On Thu, Aug 13, 2020 at 7:57 PM Andy Shevchenko
<andriy.shevchenko@xxxxxxxxxxxxxxx> wrote:
>
> There will be at least one user that can utilize new helper.
> Provide the helper for future user and for wider use.
>
> Deliberately avoid min()/max() macro as they are still parts of
> kernel.h which is quite a burden to be included here in order
> to avoid circular dependencies.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@xxxxxxxxxxxxxxx>
> ---
> include/linux/ioport.h | 10 ++++++++++
> 1 file changed, 10 insertions(+)
>
> diff --git a/include/linux/ioport.h b/include/linux/ioport.h
> index c98df0ec7422..1d5ab2e7f9eb 100644
> --- a/include/linux/ioport.h
> +++ b/include/linux/ioport.h
> @@ -232,6 +232,16 @@ static inline bool resource_overlaps(struct resource *r1, struct resource *r2)
> return (r1->start <= r2->end && r1->end >= r2->start);
> }
>
> +static inline bool
> +resource_intersection(struct resource *r1, struct resource *r2, struct resource *r)
> +{
> + if (!resource_overlaps(r1, r2))
> + return false;
> + r->start = r1->start > r2->start ? r1->start : r2->start;
> + r->end = r1->end < r2->end ? r1->end : r2->end;
> + return true;
> +}
I have the same comments as for patch [3/7].
> +
> static inline bool
> resource_union(struct resource *r1, struct resource *r2, struct resource *r)
> {
> --
> 2.28.0
>
