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

NAME
function::atomic_long_read - Retrieves an atomic long variable from kernel memory
SYNOPSIS
atomic_long_read:long(addr:long)
ARGUMENTS
addr
pointer to atomic long variable
DESCRIPTION
Safely perform the read of an atomic long variable. This will be a NOP on kernels that do not have
ATOMIC_LONG_INIT set on the kernel config.
SystemTap Tapset Reference March 2016 FUNCTION::ATOMIC_LON(3stap)