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Re: [PATCH] fix ia64 breakage with PHYSDEVOP_pirq_eoi_mfn (was Re: [Xen-devel] [PATCH 2/2] linux/x86: use shared page indicating the need for an EOI notification)
>>> Isaku Yamahata <yamahata@xxxxxxxxxxxxx> 03.12.08 10:20 >>>
>Yes, you're correct. In fact I had the patch which you suggested,
>but I was hesitated to change the x86 implementation so that
>I had changed it to use virt_to_bus() on x86.
>
>
>
>evtchn, physdev: fix pirq_eoi_mfn for IA64 support.
>
>On ia64, global variables aren't in identity mapping area (i.e. kaddr)
>so that there is no relationship between its virtual address and
>its physical address. Thus virt_to_bus() can't be applied to them.
>So introduce arbitrary_virt_to_bus() to wrap arch dependent function
>and make use of it.
So you really need arbitrary_virt_to_bus() along with
arbitrary_virt_to_machine()? Is that another ia64 specific need (i.e. do
the two have different meanings there)?
Jan
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