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Re: [Xen-devel] [PATCH 1/2] xen: event channel arrays are xen_ulong_t and not unsigned long



On 14/02/13 14:19, Ian Campbell wrote:
> On ARM we want these to be the same size on 32- and 64-bit.
> 
> This is an ABI change on ARM. X86 does not change.

Does this actually work for all possible events?  In a 32-bit guest on a
64-bit hypervisor, does the __ffs() find set bits in the upper 32-bit
word of the pending selector?  I don't think so.

David

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