Re: mm: new mm hook framework

[Andrew Morton]

On Thu, 25 Jun 2015 10:42:45 +0200 Laurent Dufour <ldufour@xxxxxxxxxxxxxxxxxx> wrote:

> > IMHO this screams for the generic version in include/asm-generic/,
> > and "generic-y += mm-arch-hooks.h" in arch/*/include/asm/Kbuild/.
> 
> I do like your proposal which avoid creating too many *empty* files.
> Since Andrew suggested the way I did the current patch, I'd appreciate
> his feedback too.

But this infrastructure works the other way.  If an architecture wants
a private implementation of arch_remap(), it adds a definition into
arch/XXX/include/asm/mm-arch-hooks.h and does #define arch_remap arch_remap.

If the architecture is OK with the default implementation of
arch_remap(), it does nothing at all.
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