Re: [PARPORT] parport-diff-980111

Philip Blundell (
Wed, 14 Jan 1998 23:07:37 +0000

>So cli() don' t mask well critical code that can be managed also from
>others CPU, right? cli() clear interrupts only on the CPU that executed
>cli(), or no?

No - cli() must mask interrupts on all CPUs for compatibility with
uniprocessor. This involves sending IPIs to all processors and so it's
expensive - the spinlock approach is more efficient.


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