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Re: [Xen-devel] [PATCH RFC XEN v1 03/14] xen: arm: switch arch_do_domctl to a common exit path

On 15/12/15 16:57, Ian Campbell wrote:
> On Tue, 2015-12-15 at 16:34 +0000, Stefano Stabellini wrote:
>>  .. .arch_do_domclt...
>>> +
>>> +    if ( copyback && __copy_to_guest(u_domctl, domctl, 1) )
>>> +        rc = -EFAULT;
>> This code is already present in do_domctl (the caller of this function).
>> I wonder if it makes sense to pass a copyback* parameter to
>> arch_do_domctl and just rely on the caller's exit path.
> Could do, cc-ing Jan in addition to Andy for x86 perspective (since this
> would be a generic change.



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