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To: "Rafael J. Wysocki" <rafael@kernel.org>, Russell King
 <rmk+kernel@armlinux.org.uk>
Cc: linux-pm@vger.kernel.org, loongarch@lists.linux.dev,
 linux-acpi@vger.kernel.org, linux-arch@vger.kernel.org,
 linux-kernel@vger.kernel.org, linux-arm-kernel@lists.infradead.org,
 linux-riscv@lists.infradead.org, kvmarm@lists.linux.dev, x86@kernel.org,
 acpica-devel@lists.linuxfoundation.org, linux-csky@vger.kernel.org,
 linux-doc@vger.kernel.org, linux-ia64@vger.kernel.org,
 linux-parisc@vger.kernel.org, Salil Mehta <salil.mehta@huawei.com>,
 Jean-Philippe Brucker <jean-philippe@linaro.org>, jianyong.wu@arm.com,
 justin.he@arm.com, James Morse <james.morse@arm.com>, Jonathan Cameron
 <Jonathan.Cameron@huawei.com>, "Rafael J. Wysocki" <rafael@kernel.org>
Subject: Re: [PATCH RFC v4 02/15] ACPI: processor: Register all CPUs from
 acpi_processor_get_info()
In-Reply-To: <CAJZ5v0iiJpUWq5GMSnKFWQTzn_bdwoQz9m=hDaXNg4Lj_ePF4g@mail.gmail.com>
References: <Zbp5xzmFhKDAgHws@shell.armlinux.org.uk>
 <E1rVDmU-0027YP-Jz@rmk-PC.armlinux.org.uk>
 <CAJZ5v0iiJpUWq5GMSnKFWQTzn_bdwoQz9m=hDaXNg4Lj_ePF4g@mail.gmail.com>
Date: Tue, 20 Feb 2024 21:59:11 +0100
Message-ID: <87h6i2hmxs.ffs@tglx>
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On Thu, Feb 15 2024 at 20:22, Rafael J. Wysocki wrote:
> On Wed, Jan 31, 2024 at 5:50=E2=80=AFPM Russell King <rmk+kernel@armlinux=
org.uk> wrote:
>> diff --git a/drivers/base/cpu.c b/drivers/base/cpu.c
>> index 47de0f140ba6..13d052bf13f4 100644
>> --- a/drivers/base/cpu.c
>> +++ b/drivers/base/cpu.c
>> @@ -553,7 +553,11 @@ static void __init cpu_dev_register_generic(void)
>>  {
>>         int i, ret;
>>
>> -       if (!IS_ENABLED(CONFIG_GENERIC_CPU_DEVICES))
>> +       /*
>> +        * When ACPI is enabled, CPUs are registered via
>> +        * acpi_processor_get_info().
>> +        */
>> +       if (!IS_ENABLED(CONFIG_GENERIC_CPU_DEVICES) || !acpi_disabled)
>>                 return;
>
> Honestly, this looks like a quick hack to me and it absolutely
> requires an ACK from the x86 maintainers to go anywhere.

That should work, but yes I agree it's all but pretty.