K 10
svn:author
V 5
markj
K 8
svn:date
V 27
2018-05-23T15:43:35.303675Z
K 7
svn:log
V 390
Add GET_STACK_USAGE() for arm64.

Its absence meant that GEOM direct dispatch was disabled (the service
routines check the current thread's stack usage to determine whether
to hand off the request to a dedicated thread), and this change is
sufficient to enable direct dispatch by default.

Reviewed by:	allanjude
MFC after:	2 weeks
Differential Revision:	https://reviews.freebsd.org/D15527

END