On Friday, 27 April 2007 11:41, Johannes Berg wrote:
> On Thu, 2007-04-26 at 21:02 +0200, Rafael J. Wysocki wrote:
>
> > Yes. That's because we want to be able to repeat creating the image
> > without closing the fd in some situations.
>
> Oh yeah, I just checked and it's not in fact necessary. I'm just
> confused.
>
> > Still, we could use a global var 'platform_hibernation' or something like this,
> > I think. Then, we can do
> >
> > #define platform_hibernation 0
> >
> > on the architectures that don't need it and make ACPI use it instead of this
> > "dynamic linking".
>
> No, because acpi doesn't know at build time whether it can actually do
> S4 or not.
That's not a problem, I think.
1) We define platform_hibernation if CONFIG_ACPI is set.
2) In the ACPI code we do
if (can do S4)
platform_hibernation = 1;
3) We have functions arch_platform_prepare()/finish()/enter() that are defined
to be noops for anything but ACPI systems and for ACPI systems they are
defined like this:
int arch_platform_enter(void)
{
if (!platform_hibernation)
return 0;
...
}
I think it should work.
Greetings,
Rafael
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