Re: [Xen-devel] Re: [Xen-changelog] [linux-2.6.18-xen] Add "#ifdef ARCH_HAS_DEV_MEM" to archtecture specific file_operations.

[Keir Fraser <keir@xxxxxxxxxxxxx>]

On 9/7/07 20:20, "Hollis Blanchard" <hollisb@xxxxxxxxxx> wrote:

>> By the way, I wonder how PPC manages to build both drivers/char/mem.c and
>> drivers/xen/char/mem.c without ARCH_HAS_DEV_MEM? The model is supposed to be
>> that mem_fops defined by the Xen file is picked up by the generic file. If
>> !ARCH_HAS_DEV_MEM then that doesn't happen -- so who picks up the Xen
>> mem_fops? 
> 
> Hmmm, yeah. Looks like we haven't tested that... :)

If you don't need to build both then there is potentially no problem with
the Xen file hijacking the xlate_dev_mem() functions.

 -- Keir


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