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Re: [XEN PATCH v2] xen/compiler: deviate the inline macro for MISRA C Rule 20.4
- To: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 12 Mar 2024 12:25:24 +0100
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- Cc: sstabellini@xxxxxxxxxx, michal.orzel@xxxxxxx, xenia.ragiadakou@xxxxxxx, ayan.kumar.halder@xxxxxxx, consulting@xxxxxxxxxxx, bertrand.marquis@xxxxxxx, julien@xxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 12 Mar 2024 11:25:28 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 12.03.2024 12:13, Nicola Vetrini wrote:
> Rule 20.4 states: "A macro shall not be defined with the same name
> as a keyword".
>
> Defining this macro with the same name as the inline keyword
> allows for additionally checking that out-of-lined static inline
> functions end up in the correct section while minimizing churn and
> has a positive impact on the overall safety. See [1] for additional
> context on the motivation of this deviation.
>
> No functional change.
>
> [1]
> https://lore.kernel.org/xen-devel/adaa6d55-266d-4df8-8967-9340080d17e4@xxxxxxxxxx/
>
> Signed-off-by: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
with ...
> --- a/docs/misra/deviations.rst
> +++ b/docs/misra/deviations.rst
> @@ -322,6 +322,12 @@ Deviations related to MISRA C:2012 Rules:
> - /\* Fallthrough \*/
> - /\* Fallthrough. \*/
>
> + * - R20.4
> + - The override of the keyword \"inline\" in xen/compiler.h is present
> so
> + that section contents checks pass when the compiler chooses not to
> + inline a particular function.
... padding (1st line of this bullet point) and indentation (2nd and 3rd
lines) adjusted to what's used elsewhere, including e.g ...
> + - Comment-based deviation.
> +
> * - R20.7
> - Code violating Rule 20.7 is safe when macro parameters are used:
> (1) as function arguments;
... here. Happy to do so while committing.
Jan
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