[Intel-gfx] [PATCH 0/2] Low hanging fruit to reduce the driver size

[Daniel Vetter]

On Fri, Jul 11, 2014 at 06:34:12PM +0100, Damien Lespiau wrote:
> Being able to target a single platform to reduce the driver size has been
> voiced a few times. These patches provide a Kconfig option to provide the
> opportunity.
> 
> Let's start small, and, along side the generic "Multi-platform" option, only
> present Haswell and Broadwell in the list of platforms to choose from. When
> selecting any of those those two platforms, (S)DVO and MIPI DSI code is not
> compiled.
> 
> The driver .text size is reduced by 67Kb (8.8%) when selecting HSW/BDW.

Iirc my poor-man's-lto (include everything into one file) hack with a
similar scenario and hard-coding intel_info plus adding a few hacks to
help along gcc saved around 20-25% percent.

And I'm really not terribly convinced that kb shaving is worth the effort
overall, especially if it comes at a fairly steep maintainance burden of
piles of new config options and #defines.
-Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
+41 (0) 79 365 57 48 - http://blog.ffwll.ch