kib 11ea0b8f38 Restore release semantic for the old thread unlock on arm64.
With the introduction of pmap_switch(), the DSB instruction on the
address map switch is not necessary executed, which is fixed by
changing the unlock store to release.  Also remove comment which
documented pre-pmap_switch() code.

Reviewed by:	andrew
Sponsored by:	The FreeBSD Foundation
MFC after:	1 week
2018-06-08 18:32:26 +00:00
..
2018-06-08 05:48:36 +00:00
2018-06-08 05:40:36 +00:00
2018-06-08 05:40:36 +00:00
2018-03-24 21:30:24 +00:00
2018-06-08 05:40:36 +00:00
2018-05-25 08:44:00 +00:00