Justin Hibbits 880870b41a Follow up r313841 on powerpc
Close a potential race in reading the CPU dtrace flags, where a thread can
start on one CPU, and partway through retrieving the flags be swapped out,
while another thread traps and sets the CPU_DTRACE_NOFAULT.  This could
cause the first thread to return without handling the fault.

Discussed with:	markj@
2017-06-09 20:26:42 +00:00
..
2017-06-09 20:26:42 +00:00