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Re: [PATCH] x86/DMI: adjustments to comply with Misra C:2012 Rule 9.3


  • To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Jan Beulich <jbeulich@xxxxxxxx>
  • Date: Thu, 30 Nov 2023 15:56:03 +0100
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  • Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, George Dunlap <george.dunlap@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
  • Delivery-date: Thu, 30 Nov 2023 14:56:15 +0000
  • List-id: Xen developer discussion <xen-devel.lists.xenproject.org>

On 30.11.2023 08:55, Jan Beulich wrote:
> The rule demands that all array elements be initialized (or dedicated
> initializers be used). Introduce a small set of macros to allow doing so
> without unduly affecting use sites (in particular in terms of how many
> elements .matches[] actually has; right now there's no use of
> DMI_MATCH4(), so we could even consider reducing the array size to 3).
> 
> Note that DMI_MATCH() needs adjustment because of the comma included in
> its expansion, which - due to being unparenthesized - would otherwise
> cause macro arguments in the "further replacement" step to be wrong.

Sadly this doesn't work with older gcc (4.8.5 is what I had an issue with,
complaining "initializer element is not constant").

Jan



 


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