> /* protect from the user area from user accesses. :-)
> addr -> addr + UPAGES*NBPG don't seem to be protected without
> this; the rest seems to be OK, and doesn't like being protected
> - andrew@werple.apana.org.au */
*is* necessary, so put it back in... it's in an #ifdef i386 part anyway.
is effected in useracc(), and also by a vm_protect() in vm_fork() for i386
CPUs. Without the latter a write to the user area, say USRSTACK+1000,
would hang a 386-based system.