[Intel-gfx] [PATCH i-g-t v5] overlay: parse tracepoints from sysfs to figure out fields' location

[Chris Wilson]

Quoting Lionel Landwerlin (2017-12-19 14:26:11)
> With changes going to drm-tip, the tracepoints field locations are
> going to change. This change introduces a tracepoint parser (using a
> peg parser) which lets us figure out field positions on the fly.
> 
> v2: Fix automake build (Lionel)
> 
> v3: Make overlay build conditional on peg (Petri)
>     Make wait_end callback more readable (Chris)
>     Drop tracepoint_id(), instead parsing from format file (Lionel)
> 
> v4: Fix existing configure.ac issue with overlay build (Petri)
> 
> v5: Silence unused function (Lionel)
> 
> Signed-off-by: Lionel Landwerlin <lionel.g.landwerlin at intel.com>
> 
> For the build system changes:
> Acked-by: Petri Latvala <petri.latvala at intel.com>

If it works, it works.
Acked-by: Chris Wilson <chris at chris-wilson.co.uk>

One of the next steps would be failing if the tracepoint doesn't contain
the desired data.
-Chris