/usr/share/man/man3/do_tracepoint.3.gz is in liblttng-ust-dev 2.10.1-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/share/man/man3/lttng-ust.3.gz
/usr/share/man/man3/lttng-ust.3.gz