[RFC PATCH 2/2] omap: switch to ioremap function pointer

[arnd@arndb.de (Arnd Bergmann)]

On Sunday 22 May 2011 11:04:40 Jean-Christophe PLAGNIOL-VILLARD wrote:
> 
> --- a/arch/arm/plat-omap/io.c
> +++ b/arch/arm/plat-omap/io.c
> @@ -23,6 +23,12 @@
>  #define BETWEEN(p,st,sz)       ((p) >= (st) && (p) < ((st) + (sz)))
>  #define XLATE(p,pst,vst)       ((void __iomem *)((p) - (pst) + (vst)))
>  
> +void __init omap_set_ioremap(void)
> +{
> +       arch_ioremap = omap_ioremap;
> +       arch_iounmap = omap_iounmap;
> +}
> +
>  /*
>   * Intercept ioremap() requests for addresses in our fixed mapping regions.

The only thing that the ioremap functions for omap do as a special case
is to handle the fixed mappings. Maybe a better approach would be to
make handling this in omap (and others) unnecessary, using one of
two approaches:

* Remove all fixed mappings that are also ioremapped, and rely on every
  user calling ioremap correctly. I don't see why we would want to allow
  both methods anyway.

* Handle the fixed mappings in the generic ioremap code. They all go through
  create_mapping(), so we can save a list to walk there.

	Arnd