Nicolas,

On 07/27/2011 11:40 PM, Nicolas Pitre wrote:

On Wed, 27 Jul 2011, Rob Herring wrote:

quoted

From: Rob Herring <redacted>

This is a relatively simple way to remove the platform requirement for
some header files without making changes in every existing platform.
It's perhaps not a solution for the difficult cases, but can get the
simple cases out of the way making it clear what remains to be fixed.
I've done this for system.h and uncompress.h so far. timex.h and io.h
may be additional candidates.

I'm of two minds about this.  It is true that this makes things easy and 
would avoid some of the #ifdef'ery that is otherwise necessary.  On the 
other hand this gives us more opportunity for procrastinating and not 
really do a complete and thorough job.  It would also be easier for some 
platform to sneak in some of those header files to work around some 
shortcomings in the generic version which is not helping maintainers 
keeping a good discipline.  AS we are working on this, I might prefer 
that mistakes do break the build rather than silently causing a 
fallback with a dummy generic version to be picked up which might only 
cause problems at run time much later.

I just threw this out as an option.

I certainly view this as somewhat temporary, but just longer lived than
a single patch series and simpler that a bunch of temporary
HAVE_FOO_HEADER defines. Ultimately, the headers could just get rolled
into their parent asm header once all the platforms are converted over.
I don't view it as procrastinating, but allows platforms to be cleaned
up independently and spreads the work to others. The decision to move
gpio code into drivers/gpio is a good example. There was clear path and
it all went very quickly. It also allows focusing on the harder problems
while people are F2F.

A Linaro event is taking place next week in England where a focused 
effort will be deployed to work on this.  Let's see how much we'll be 
able to clean up.

Yes, I'm well aware of that. I'll participate remotely as much as I can.
Let me know how I can help.

Rob