Re: [PATCH] remove CONFIG_ANDROID

[Kalesh Singh]

On Wed, Jun 29, 2022 at 5:30 PM Jason A. Donenfeld <Jason@xxxxxxxxx> wrote:
>
> Hey again,
>
> On Thu, Jun 30, 2022 at 2:24 AM Jason A. Donenfeld <Jason@xxxxxxxxx> wrote:
> > 1) Introduce a simple CONFIG_PM_CONTINUOUS_AUTOSLEEPING Kconfig thing
> >    with lots of discouraging help text.
> >
> > 2) Go with the /sys/power tunable and bikeshed the naming of that a bit
> >    to get it to something that reflects this better, and document it as
> >    being undesirable except for Android phones.
>
> One other quick thought, which I had mentioned earlier to Kalesh:
>
> 3) Make the semantics a process holding open a file descriptor, rather
>    than writing 0/1 into a file. It'd be called /sys/power/
>    userspace_autosleep_ctrl, or something, and it'd enable this behavior
>    while it's opened. And maybe down the line somebody will want to add
>    ioctls to it for a different purpose. This way it's less of a tunable
>    and more of an indication that there's a userspace app doing/controlling
>    something.
>
> This idea (3) may be a lot of added complexity for basically nothing,
> but it might fit the usage semantics concerns a bit better than (2). But
> anyway, just an idea. Any one of those three are fine with me.

Two concerns John raised:
  1) Adding new ABI we need to maintain
  2) Having unclear config options

Another idea, I think, is to add the Kconfig option as
CONFIG_SUSPEND_SKIP_RNG_RESEED? Similar to existing
CONFIG_SUSPEND_SKIP_SYNC and I think it would address those concerns.

--Kalesh

> Jason