Re: Linux 2.4.13-ac4

Alan Cox
2001-10-29T10:50:05Z

> bytes read from the 8254 get swapped. I've got some indirect evidence
> that this also could happen with the original i8254.

Im hoping not. That would imply we interrupted someone half way through
reading the counter which means the locking is screwed up.

> By the way, if we made the 8254 accesses (spinlock?) protected (which
> should be done anyway, right now definitely more than one CPU can access
> the registers at once), I think we could remove the outb(0, 0x43);,
> saving some cycles.

Some chipsets need the outb