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Mon, 4 Mar 2024 06:27:10 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface User-Agent: Cyrus-JMAP/3.11.0-alpha0-205-g4dbcac4545-fm-20240301.001-g4dbcac45 Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 Message-Id: <1baf9a7f-b0e4-45d8-ac57-0727a213d82d@app.fastmail.com> In-Reply-To: <20240304112441.707ded23@donnerap.manchester.arm.com> References: <338c89bb-a70b-4f35-b71b-f974e90e3383@app.fastmail.com> <20240304112441.707ded23@donnerap.manchester.arm.com> Date: Mon, 04 Mar 2024 12:26:46 +0100 From: "Arnd Bergmann" To: "Andre Przywara" Cc: "Naresh Kamboju" , "open list" , "Linux ARM" , linux-sunxi@lists.linux.dev, dri-devel@lists.freedesktop.org, lkft-triage@lists.linaro.org, "Maxime Ripard" , "Dave Airlie" , "Dan Carpenter" , "Ard Biesheuvel" Subject: Re: arm: ERROR: modpost: "__aeabi_uldivmod" [drivers/gpu/drm/sun4i/sun4i-drm-hdmi.ko] undefined! Content-Type: text/plain On Mon, Mar 4, 2024, at 12:24, Andre Przywara wrote: > On Mon, 04 Mar 2024 12:11:36 +0100 "Arnd Bergmann" wrote: >> >> This used to be a 32-bit division. If the rate is never more than >> 4.2GHz, clock could be turned back into 'unsigned long' to avoid >> the expensive div_u64(). > > Wouldn't "div_u64(clock, 200)" solve this problem? Yes, that's why I mentioned it as the worse of the two obvious solutions. ;-) Arnd