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Re: [PATCH 12/12] x86/nSVM: address Misra 2.1 rule violation
- To: Roger Pau Monné <roger@xxxxxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 10 Sep 2026 10:42:30 +0200
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
- Delivery-date: Thu, 10 Sep 2026 08:42:36 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 10.09.2026 09:44, Roger Pau Monné wrote:
> On Fri, Aug 28, 2026 at 09:06:20AM +0200, Jan Beulich wrote:
>> The 16-bit range of "port" is fully handled by the switch(). Therefore the
>> default: case is reported unreachable by Eclair. Insert BUILD_ERROR() to
>> annotate this for Eclair.
>>
>> No functional change.
>>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>
> Acked-by: Roger Pau Monné <roger@xxxxxxxxxxxxxx>
Thanks.
> That however is a bit weird IMO, as we have usually said we would
> prefer not to use fixed width types in general, and hence one might
> argue that port should be unsigned int. Then the BUILD_ERROR() might
> trigger?
Yes, such a type change would need accompanying by removal of that
BUILD_ERROR(). The default: case then also wouldn't be deemed
unreachable anymore (even though in practice it still would be).
Jan
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