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Re: [PATCH] x86/MCE: adjust ID2COOKIE() for Misra C:2012 rule 11.2
- To: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 15 May 2026 08:28:59 +0200
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- Cc: xen-devel@xxxxxxxxxxxxxxxxxxxx, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>
- Delivery-date: Fri, 15 May 2026 06:29:04 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 13.05.2026 22:47, Nicola Vetrini wrote:
> On 2026-05-13 16:03, Jan Beulich wrote:
>> ... ("Conversions shall not be performed between a pointer to an
>> incomplete type and any other type"): Add an intermediate cat to void
>> *.
>>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>> ---
>> https://gitlab.com/xen-project/hardware/xen-staging/-/jobs/14351897188
>> (covering more than just this)
>>
>> --- a/xen/arch/x86/cpu/mcheck/mce.c
>> +++ b/xen/arch/x86/cpu/mcheck/mce.c
>> @@ -1264,7 +1264,7 @@ static void cf_check __maybe_unused x86_
>>
>> #if BITS_PER_LONG == 64
>>
>> -#define ID2COOKIE(id) ((mctelem_cookie_t)(id))
>> +#define ID2COOKIE(id) ((mctelem_cookie_t)(void *)(id))
>
> Notwithstanding the comment from Andrew, I think a comment here could be
> nice to explain what it going on, otherwise the double cast looks quite
> odd.
I've added
/* Two layers of casting to cover Misra C:2012 rule 11.2. */
> Unrelated: why not contextually marking this rule as clean to prevent
> regressions?
Isn't this rule (and the others my patches were targeting) marked as clean
already, hence why the allcode job fails?
Jan
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