Man pages matching name probe::sunrpc.clnt.call_async in section 3stap:

probe::sunrpc.clnt.call_async.3stap.en	debian 10 / systemtap-doc
probe::sunrpc.clnt.call_async.3stap.en	debian 11 / systemtap-doc
probe::sunrpc.clnt.call_async.3stap.en	debian 12 / systemtap-doc