On 09-12-07 22:25, Pavel Machek wrote:
On Sun 2007-12-09 17:59:08, Andi Kleen wrote:
Yes, i guess switching to udelay at least on newer systems would be a good idea. I'm not quite sure about systems without TSC though.Something like this? (Warning, will not probably even compile on x86-64, I do not have 64-bit compiler near me).
static inline void native_io_delay(void)
{
- asm volatile("outb %%al,$0x80" : : : "memory");
+ udelay(8);
}
Alan, did you double-check that 8 us? I tried to but I seem to not have trustworthy documentation.
Rene. -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
- Follow-Ups:
- Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- From: Krzysztof Halasa <[email protected]>
- Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- References:
- RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- From: "David P. Reed" <[email protected]>
- Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- From: Andi Kleen <[email protected]>
- Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- From: Alan Cox <[email protected]>
- Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- From: Pavel Machek <[email protected]>
- Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- From: Andi Kleen <[email protected]>
- Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- From: Pavel Machek <[email protected]>
- RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- Prev by Date: [PATCH acs_ame scsi driver 000 of 1] Introduction
- Next by Date: Re: Please revert: PCI: fix IDE legacy mode resources
- Previous by thread: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- Next by thread: Re: RFC: outb 0x80 in inb_p, outb_p harmful on some modern AMD64 with MCP51 laptops
- Index(es):
 |