K 10
svn:author
V 6
grehan
K 8
svn:date
V 27
2002-10-21T05:27:41.000000Z
K 7
svn:log
V 238
Add the USER_SR segment register to pcb state. Initialize correctly,
and save/restore during a context switch.

The USER_SR could be overwritten when the current thread was switched
out with a faulting copyin/copyout.

Approved by: Benno

END