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Re: [XEN PATCH 07/11] xen/page_alloc: address violations of MISRA C Rule 20.7
- To: Nicola Vetrini <nicola.vetrini@xxxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 26 Mar 2024 16:35:48 +0100
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- Cc: sstabellini@xxxxxxxxxx, michal.orzel@xxxxxxx, xenia.ragiadakou@xxxxxxx, ayan.kumar.halder@xxxxxxx, consulting@xxxxxxxxxxx, andrew.cooper3@xxxxxxxxxx, roger.pau@xxxxxxxxxx, bertrand.marquis@xxxxxxx, julien@xxxxxxx, George Dunlap <george.dunlap@xxxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx
- Delivery-date: Tue, 26 Mar 2024 15:36:04 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 26.03.2024 16:27, Nicola Vetrini wrote:
> On 2024-03-25 10:27, Jan Beulich wrote:
>> On 22.03.2024 17:01, Nicola Vetrini wrote:
>>> --- a/xen/common/page_alloc.c
>>> +++ b/xen/common/page_alloc.c
>>> @@ -150,7 +150,7 @@
>>> #include <asm/paging.h>
>>> #else
>>> #define p2m_pod_offline_or_broken_hit(pg) 0
>>
>> Seeing this in context: Does Misra also have a rule demanding
>> evaluation
>> of macro arguments?
>
> No such rule. There is one for unused function parameters, though.
Interesting. Are there no concerns regarding side effects not taking
place, as one might expect when looking just at the call site?
>>> -#define p2m_pod_offline_or_broken_replace(pg) BUG_ON(pg != NULL)
>>> +#define p2m_pod_offline_or_broken_replace(pg) BUG_ON((pg) != NULL)
>>
>> Or easier
>>
>> #define p2m_pod_offline_or_broken_replace(pg) BUG_ON(pg)
>>
>> ?
>>
>
> Good point. I'll modify it.
I can do that as well while committing. With that adjustment
Acked-by: Jan Beulich <jbeulich@xxxxxxxx>
Jan
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