Re: linux-next: build failure after merge of the tip tree
From: Len Brown
Date: Mon Jan 20 2014 - 16:40:05 EST
> As a side note, at minimum the semantic and compatibility difference
> needs to be _very_ clearly present in the naming. Something like
> mwait_old_() or mwait_core2_(). That way such dependencies and
> assumptions don't get lost in code restructuring, etc.
We started with mwait_idle() -- which was erroneously removed
and is now being restored under it original name.
The "new" function is mwait_idle_with_hints() -- which uses
the additional hints that were not available w/ the original MWAIT instruction.
Where "new" is Core Duo and later -- all the processor that can use
MWAIT for C-states deeper than C1.
Len Brown, Intel Open Source Technology Center
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