[PATCH] asm-generic: Add msi.h

[Arnd Bergmann]

On Tuesday 18 November 2014 11:34:37 Thomas Gleixner wrote:
> To support MSI irq domains we want a generic data structure for
> allocation, but we need the option to provide an architecture specific
> version of it. So instead of playing #ifdef games in linux/msi.h we
> add a generic header file and let architectures decide whether to
> include it or to provide their own implementation and provide the
> required typedef.

Acked-by: Arnd Bergmann <arnd at arndb.de>

for merging the asm-generic file

> I know that typedefs are not really nice, but in this case there are no
> forward declarations required and it's the simplest solution.

I must be missing the obvious: what problem does the typedef solve
that you would have with just a struct?

	Arnd