K 10
svn:author
V 3
jhb
K 8
svn:date
V 27
2014-11-18T21:51:01.512800Z
K 7
svn:log
V 357
Add locking to mcd(4) and mark MPSAFE.
- Actually use existing per-softc mutex.
- Use mutex in cdev routines and remove D_NEEDGIANT.
- Use callout(9) instead of timeout(9).
- Don't check for impossible conditions (e.g. MCDINIT being clear).
- Remove critical_enter/exit when sending a PIO command.
- Use bus_*() instead of bus_space_*().

Tested by:	no one

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