[PATCH] drm: Micro-optimise drm_mm_for_each_node_in_range()

[Daniel Vetter]

On Mon, Feb 06, 2017 at 12:21:48PM +0200, Joonas Lahtinen wrote:
> On la, 2017-02-04 at 11:19 +0000, Chris Wilson wrote:
> > As we require valid start/end parameters, we can replace the initial
> > potential NULL with a pointer to the drm_mm.head_node and so reduce the
> > test on every iteration from a NULL + address comparison to just an
> > address comparison.
> > 
> > add/remove: 0/0 grow/shrink: 0/1 up/down: 0/-26 (-26)
> > function                                     old     new   delta
> > i915_gem_evict_for_node                      719     693     -26
> > 
> > (No other users outside of the test harness.)
> > 
> > Signed-off-by: Chris Wilson <chris at chris-wilson.co.uk>
> > Cc: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>
> 
> Slightly confused by the mixing of [start, end] and [start, end).
> 
> Reviewed-by: Joonas Lahtinen <joonas.lahtinen at linux.intel.com>

Applied to drm-misc-next for 4.12.

Thanks, Daniel
-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch