The signature given is int cpuset_getdomain(cpulevel_t level, cpuwhich_t which, id_t id, size_t setsize, domainet_t *mask, int *policy); where domainet_t should be domainset_t (missing 's'). Seen with 12.1 and online manpage.
A commit references this bug: Author: 0mp Date: Thu Jun 18 19:03:20 UTC 2020 New revision: 362336 URL: https://svnweb.freebsd.org/changeset/base/362336 Log: Fix a typo in cpuset_getdomain.2 PR: 247385 Reported by: Paul Floyd <paulf free.fr> MFC after: 1 week Changes: head/lib/libc/sys/cpuset_getdomain.2
Fixed, thanks a lot!
A commit references this bug: Author: 0mp Date: Sat Jun 27 14:14:00 UTC 2020 New revision: 362686 URL: https://svnweb.freebsd.org/changeset/base/362686 Log: MFC 362336: Fix a typo in cpuset_getdomain.2 PR: 247385 Reported by: Paul Floyd <paulf free.fr> Changes: _U stable/12/ stable/12/lib/libc/sys/cpuset_getdomain.2