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Re: [XEN PATCH v5 7/8] x86/mm: add defensive return
- To: Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Thu, 29 Aug 2024 09:04:37 +0200
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- Cc: Federico Serafini <federico.serafini@xxxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, consulting@xxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>
- Delivery-date: Thu, 29 Aug 2024 07:04:44 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 29.08.2024 02:35, Stefano Stabellini wrote:
> On Mon, 29 Jul 2024, Stefano Stabellini wrote:
>> On Mon, 29 Jul 2024, Federico Serafini wrote:
>>> Add defensive return statement at the end of an unreachable
>>> default case. Other than improve safety, this meets the requirements
>>> to deviate a violation of MISRA C Rule 16.3: "An unconditional `break'
>>> statement shall terminate every switch-clause".
>>>
>>> Signed-off-by: Federico Serafini <federico.serafini@xxxxxxxxxxx>
>>
>> Reviewed-by: Stefano Stabellini <sstabellini@xxxxxxxxxx>
>>
>>> ---
>>> No changes from v3 and v4, further feedback on this thread would be
>>> appreciated:
>>> https://lists.xenproject.org/archives/html/xen-devel/2024-07/msg00474.html
>
> Looking at the older threads, I looks like Jan suggested EACCES, I also
> think it is marginally better. My R-b stands also for EACCES. Jan, I
> think you should go ahead and fix on commit
No, I very definitely want a 2nd x86 maintainer opinion here. Or a better
suggestion for the error code to use by anyone. After all, as you confirm,
EACCES is only marginally better.
Jan
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