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Date: Tue, 11 Sep 2007 16:50:45 -0500
From: Scott Wood <scottwood@freescale.com>
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To: Paul Mackerras <paulus@samba.org>
Subject: Re: [PATCH 2/3] pm: Handle HID0_SLEEP in the TLF_NAPPING hack.
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Paul Mackerras wrote:
> Scott Wood writes:
> 
>> The e300 core (and probably most other 6xx chips) can only come out of
>> sleep mode with an interrupt.  However, interrupts are logically disabled
>> by the power management layer.
>>
>> This hack extends the existing doze/nap hack to also suppress the running
>> of the interrupt handler when in sleep mode.
> 
> Having thought about this for a bit, I have come to the conclusion
> that it would be a lot cleaner to use a new TLF_SLEEPING bit rather
> than having to read HID0 to know whether we were napping or sleeping.
> There are plenty of bits left in thread_info.local_flags; we've only
> used 1 so far. :)

OK.

-Scott