Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops

Alan Cox
2007-12-07T00:21:22Z

> Changing the delay instruction sequence from the outb to short jumps
> might be the safe thing. But Linus, et al. may have experience with
> that on other architectures like older Pentiums etc.

Post boot we can use udelay() for this. Earlier I guess we could use
udelay and make sure it starts "safe" before we know the timing.

Alan