Ack: [SRU T/U/V] Fix vesafb performance regression

[Brad Figg]

On Tue, Apr 21, 2015 at 02:54:51PM +0200, Stefan Bader wrote:
> BugLink: http://bugs.launchpad.net/bugs/1434581
> 
> In a release long long ago, we modified vesafb to be compilable as
> a module. Starting with Oneiric the default mtrr setting was changed
> (apparently on maintainers advice) to write-combining. This way we
> probably still would boot merrily after if not for dropping the change
> to make vesafb a module between Saucy and Trusty. By then the mtrr
> change had been devoured by the module patch and so the framebuffer
> mapping was no longer cached by default.
> 
> Assuming that O->S was long enough to declare this stable, the attached
> patches re-introduce the new default. The only difference between the
> Trusty variant and the other is that vesafb.c got relocated.
> 
> -Stefan
> 
> 
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