Re: [PATCH v7 01/16] ACPI: processor: Simplify initial onlining to use same path for cold and hotplug

[Hanjun Guo]

On 2024/4/18 21:53, Jonathan Cameron wrote:
> Separate code paths, combined with a flag set in acpi_processor.c to
> indicate a struct acpi_processor was for a hotplugged CPU ensured that
> per CPU data was only set up the first time that a CPU was initialized.
> This appears to be unnecessary as the paths can be combined by letting
> the online logic also handle any CPUs online at the time of driver load.
>
> Motivation for this change, beyond simplification, is that ARM64
> virtual CPU HP uses the same code paths for hotplug and cold path in
> acpi_processor.c so had no easy way to set the flag for hotplug only.
> Removing this necessity will enable ARM64 vCPU HP to reuse the existing
> code paths.
>
> Leave noisy pr_info() in place but update it to not state the CPU
> was hotplugged.
>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@xxxxxxxxxx>
>
> ---
> v7: No change.
> v6: New patch.
> RFT: I have very limited test resources for x86 and other
> architectures that may be affected by this change.
> ---
>   drivers/acpi/acpi_processor.c   |  1 -
>   drivers/acpi/processor_driver.c | 44 ++++++++++-----------------------
>   include/acpi/processor.h        |  2 +-
>   3 files changed, 14 insertions(+), 33 deletions(-)

Nice simplification,

Reviewed-by: Hanjun Guo <guohanjun@xxxxxxxxxx>

Thanks
Hanjun