From owner-freebsd-current@FreeBSD.ORG  Wed May 24 14:38:45 2006
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From: des@des.no (Dag-Erling =?iso-8859-1?Q?Sm=F8rgrav?=)
To: "Yuriy Tsibizov" <Yuriy.Tsibizov@gfk.ru>
References: <D6B2C454E5A77B4D8DA0B863D3D6D492CC3458@demon.hhp.local>
Date: Wed, 24 May 2006 16:38:37 +0200
In-Reply-To: <D6B2C454E5A77B4D8DA0B863D3D6D492CC3458@demon.hhp.local> (Yuriy
	Tsibizov's message of "Wed, 24 May 2006 14:39:57 +0400")
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Cc: freebsd-multimedia@FreeBSD.org, Alexander@Leidinger.net,
	freebsd-current@FreeBSD.org, Warner Losh <imp@bsdimp.com>
Subject: Re: Call for testing: emu10kx driver for Creative sound cards
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"Yuriy Tsibizov" <Yuriy.Tsibizov@gfk.ru> writes:
> Should sound drivers (pcm* device) be documented as an exception
> from this?  They use snd_sysctl_tree_top() to get tree OID under
> hw.snd.pcmX and snd_sysctl_tree() to get their context.

They should probably switch to device_get_sysctl_*(), with some compat
glue to ease the transition.

If you remember to always pass the device's sysctl context to
SYSCTL_ADD_*() when you create the nodes, they will be GCed when the
device detaches (even if they are outside the device's sysctl subtree)

We should probably have per-class contexts as well, so stuff like
hw.snd.unit can be placed directly under dev.pcm.

DES
--=20
Dag-Erling Sm=F8rgrav - des@des.no