Re: How to replace bus_to_virt()?

[Segher Boessenkool]

> is there a *direct* future-proof replacement for bus_to_virt()?
>
> It appears there are already architectures which do not define a  
> bus_to_virt() funtion or macro. If there isn't a direct  
> replacement, is there at least a way to detect at compile time  
> whether bus_to_virt() exists?
>
> I am asking because the sbp2 driver uses bus_to_virt() if  
> CONFIG_IEEE1394_SBP2_PHYS_DMA=y. I would like to replace this  
> option by an automatic detection when the respective code in sbp2  
> is actually required.
>
> The current implementation is this: Sbp2 uses bus_to_virt() to map  
> from 1394 bus addresses (which are currently identical to local  
> host bus addresses) to virtual addresses.

Sounds like you should be using phys_to_virt() anyway?


Segher

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