linux-kernel - Re: [PATCH v7 03/16] ACPI: processor: Drop duplicated check on

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Message-ID: <e3fb151e-8d79-439d-9eea-131a23f1d48c@redhat.com>
Date: Fri, 26 Apr 2024 19:24:07 +1000
From: Gavin Shan <gshan@...hat.com>
To: Jonathan Cameron <Jonathan.Cameron@...wei.com>,
 Thomas Gleixner <tglx@...utronix.de>, Peter Zijlstra <peterz@...radead.org>,
 linux-pm@...r.kernel.org, loongarch@...ts.linux.dev,
 linux-acpi@...r.kernel.org, linux-arch@...r.kernel.org,
 linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
 kvmarm@...ts.linux.dev, x86@...nel.org, Russell King
 <linux@...linux.org.uk>, "Rafael J . Wysocki" <rafael@...nel.org>,
 Miguel Luis <miguel.luis@...cle.com>, James Morse <james.morse@....com>,
 Salil Mehta <salil.mehta@...wei.com>,
 Jean-Philippe Brucker <jean-philippe@...aro.org>,
 Catalin Marinas <catalin.marinas@....com>, Will Deacon <will@...nel.org>
Cc: Ingo Molnar <mingo@...hat.com>, Borislav Petkov <bp@...en8.de>,
 Dave Hansen <dave.hansen@...ux.intel.com>, linuxarm@...wei.com,
 justin.he@....com, jianyong.wu@....com
Subject: Re: [PATCH v7 03/16] ACPI: processor: Drop duplicated check on _STA
 (enabled + present)

On 4/18/24 23:53, Jonathan Cameron wrote:
> The ACPI bus scan will only result in acpi_processor_add() being called
> if _STA has already been checked and the result is that the
> processor is enabled and present.  Hence drop this additional check.
> 
> Suggested-by: Rafael J. Wysocki <rafael@...nel.org>
> Signed-off-by: Jonathan Cameron <Jonathan.Cameron@...wei.com>
> 
> ---
> v7: No change
> v6: New patch to drop this unnecessary code. Now I think we only
>      need to explicitly read STA to print a warning in the ARM64
>      arch_unregister_cpu() path where we want to know if the
>      present bit has been unset as well.
> ---
>   drivers/acpi/acpi_processor.c | 6 ------
>   1 file changed, 6 deletions(-)
> 

Reviewed-by: Gavin Shan <gshan@...hat.com>