dev/sound/pcm/* patch testers wanted

[Don Lewis]

On 26 Jan, Gordon Bergling wrote:

> The "Danger!" message wasn't appeared, but I got the following on the
> console.
> 
> malloc() of "1024" with the following non-sleepable locks held:
> exclusive sleep mutex pcm0:play:0 (pcm play channel) r = 0 (0xc2be8a80)
> locked @
> /storage/os/src/freebsd-current/src/sys/dev/sound/pcm/buffer.c:195
> malloc() of "4096" with the following non-sleepable locks held:
> exclusive sleep mutex pcm0:play:0 (pcm play channel) r = 0 (0xc2be8a80)
> locked @
> /storage/os/src/freebsd-current/src/sys/dev/sound/pcm/buffer.c:195

A stack trace would be helpful so that we know where malloc() was being
called.  I've got a hunch, though.  What hardware specific driver are
you using?