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    SubjectRe: [PATCH v4 2/7] cpumask: Introduce for_each_cpu_andnot()
    On Tue, Sep 27, 2022 at 05:45:04PM +0100, Valentin Schneider wrote:
    > On 25/09/22 08:23, Yury Norov wrote:
    > > On Fri, Sep 23, 2022 at 04:55:37PM +0100, Valentin Schneider wrote:
    > >> +/**
    > >> + * for_each_cpu_andnot - iterate over every cpu present in one mask, excluding
    > >> + * those present in another.
    > >> + * @cpu: the (optionally unsigned) integer iterator
    > >> + * @mask1: the first cpumask pointer
    > >> + * @mask2: the second cpumask pointer
    > >> + *
    > >> + * This saves a temporary CPU mask in many places. It is equivalent to:
    > >> + * struct cpumask tmp;
    > >> + * cpumask_andnot(&tmp, &mask1, &mask2);
    > >> + * for_each_cpu(cpu, &tmp)
    > >> + * ...
    > >> + *
    > >> + * After the loop, cpu is >= nr_cpu_ids.
    > >> + */
    > >> +#define for_each_cpu_andnot(cpu, mask1, mask2) \
    > >> + for ((cpu) = -1; \
    > >> + (cpu) = cpumask_next_andnot((cpu), (mask1), (mask2)), \
    > >> + (cpu) < nr_cpu_ids;)
    > >
    > > This would raise cpumaks_check() warning at the very last iteration.
    > > Because cpu is initialized insize the loop, you don't need to check it
    > > at all. You can do it like this:
    > >
    > > #define for_each_cpu_andnot(cpu, mask1, mask2) \
    > > for_each_andnot_bit(...)
    > >
    > > Check this series for details (and please review).
    > > https://lore.kernel.org/all/20220919210559.1509179-8-yury.norov@gmail.com/T/
    > >
    >
    > Thanks, I'll have a look.

    Also, if you send first 4 patches as a separate series on top of
    bitmap-for-next, I'll be able to include them in bitmap-for-next
    and then in 6.1 pull-request.

    Thanks,
    Yury

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