NAME

       function::stack - Return address at given depth of kernel stack backtrace

SYNOPSIS

           stack:long(n:long)

ARGUMENTS

       n
           number of levels to descend in the stack.

DESCRIPTION

       Performs a simple (kernel) backtrace, and returns the element at the specified position.
       The results of the backtrace itself are cached, so that the backtrace computation is
       performed at most once no matter how many times stack is called, or in what order.