i8259.c spinlocks unnecessary

Cort Dougan cort at fsmlabs.com
Sat Jun 29 07:29:29 EST 2002

I looked through the 8259 code and I believe the spinlocks there are
unnecessary.  The code is covered by a spinlock when called from irq.c.

I instrumented the code and after running quite some time my code review
matches what I've seen.

Anyone comment?  Does someone want to remove them?

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