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Wed, 23 Sep 2026 00:35:09 -0700 (PDT) Received: from localhost.localdomain ([94.252.74.168]) by smtp.googlemail.com with ESMTPSA id 5b1f17b1804b1-49fde180a39sm70649425e9.1.2026.09.23.00.35.08 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Wed, 23 Sep 2026 00:35:08 -0700 (PDT) From: Oleg Keri To: Will Deacon Cc: Catalin Marinas , Mark Rutland , Ingo Molnar , Peter Zijlstra , Juri Lelli , Vincent Guittot , Dietmar Eggemann , Steven Rostedt , Ben Segall , Mel Gorman , Valentin Schneider , K Prateek Nayak , Prasanna Kumar T S M , Sumit Gupta , Beata Michalska , linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Ananthu C V , 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 Message-ID: <179014889997.344140.3757658991789489835@gmail.com> X-Mailer: git-send-email 2.55.0 In-Reply-To: References: MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260923_003512_865985_DD447411 X-CRM114-Status: GOOD ( 10.04 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org 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