Re: Different semantics for enable/disable IRQs

Linus Torvalds (torvalds@transmeta.com)
Tue, 31 Mar 1998 08:04:13 -0800 (PST)

On Mon, 30 Mar 1998, Oleg Subbotin wrote:
>
> Why is there a different semantics for enable/disable irq (in the case
> of SMP) for the old 8259A interrupt controller and for IOAPIC?.

Broken implementation reasons.

However, the fact is that it is a bug for the caller to not serialize the
enable/disable calls correctly anyway, so any code that shows this
implementation difference is to be considered broken anyway..

Linus

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