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([2405:201:8000:a149:4670:c55c:fe13:754d]) by smtp.gmail.com with ESMTPSA id d9443c01a7336-29034f3c700sm140037515ad.103.2025.10.13.10.36.32 (version=TLS1_3 cipher=TLS_AES_128_GCM_SHA256 bits=128/128); Mon, 13 Oct 2025 10:36:36 -0700 (PDT) Message-ID: <56075d23-8bae-4a11-b5a5-9ed251fc7707@gmail.com> Date: Mon, 13 Oct 2025 23:06:31 +0530 Precedence: bulk X-Mailing-List: linux-kernel-mentees@lists.linux.dev List-Id: List-Subscribe: List-Unsubscribe: MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [PATCH] lib/xz: remove dead IA-64 (Itanium) support code To: Lasse Collin Cc: skhan@linuxfoundation.org, khalid@kernel.org, david.hunter.linux@gmail.com, linux-kernel@vger.kernel.org, linux-kernel-mentees@lists.linux.dev, Phillip Lougher References: <20251013115136.16773-1-spyjetfayed@gmail.com> <79cebb23-5232-49f1-a0ac-b401707c2b52@gmail.com> <20251013183800.7af293f5.lasse.collin@tukaani.org> Content-Language: en-US From: Ankan Biswas Autocrypt: addr=spyjetfayed@gmail.com; keydata= xsFNBGh86ToBEADO5CanwR3XsVLXKhPz04FG37/GvZj3gBoA3ezIB/M/wwGdx6ISqUzYDUsB Id5LM/QxLWYdeiYyACQoMDYTojfOpG6bdZrGZ2nqTO/PY9tmY31UyEXg5lwZNGnZgV+Fs6LW E5F1PrndB4fGw9SfyloUXOTiY9aVlbiTcnOpSiz+to4C6FYbCm4akLaD8I+O1WT3jR82M9SD xl+WidzpR+hLV11UQEik4A+WybRnmWc5dSxw4hLHnhaRv47ScV8+M9/Rb42wgmGUF0l/Is4j mcOAGqErKo5jvovJ4ztbbOc/3sFEC42+lQG8edUWbk3Mj5WW1l/4bWcMPKx3K07xBQKy9wkf oL7zeIMsFyTv9/tQHYmW7iBdx7s/puUjcWZ9AT3HkZNdALHkPvyeNn9XrmT8hdFQnN2X5+AN FztEsS5+FTdPgQhvA8jSH5klQjP7iKfFd6MSKJBgZYwEanhsUrJ646xiNYbkL8oSovwnZzrd ZtJVCK2IrdLU7rR5u1mKZn2LoannfFWKIpgWyC//mh62i88zKYxer6mg//mmlvSNnl+A/aiK xdVfBzMSOHp2T3XivtPF8MBP+lmkxeJJP3nlywzJ/V038q/SPZge8W0yaV+ihC7tX7j6b2D2 c3EvJCLGh7D+QbLykZ+FkbNF0l+BdnpghOykB+GSfg7mU5TavwARAQABzTlBbmthbiBCaXN3 YXMgKGVuY3lwdGVkIGxrbWwgbWFpbCkgPHNweWpldGZheWVkQGdtYWlsLmNvbT7CwZQEEwEK AD4WIQTKUU3t0nYTlFBmzE6tmR8C+LrwuQUCaHzpOgIbAwUJA8JnAAULCQgHAgYVCgkICwIE FgIDAQIeAQIXgAAKCRCtmR8C+LrwuVlkD/9oLaRXdTuYXcEaESvpzyF3NOGj6SJQZWBxbcIN 1m6foBIK3Djqi872AIyzBll9o9iTsS7FMINgWyBqeXEel1HJCRA5zto8G9es8NhPXtpMVLdi qmkoSQQrUYkD2Kqcwc3FxbG1xjCQ4YWxALl08Bi7fNP8EO2+bWM3vYU52qlQ/PQDagibW5+W NnpUObsFTq1OqYJuUEyq3cQAB5c+2n59U77RJJrxIfPc1cl9l8jEuu1rZEZTQ0VlU2ZpuX6l QJTdX5ypUAuHj9UQdwoCaKSOKdr9XEXzUfr9bHIdsEtFEhrhK35IXpfPSU8Vj5DucDcEG95W Jiqd4l82YkIdvw7sRQOZh4hkzTewfiynbVd1R+IvMxASfqZj4u0E585z19wq0vbu7QT7TYni F01FsRThWy1EPlr0HFbyv16VYf//IqZ7Y0xQDyH/ai37jez2fAKBMYp3Y1Zo2cZtOU94yBY1 veXb1g3fsZKyKC09S2Cqu8g8W7s0cL4Rdl/xwvxNq02Rgu9AFYxwaH0BqrzmbwB4XJTwlf92 UF+nv91lkeYcLqn70xoI4L2w0XQlAPSpk8Htcr1d5X7lGjcSLi9eH5snh3LzOArzCMg0Irn9 jrSUZIxkTiL5KI7O62v8Bv3hQIMPKVDESeAmkxRwnUzHt1nXOIn1ITI/7TvjQ57DLelYac7B TQRofOk6ARAAuhD+a41EULe8fDIMuHn9c4JLSuJSkQZWxiNTkX1da4VrrMqmlC5D0Fnq5vLt F93UWitTTEr32DJN/35ankfYDctDNaDG/9sV5qenC7a5cx9uoyOdlzpHHzktzgXRNZ1PYN5q 92oRYY8hCsJLhMhF1nbeFinWM8x2mXMHoup/d4NhPDDNyPLkFv4+MgltLIww/DEmz8aiHDLh oymdh8/2CZtqbW6qR0LEnGXAkM3CNTyTYpa5C4bYb9AHQyLNWBhH5tZ5QjohWMVF4FMiOwKz IVRAcwvjPu7FgF2wNXTTQUhaBOiXf5FEpU0KGcf0oj1Qfp0GoBfLf8CtdH7EtLKKpQscLT3S om+uQXi/6UAUIUVBadLbvDqNIPLxbTq9c1bmOzOWpz3VH2WBn8JxAADYNAszPOrFA2o5eCcx fWb+Pk6CeLk0L9451psQgucIKhdZR8iDnlBoWSm4zj3DG/rWoELc1T6weRmJgVP2V9mY3Vw7 k1c1dSqgDsMIcQRRh9RZrp0NuJN/NiL4DN+tXyyk35Dqc39Sq0DNOkmUevH3UI8oOr1kwzw5 gKHdPiFQuRH06sM8tpGH8NMu0k2ipiTzySWTnsLmNpgmm/tE9I/Hd4Ni6c+pvzefPB4+z5Wm ilI0z2c3xYeqIpRllIhBMYfq4ikmXmI3BLE7nm9J6PXBAiUAEQEAAcLBfAQYAQoAJhYhBMpR Te3SdhOUUGbMTq2ZHwL4uvC5BQJofOk6AhsMBQkDwmcAAAoJEK2ZHwL4uvC51RoQAKd882H+ QGtSlq0It1lzRJXrUvrIMQS4oN1htY6WY7KHR2Et8JjVnoCBL4fsI2+duLnqu7IRFhZZQju7 BAloAVjdbSCVjugWfu27lzRCc9zlqAmhPYdYKma1oQkEHeqhmq/FL/0XLvEaPYt689HsJ/e4 2OLt5TG8xFnhPAp7I/KaXV7WrUEvhP0a/pKcMKXzpmOwR0Cnn5Mlam+6yU3F4JPXovZEi0ge 0J4k6IMvtTygVEzOgebDjDhFNpPkaX8SfgrpEjR5rXVLQZq3Pxd6XfBzIQC8Fx55DC+1V/w8 IixGOVlLYC04f8ZfZ4hS5JDJJDIfi1HH5vMEEk8m0G11MC7KhSC0LoXCWV7cGWTzoL//0D1i h6WmBb2Is8SfvaZoSYzbTjDUoO7ZfyxNmpEbgOBuxYMH/LUkfJ1BGn0Pm2bARzaUXuS/GB2A nIFlsrNpHHpc0+PpxRe8D0/O3Q4mVHrF+ujzFinuF9qTrJJ74ITAnP4VPt5iLd72+WL3qreg zOgxRjMdaLwpmvzsN46V2yaAhccU52crVzB5ejy53pojylkCgwGqS+ri5lN71Z1spn+vPaNX OOgFpMpgUPBst3lkB2SaANTxzGJe1LUliUKi3IHJzu+W2lQnQ1i9JIvFj55qbiw44n2WNGDv TRpGew2ozniUMliyaLH9UH6/e9Us In-Reply-To: <20251013183800.7af293f5.lasse.collin@tukaani.org> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit On 10/13/25 9:08 PM, Lasse Collin wrote: > On 2025-10-13 Ankan Biswas wrote: >> Support for the IA-64 (Itanium) architecture was removed in >> commit cf8e8658100d ("arch: Remove Itanium (IA-64) architecture"). >> >> This patch drops the IA-64 specific decompression code from >> lib/xz, which was conditionally compiled with the now-obsolete >> CONFIG_XZ_DEC_IA64 option. > > The commit cf8e8658100d ("arch: Remove Itanium (IA-64) architecture") > unconditionally disabled the IA-64 filter, which effectively dropped > support for mounting Squashfs file systems that use XZ with the IA-64 > filter. I wasn't Cc'ed when it was committed because I wasn't in > MAINTAINERS back then. If I had been, I might have commented that the > commits [1] and [2] and the discussion [3] showed that keeping filters > available for non-native archs can be desirable. But now that time has > passed and no one has complained about the lack of IA-64 filter, it > seems fine to remove it completely from Linux. > > I won't remove the IA-64 filter from the upstream version of > xz_dec_bcj.c, so this change will make those files diverge a little > more. That's unfortunate, but they already differ by a tiny amount > anyway. > > xz_private.h line 106 checks if XZ_DEC_IA64 is defined. That line > should be removed too. With that change: > > Acked-by: Lasse Collin > > [1] 5dc49c75a26b ("decompressors: make the default XZ_DEC_* config > match the selected architecture") > [2] bf4d064d89ae ("lib/xz: enable all filters by default in Kconfig") > [3] https://lore.kernel.org/lkml/20140228230017.GE14970@merlin.infradead.org/T/ > Hi Lasse, I have sent a v2 of the patch with the required changes. Sorry about having to make your work a little more difficult. And thanks for retaining support in the upstream for IA-64. Regards, Ankan Biswas