[issue727] unloading sound driver panics box

Tue Jul 10 13:04:21 PDT 2007

Matthew Dillon wrote:
Matthew Dillon <dillon at apollo.backplane.com> added the comment:

:
:we should switch back to spinlocks and maybe sync the sound code to FreeBSD-7.
    We can't use spinlocks in that code.  FreeBSD assumes they are sleepable
    mutexes so we have to use lockmgr locks (which are basically the same
    thing).
actually it assumes so only in one place, the uaudio driver, and this is even a bug which has been fixed in freebsd-7.  so i'd say let's sacrifice uaudio (seems our only consumer didn't come back) and make the rest work properly.

cheers
 simon
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