linux-kernel - Re: [PATCH -fixes v2] drivers: perf: Fix smp_processor

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Message-ID: <20240905215550.cegYWVFe@linutronix.de>
Date: Thu, 5 Sep 2024 23:55:50 +0200
From: Nam Cao <namcao@...utronix.de>
To: Alexandre Ghiti <alexghiti@...osinc.com>
Cc: Atish Patra <atishp@...shpatra.org>, Anup Patel <anup@...infault.org>,
	Will Deacon <will@...nel.org>, Mark Rutland <mark.rutland@....com>,
	Paul Walmsley <paul.walmsley@...ive.com>,
	Palmer Dabbelt <palmer@...belt.com>,
	Albert Ou <aou@...s.berkeley.edu>, linux-riscv@...ts.infradead.org,
	linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
	Andrea Parri <parri.andrea@...il.com>
Subject: Re: [PATCH -fixes v2] drivers: perf: Fix smp_processor_id() use in
 preemptible code

On Thu, Aug 29, 2024 at 11:00:34AM +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
> simply use get_cpu()/put_cpu() instead.
> 
> Reported-by: Andrea Parri <parri.andrea@...il.com>
> Reported-by: Nam Cao <namcao@...utronix.de>
> Closes: https://lore.kernel.org/linux-riscv/20240820074925.ReMKUPP3@linutronix.de/ [1]
> Signed-off-by: Alexandre Ghiti <alexghiti@...osinc.com>

Tested-by: Nam Cao <namcao@...utronix.de>

Best regards,
Nam