Re: [PATCH RFC v2 6/6] KVM: introduce a new API for getting dirty bitmaps

Avi Kivity
2010-04-23T12:42:44Z

On 04/23/2010 03:27 PM, Arnd Bergmann wrote:
>
>> Using a 64-bit integer avoids the problem (though perhaps not sufficient
>> for s390, Arnd?)
>>
> When there is only a __u64 for the address, it will work on s390 as well,
> gcc is smart enough to clear the upper bit on a cast from long to pointer.
>

Ah, much more convenient than compat_ioctl. I assume it part of the
ABI, not a gccism?

--
Do not meddle in the internals of kernels, for they are subtle and quick to panic.