dtc: Flexible tree checking infrastructure (v2)

[David Gibson]

On Mon, Nov 26, 2007 at 04:13:32PM -0600, Jon Loeliger wrote:
> So, like, the other day David Gibson mumbled:
> > dtc: Flexible tree checking infrastructure
> > 
> > Here, at last, is a substantial start on revising dtc's infrastructure
> > for checking the tree; this is the rework I've been saying was
> > necessary practically since dtc was first release.
> > 
> > In the new model, we have a table of "check" structures, each with a
> > name, references to checking functions, and status variables.  Each
> > check can (in principle) be individually switched off or on (as either
> > a warning or error).  Checks have a list of prerequisites, so if
> > checks need to rely on results from earlier checks to make sense (or
> > even to avoid crashing) they just need to list the relevant other
> > checks there.
> > 
> > For now, only the "structural" checks and the fixups for phandle
> > references are converted to the new mechanism.  The rather more
> > involved semantic checks (which is where this new mechanism will
> > really be useful) will have to be converted in future patches.
> > 
> > At present, there's no user interface for turning on/off the checks -
> > the -f option now forces output even if "error" level checks fail.
> > Again, future patches will be needed to add the fine-grained control,
> > but that should be quite straightforward with the infrastructure
> > implemented here.
> > 
> > Also adds a testcase for the handling of bad references, which catches
> > a bug encountered while developing this patch.
> > 
> > Signed-off-by: David Gibson <david at gibson.dropbear.id.au>
> 
> While I've Applied this one, it has introduced this:
> 
>          CC dtc.o
>     dtc.c: In function 'main':
>     dtc.c:199: warning: 'structure_ok' is used uninitialized in this function
> 
> Followup easy patch?

Crap.  For some reason my compiler isn't giving that warning, so I
missed that little bug :(.

I'm away at the moment, I'll see what I can do.

-- 
David Gibson			| I'll have my music baroque, and my code
david AT gibson.dropbear.id.au	| minimalist, thank you.  NOT _the_ _other_
				| _way_ _around_!
http://www.ozlabs.org/~dgibson