illumos/illumos-gate@e914ace2e9e914ace2e9https://www.illumos.org/issues/10343
On the openzfs feature/porting matrix, this is listed as:
prefix to refcount funcs/types
Having these changes will make it easier to share other work across the
different ZFS operating systems.
PR 7963 424fd7c3e Prefix all refcount functions with zfs_
PR 7885 & 7932 c13060e47 Linux 4.19-rc3+ compat: Remove refcount_t compat
PR 5823 & 5842 4859fe796 Linux 4.11 compat: avoid refcount_t name conflict
Author: Tim Schumacher <timschumi@gmx.de>
Obtained from: illumos, ZoL
MFC after: 3 weeks
6f2721b907