Re: linux-next: build failure after merge of the tip tree

Len Brown
2014-01-20T21:39:49Z

> 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.

Agreed.
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