shutdown via power button: "acpi: resumed at..."

[Nate Lawson]

Andriy Gapon wrote:
> I noticed that sometimes I am getting "acpi: resumed at..." message on console and
> in system log when I initiate system shutdown by pressing power button.
> I think that the cause is in acpi_UserNotify("Resume") call and this call is only
> found in acpi_EnterSleepState().
> 
> I see the following code in that function:
>     case ACPI_STATE_S5:
>         /*
>          * Shut down cleanly and power off.  This will call us back through the
>          * shutdown handlers.
>          */
>         shutdown_nice(RB_POWEROFF);
>         break;
> 
> So it seems that it is expected that shutdown_nice() would return immediately.
> I think it makes S5 a special case comparing to other states where return happens
> upon resuming from the state.
> In this case, maybe it is not necessary for S5 request to go through the
> resume/wakeup half of acpi_EnterSleepState.
> 

I thought shutdown*() should never return at all. It sounds like
interrupts are being re-enabled or something.

-- 
Nate