Messages in this thread |  | | | Date | Wed, 2 Jan 2008 11:00:41 +0100 | | From | Ingo Molnar <> | | Subject | Re: [PATCH] x86: provide a DMI based port 0x80 I/O delay override. | |
* H. Peter Anvin <hpa@zytor.com> wrote:
> Christer Weinigel wrote:
>>
>> out 80h, al is only two bytes. Any alternative that has been suggested
>> in this discussion will use more space. mov dx, alt_port; out dx, al
>> will be larger, a function call will definitely be a lot larger. People
>> have been making changes to the kernel to save a couple of hundred
>> bytes of text size.
>>
>
> If text size becomes a problem in this case, then we can use an
> alternatives-like mechanism to fix up the kernel. However,
> realistically this probably should be a function call *combined with*
> the out and in; that reduces the impact somewhat.
and that's exactly what x86.git#mm does now.
Ingo
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