Re: [PATCH 00/18] Cross-architecture definitions of relaxed MMIO accessors

[Will Deacon]

Hi Sam,

On Thu, Apr 17, 2014 at 04:36:38PM +0100, Sam Ravnborg wrote:
> On Thu, Apr 17, 2014 at 02:44:03PM +0100, Will Deacon wrote:
> > Hello,
> > 
> > This RFC series attempts to define a portable (i.e. cross-architecture)
> > definition of the {readX,writeX}_relaxed MMIO accessor functions. These
> > functions are already in widespread use amongst drivers (mainly those supporting
> > devices embedded in ARM SoCs), but lack any well-defined semantics and,
> > subsequently, any portable definitions to allow these drivers to be compiled for
> > other architectures.
> 
> Could this be made in such a way that only architectures that need
> to provide their own versions actually have to add them?
> 
> The current patch-set adds the same dummy defines all over,
> and will put this burden also on new architectures.

It shouldn't be a burden for new architectures, as they will use
asm-generic/io.h and get the definitions from there.

Will
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@xxxxxxxxxxxxxxx
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/