Re: Calculating kernel logical address ..

Daniel Phillips
2002-09-09T18:03:24Z

On Monday 09 September 2002 19:23, David S. Miller wrote:
> From: "Richard B. Johnson" <root@chaos.analogic.com>
> Date: Mon, 9 Sep 2002 13:29:42 -0400 (EDT)
>
> I think there is a virt_to_bus() macro and its inverse.
>
> Which is deprecate and not to be used by any new code.
> Use Documentation/DMA-mapping.txt instead.
>
> If you meant virt_to_phys(), this does not work on arbitrary
> kernel virtual addresses either only direct mapped ones
> (ie. kmalloc() or get_free_page() data).

In this case he starts with a kmalloc, then mmaps it somehow. Imran,
exactly what code do you use to mmap the kmalloced memory?

--
Daniel