[PATCH] Lock mse(4)

This patch adds locking to mse(4) and marks it MPSAFE.  It also adds some 
other cleanups such as using bus_*() instead of bus_space_*() and 
consolidating duplicate copies of its detach routine.  The patch is against 
HEAD but probably applies to 9 and 10 as well.

http://people.freebsd.org/~jhb/patches/mse_locking.patch

-- 
John Baldwin