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Re: [PATCH v2 4/6] rangeset: introduce rangeset_subtract
- To: Stewart Hildebrand <stewart.hildebrand@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 13 May 2025 17:39:03 +0200
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- Cc: 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
- Delivery-date: Tue, 13 May 2025 15:39:36 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 08.05.2025 15:20, Stewart Hildebrand wrote:
> --- a/xen/common/rangeset.c
> +++ b/xen/common/rangeset.c
> @@ -397,6 +397,18 @@ int rangeset_merge(struct rangeset *r1, struct rangeset
> *r2)
> return rangeset_report_ranges(r2, 0, ~0UL, merge, r1);
> }
>
> +static int cf_check subtract(unsigned long s, unsigned long e, void *data)
> +{
> + struct rangeset *r = data;
> +
> + return rangeset_remove_range(r, s, e);
> +}
> +
> +int rangeset_subtract(struct rangeset *r1, struct rangeset *r2)
> +{
> + return rangeset_report_ranges(r2, 0, ~0UL, subtract, r1);
> +}
I understand this was committed already, but I don't understand why: This
introduces a Misra rule 2.1 violation aiui. The rule isn't tagged as clean
yet, but it was accepted and hence I thought we would strive towards not
introducing new violations. What's the deal?
Jan
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