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Re: [PATCH] x86/cpufreq: allocate processor_pminfo[] dynamically
- To: Jason Andryuk <jason.andryuk@xxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Mon, 9 Nov 2026 08:22:24 +0100
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- Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Roger Pau Monné <roger@xxxxxxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>, "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- Delivery-date: Mon, 09 Nov 2026 07:22:40 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 07.11.2026 00:44, Jason Andryuk wrote:
> On 2026-11-03 07:53, Jan Beulich wrote:
>> There's no need to have a NR_CPUS-dimensioned static array there.
>>
>> As ordering of pre-SMP initcalls isn't well-defined, allocate the array
>> from both cpufreq_presmp_init() and cpufreq_register_driver().
>>
>> Alongside adding a few NULL checks, drop a redundant one from
>> get_cpufreq_para().
>>
>> Signed-off-by: Jan Beulich <jbeulich@xxxxxxxx>
>>
>> --- a/xen/drivers/acpi/pm-op.c
>> +++ b/xen/drivers/acpi/pm-op.c
>> @@ -104,8 +104,7 @@ static int get_cpufreq_para(struct xen_s
>> pmpt = processor_pminfo[op->cpuid];
>> policy = per_cpu(cpufreq_cpu_policy, op->cpuid);
>>
>> - if ( !pmpt ||
>> - ((pmpt->init & XEN_PX_INIT) && !pmpt->perf.states) ||
>> + if ( ((pmpt->init & XEN_PX_INIT) && !pmpt->perf.states) ||
>
> It's redundant today, but that depends on the other check. Though maybe
> get_cpufreq_para could take pmpt as an argument?
Perhaps, yet I'd view this as an independent change.
> Anyway:
> Reviewed-by: Jason Andryuk <jason.andryuk@xxxxxxx>
Thanks again.
Jan
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