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Re: [XEN PATCH 4/4] x86/traps: address violation of MISRA C Rule 8.4
- To: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 28 May 2024 08:31:50 +0200
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- Cc: sstabellini@xxxxxxxxxx, michal.orzel@xxxxxxx, xenia.ragiadakou@xxxxxxx, ayan.kumar.halder@xxxxxxx, consulting@xxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 28 May 2024 06:31:56 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 27.05.2024 16:53, Nicola Vetrini wrote:
> Rule 8.4 states: "A compatible declaration shall be visible when
> an object or function with external linkage is defined".
>
> The function do_general_protection is either used is asm code
> or only within this unit, so there is no risk of this getting
> out of sync with its definition, but the function must remain
> extern.
>
> Therefore, this function is deviated using a comment-based deviation.
> No functional change.
>
> Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
Albeit here, too, I'm not entirely happy with the wording, but I'll let
it go as is. While "there is no risk of this getting out of sync with
its definition" is true for the C side, there's always the risk of
assembly going out of sync with C, simply because the two cannot be
properly connected by any means.
Jan
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