[PATCH -fixes] drivers: perf: Fix smp_processor_id() use in preemptible code

[Alexandre Ghiti]

On 26/08/2024 19:31, Nam Cao wrote:
> On Mon, Aug 26, 2024 at 06:52:10PM +0200, Alexandre Ghiti wrote:
>> As reported in [1], the use of smp_processor_id() in
>> pmu_sbi_device_probe() must be protected by disabling the preemption, so
>> simple use get_cpu()/put_cpu() instead.
>>
>> Reported-by: Nam Cao <namcao at linutronix.de>
>> Closes: https://lore.kernel.org/linux-riscv/20240820074925.ReMKUPP3@linutronix.de/ [1]
>> Signed-off-by: Alexandre Ghiti <alexghiti at rivosinc.com>
> Tested-by: Nam Cao <namcao at linutronix.de>
>
> I think this also needs:
> Fixes: a8625217a054 ("drivers/perf: riscv: Implement SBI PMU snapshot function")


Indeed, thanks for the tag!


>
> Best regards,
> Nam
>
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