In the non-SA world, the proc-dependent flags are inherited from
the parent in cpu_fork().  In the SA world, the flags are split
between LWP-specific and proc-specific.  ISTM that current
implementations of cpu_fork() do ensure the inheritance of the
LWP-specific flags, but the proc-specific flags are not
initialised and usually filled with junk.  The symptoms I saw
where corrupted page tables on NetBSD/hp300.

Since cpu_fork() doesn't know whether it is handling a process
fork or an LWP fork, who is responsible for maintaing proc-specific
flags?

	-- Gregory McGarry <g.mcgarry@ieee.org>