Re: [PATCH v2 08/16] xen/riscv: add temporary stub for smp_send_event_check_mask()

[Oleksii Kurochko <oleksii.kurochko@gmail.com>]

On 1/29/26 5:32 PM, Jan Beulich wrote:
> On 22.01.2026 17:47, Oleksii Kurochko wrote:
>> RISC-V SMP support is not yet implemented, but smp_send_event_check_mask()
>> is required by common code and vcpu_kick(), which is introduced later.
>> Provide a temporary stub implementation that asserts the mask only targets
>> CPU0.
>>
>> cpumask_subset() is used instead of cpumask_equal() because some callers
>> (e.g. cpumask_raise_softirq() or cpu_raise_softirq_batch_finish()) may
>> legitimately pass an empty mask, which would otherwise cause false
>> failures.
>>
>> The BUG_ON() ensures that attempts to use this function with multiple CPUs
>> are caught early once SMP support is introduced.
>>
>> Signed-off-by: Oleksii Kurochko <oleksii.kurochko@gmail.com>
> Acked-by: Jan Beulich <jbeulich@suse.com>

Thanks.

>
> Looks like this is independent of earlier patches in the series, and hence
> could go in right away? Please confirm.

I confirm that it is independent and could go right away. I, also, checked
locally compilation of this patch on top of current staging and it is fine.

~ Oleksii