0e3d68b2b4
This is similar to taskqueue_drain_all(9) but will wait for the queue to become idle before returning instead of only waiting for already-enqueued tasks to finish. This will be used in the opensolaris compat layer. PR: 227784 Reviewed by: cem MFC after: 1 week Sponsored by: The FreeBSD Foundation Differential Revision: https://reviews.freebsd.org/D17975