Rene Herman wrote:
Yes, we do. It's exactly this side effect which makes this safer than
either 0x80 or 0xED -- it's a port that *guaranteed* can't be
reclaimed for other purposes without breaking MS-DOS compatibility.
I see that with CR0.NE set (*) we indeed don't care about IGNNE#...
However, I'm worried about this comment in arch/x86/kernel/i8259_32.c
===
/*
* New motherboards sometimes make IRQ 13 be a PCI interrupt,
* so allow interrupt sharing.
*/
===
Is it really safe to just blindly negate IRQ13 on everything out there,
from regular PC through funky embedded thingies?
It's not any IRQ 13, it's IRQ 13 from the FPU.
-hpa
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