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Thu, 6 Nov 2025 03:18:01 -0500 (EST) X-Mailer: MessagingEngine.com Webmail Interface Precedence: bulk X-Mailing-List: linux-kernel@vger.kernel.org List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 X-ThreadId: ADbfFBy_oOaZ Date: Thu, 06 Nov 2025 09:17:21 +0100 From: "Arnd Bergmann" To: "Pintu Kumar Agarwal" Cc: "Siddh Raman Pant" , linux-kernel , kernelnewbies , "Neil Armstrong" Message-Id: <0fe1ce84-b7b2-4c37-a94a-80ddd7339105@app.fastmail.com> In-Reply-To: References: <19a481a7843.53422ba121754.4867625372707455852@siddh.me> Subject: =?UTF-8?Q?Re:_=C2=A0Query:_Y2038_patch_series_for_3.18_Kernel?= Content-Type: text/plain Content-Transfer-Encoding: 7bit On Wed, Nov 5, 2025, at 10:47, Pintu Kumar Agarwal wrote: > On Tue, 4 Nov 2025 at 15:18, Arnd Bergmann wrote: > >> Which chip exactly are you using? > This request is for one of the legacy QC MDM 9K chipset. Ah, I see. Support for those was never fully merged, so it's much harder to upgrade than other platforms, especially if you need the modem driver to work. We do have some support for the newer sdx55/sdxx65 chips, and much more rudimentary support for mdm9607 and mdm9615 (without modem) in mainline, but since we've never had a fully supported board use the older chips I would not expect them to work without additional bugfixes and a rebase of the missing drivers. There is of course a chance that you may get them to work in a way that does not rely on knowing the time. If you don't have (or use) and RTC and the system time is always set to Jan 1 1970 on boot, this would technically work indefinitely. Running a 3.18 kernel is obviously a bad idea for a number of other reasons. Arnd