[linux-pm] [RFC PATCH v4] ARM hibernation/suspend-to-disk support

[frank.hofmann@tomtom.com (Frank Hofmann)]

On Fri, 10 Jun 2011, Russell King - ARM Linux wrote:

[ ... ]
> What's the point when platform code has *ALREADY* to call these functions?
>
> Is it really too sodding difficult for platforms to do:
>
> my_suspend_hook()
> {
> 	mach_pre_suspend_hook();
> 	cpu_suspend();
> 	mach_post_suspend_hook();
> }
>
> ?
>
> <not read the rest of the message, this is getting idiotic>
>

Sorry for being unclear.

Yes, they already have to do all this. And they should.


Except for one thing:

They all, IN ADDITION, do ALSO:

 	wfi();			/* or whatever else to power down */


For Hibernation, _THAT_ needs to be out of the codepath.


So that one can snapshot without powering down.

FrankH.