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Sverdlin" , "Alexandre Belloni" , "Alexandre Torgue" , "Andrew Lunn" , "Ard Biesheuvel" , "Claudiu Beznea" , "Daniel Mack" , "Frank Li" , "Gregory Clement" , "Haojian Zhuang" , "Jeremy J. Peper" , "Kristoffer Ericson" , "Krzysztof Kozlowski" , "Linus Walleij" , "Mark Brown" , "Marc Zyngier" , "Mike Rapoport" , "Nicolas Ferre" , "Patrice Chotard" , "Ralph Siemsen" , "Robert Jarzmik" , "Russell King" , "Sascha Hauer" , "Sebastian Hesselbarth" , "Stefan Agner" , "Stefan Wiehler" , "Tony Lindgren" , "Vladimir Zapolskiy" , "Will Deacon" Message-Id: <4099d875-0da3-45df-9abe-437d688039ef@app.fastmail.com> In-Reply-To: References: <20260701212353.2196041-1-arnd@kernel.org> <20260701212353.2196041-7-arnd@kernel.org> Subject: Re: [PATCH v2 06/19] ARM: mark CPU_ENDIAN_BE8 as deprecated Content-Type: text/plain Content-Transfer-Encoding: 7bit X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.9.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20260701_230224_694308_54BF7896 X-CRM114-Status: GOOD ( 10.82 ) 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 On Wed, Jul 1, 2026, at 23:57, Ethan Nelson-Moore wrote: >> At the moment, there are no known bugs with big-endian ARMv7 mode, but >> it does break occasionally and require someone to fix it. By marking >> the code as 'depends on BROKEN' now, it will no longer be covered by CI >> testing. If any users remain, they can keep patching out the dependency >> but are more likely to run into regressions. >> >> The big-endian ARMv5 support (CONFIG_CPU_ENDIAN_BE32) in contrast is >> still used on Intel IXP4xx platform, and is the only currently supported >> mode there, so this one can still be enabled. > > If IXP4xx is the only known remaining user, would it make sense for > CPU_BIG_ENDIAN to instead depend on ARCH_IXP4XX || BROKEN? Is BE32 > mode known to work correctly on any other platforms? This is essentially what we have, just expressed the other way round: all ARMv4/v4t/v5 platforms depend on CONFIG_CPU_LITTLE_ENDIAN, except for IXP4xx, which depends on CONFIG_CPU_BIG_ENDIAN. Arnd