svn commit: r192535 - head/sys/kern

[M. Warner Losh]

In message: <3bbf2fe10905211511g53defb6cmac45fc2469cc64f at mail.gmail.com>
            Attilio Rao <attilio at freebsd.org> writes:
: At this point I wonder what's the purpose of maintaining the sleeping
: version for such functions?

As John explained, destroy_dev() needs to sleep to flush all the
threads out of the driver callbacks.

Warner