Fixes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/4081 Reviewed-by: Adam Jackson <ajax@redhat.com> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/15058>
Based on <linux/sync_file.h> with BSD portability conditional. At least FreeBSD supports SYNC_IOC_* via LinuxKPI in DRM. Reviewed-by: Jason Ekstrand <jason@jlekstrand.net> Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5463>