David E. O'Brien 06a6074bb0 Fix a problem where we were switching npxproc from underneath processes
running in process context in order to run interrupt handlers.  This
caused a big smashing of the stack on AMD K6, K5 and Intel Pentium (ie, P5)
processors because we are using npxproc as a flag to indicate whether
the state has been pushed onto the stack.

Submitted by:	bde
2001-03-24 08:27:57 +00:00
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