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From: Oleg Keri <okerixx@gmail.com>
To: Will Deacon <will@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
	Mark Rutland <mark.rutland@arm.com>,
	Ingo Molnar <mingo@redhat.com>,
	Peter Zijlstra <peterz@infradead.org>,
	Juri Lelli <juri.lelli@redhat.com>,
	Vincent Guittot <vincent.guittot@linaro.org>,
	Dietmar Eggemann <dietmar.eggemann@arm.com>,
	Steven Rostedt <rostedt@goodmis.org>,
	Ben Segall <bsegall@google.com>, Mel Gorman <mgorman@suse.de>,
	Valentin Schneider <vschneid@redhat.com>,
	K Prateek Nayak <kprateek.nayak@amd.com>,
	Prasanna Kumar T S M <ptsm@linux.microsoft.com>,
	Sumit Gupta <sumitg@nvidia.com>,
	Beata Michalska <beata.michalska@arm.com>,
	linux-arm-kernel@lists.infradead.org,
	linux-kernel@vger.kernel.org,
	Ananthu C V <ananthu.cv@oss.qualcomm.com>,
	linux-pm@vger.kernel.org
Subject: Re: [PATCH v5] arm64: topology: fix arch_freq_get_on_cpu() overflow above 4.19 GHz
Date: Wed, 23 Sep 2026 09:35:00 +0200	[thread overview]
Message-ID: <179014889997.344140.3757658991789489835@gmail.com> (raw)
In-Reply-To: <arKpSGPXOCFF09hM@willie-the-truck>

Hi Will,

On Tue, Sep 22, 2026, Will Deacon wrote:
> ... does this introduce unnecessary 64-bit arithmetic for 32-bit
> architectures that currently pass 'unsigned long' to the existing macro?

Good catch. The truncation happens in the unsigned int temporary in
arch_freq_get_on_cpu(), so v6 will drop that temporary and leave
kernel/sched alone.

Thanks,
Oleg

      reply	other threads:[~2026-09-23  7:35 UTC|newest]

Thread overview: 4+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-09-17 18:20 Oleg Keri
2026-09-21 13:50 ` Dietmar Eggemann
2026-09-22 16:14 ` Will Deacon
2026-09-23  7:35   ` Oleg Keri [this message]

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