenced Files

	F175296606: D60512.diff
	Fri, Oct 9, 6:26 PM

	F175296549: D60512.diff
	Fri, Oct 9, 6:26 PM

	F175280972: D60512.id189179.diff
	Fri, Oct 9, 4:15 PM

	F175277874: D60512.diff
	Fri, Oct 9, 4:04 PM

	F175275966: D60512.diff
	Fri, Oct 9, 3:54 PM

	F175265303: D60512.id189179.diff
	Fri, Oct 9, 1:56 PM

	F175251433: D60512.id189179.diff
	Fri, Oct 9, 10:48 AM

	F175245160: D60512.id189179.diff
	Fri, Oct 9, 9:42 AM

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Reviewers

markj
emaste
kib

Summary

chn_init() and chn_kill() took PCM_LOCK around the channel lists and the
per-direction counts, so that readers which cannot sleep could inspect
them. There are none left anymore, so drop it. The few remaining
unlocked readers never took the mutex in the first place.

MFC after: 2 weeks
Sponsored by: The FreeBSD Foundation