793c381706
This API has no in-tree consumers at the moment but is useful to at least one out-of-tree consumer, and naturally complements existing vnode refcount functions (vholdl(9), vdropl(9)). Obtained from: kib (sys/ portion) Sponsored by: EMC / Isilon Storage Division Differential Revision: https://reviews.freebsd.org/D4947 Differential Revision: https://reviews.freebsd.org/D4953