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Re: [PATCH v2 2/3] misra: deviate MISRA C Rule 5.5 for 'request_irq()'
- To: Dmytro Prokopchuk1 <dmytro_prokopchuk1@xxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 13 Jul 2026 09:09:58 +0200
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- Cc: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>, Doug Goldstein <cardoe@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Mon, 13 Jul 2026 07:10:05 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 12.07.2026 16:04, Dmytro Prokopchuk1 wrote:
> --- a/automation/eclair_analysis/ECLAIR/deviations.ecl
> +++ b/automation/eclair_analysis/ECLAIR/deviations.ecl
> @@ -136,6 +136,10 @@ These macros address differences in argument count
> during compile-time, effectiv
>
> -config=MC3A2.R5.5,ignored_macros+="name(hypfs_alloc_dyndata)&&loc(file(^xen/include/xen/hypfs\\.h$))"
> -doc_end
>
> +-doc_begin="Clash between 'request_irq()' function and macro name in
> 'xen/drivers/passthrough/arm/smmu.c' is deliberate."
> +-config=MC3A2.R5.5,ignored_macros+="name(request_irq)&&loc(file(^xen/drivers/passthrough/arm/smmu\\.c$))"
> +-doc_end
This suitably constrains things to a single file.
> --- a/docs/misra/deviations.rst
> +++ b/docs/misra/deviations.rst
> @@ -185,6 +185,13 @@ Deviations related to MISRA C:2012 Rules:
> function, so the name clash is controlled.
> - ECLAIR has been configured to ignore this macro.
>
> + * - R5.5
> + - Clash between the 'request_irq()' function and macro name is
> deliberate.
This doesn't, and ...
> + The function uses the Xen 'request_irq()' argument order, while the
> macro
> + is a compatibility wrapper for the ARM SMMU driver that adapts calls
> by
> + reordering the handler and flags arguments.
> + - ECLAIR has been configured to ignore this macro.
... there's then not even a mention of the file name later (ftaod: even if
there was, to me at least this would come too late).
> --- a/docs/misra/rules.rst
> +++ b/docs/misra/rules.rst
> @@ -226,6 +226,10 @@ maintainers if you want to suggest a change.
> because the macro is a typed convenience wrapper around the size-based
> allocation function.
>
> + Clash between request_irq() function and macro names is allowed
> because
> + the macro is a local compatibility wrapper that adapts ARM SMMU driver
> + call to Xen's request_irq() argument order.
Similarly here.
Jan
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