K 10
svn:author
V 6
marcel
K 8
svn:date
V 27
2019-07-04T02:51:34.783490Z
K 7
svn:log
V 156
Lock busdma operations and serialize detach against open/close

Use sx to allow M_WAITOK allocations (suggested by markj).

admbugs: 782
Reviewed by:	markj

END