devfs_clear_cdevpriv(9) on FreeBSD
The text 27a2e39808a2, as FreeBSD 14.5-RELEASE, FreeBSD 14.4-RELEASE, FreeBSD 14.3-RELEASE, FreeBSD 14.2-RELEASE, FreeBSD 14.1-RELEASE, FreeBSD 13.5-RELEASE, FreeBSD 13.4-RELEASE shipped it.
manage per-open filedescriptor data for devices