Provided by: systemtap-doc_2.3-1ubuntu1.4_all 

NAME
function::user_ushort_warn - Retrieves an unsigned short value stored in user space
SYNOPSIS
user_ushort_warn:long(addr:long)
ARGUMENTS
addr
the user space address to retrieve the unsigned short from
DESCRIPTION
Returns the unsigned short value from a given user space address. Returns zero when user space and warns
(but does not abort) about the failure.
SystemTap Tapset Reference March 2016 FUNCTION::USER_USHOR(3stap)