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Fri, 14 May 2021 19:45:17 +0000 Received: from BYAPR12MB3479.namprd12.prod.outlook.com ([fe80::d1a0:ed05:b9cc:e94d]) by BYAPR12MB3479.namprd12.prod.outlook.com ([fe80::d1a0:ed05:b9cc:e94d%7]) with mapi id 15.20.4108.036; Fri, 14 May 2021 19:45:17 +0000 X-SNPS-Relay: synopsys.com From: Vineet Gupta To: Linus Torvalds , Vineet Gupta CC: Arnd Bergmann , linux-arch , Arnd Bergmann , Amitkumar Karwar , Benjamin Herrenschmidt , Borislav Petkov , Eric Dumazet , Florian Fainelli , Ganapathi Bhat , Geert Uytterhoeven , "H. 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Hallyn" , Sharvari Harisangam , Stafford Horne , Stefan Kristiansson , Thomas Gleixner , Vladimir Oltean , Xinming Hu , Yoshinori Sato , the arch/x86 maintainers , Linux Kernel Mailing List , Linux ARM , linux-m68k , Linux Crypto Mailing List , "openrisc@lists.librecores.org" , linuxppc-dev , Linux-sh list , linux-sparc , "linux-ntfs-dev@lists.sourceforge.net" , linux-block , linux-wireless , Netdev , LSM List Subject: Re: [PATCH v2 00/13] Unify asm/unaligned.h around struct helper Thread-Topic: [PATCH v2 00/13] Unify asm/unaligned.h around struct helper Thread-Index: AQHXSKg19FKoFxcBX0+yXT8p8kMtfqrjPPKAgAAWKgCAAAiYAIAABkwA Date: Fri, 14 May 2021 19:45:16 +0000 Message-ID: <14016937-b9c3-c131-db18-f97081806c7f@synopsys.com> References: <20210514100106.3404011-1-arnd@kernel.org> <2408c893-4ae7-4f53-f58c-497c91f5b034@synopsys.com> In-Reply-To: Accept-Language: en-US Content-Language: en-US X-MS-Has-Attach: X-MS-TNEF-Correlator: user-agent: Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.8.1 authentication-results: linux-foundation.org; 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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org On 5/14/21 12:22 PM, Linus Torvalds wrote: > On Fri, May 14, 2021 at 11:52 AM Vineet Gupta > wrote: >> Wasn't the new zlib code slated for 5.14. I don't see it in your master yet > You're right, I never actually committed it, since it was specific to > ARC and -O3 Well, not really, the issue manifested in ARC O3 testing, but I showed the problem existed for arm64 gcc too. > and I wasn't entirely happy with the amount of testing it > got (with Heiko pointing out that the s390 stuff needed more fixes for > the change). With his addon patch everything seemed hunky dory. > The patch below is required on top of your patch to make it compile > for s390 as well. > Tested with kernel image decompression, and also btrfs with file > compression; both software and hardware compression. > Everything seems to work. > So in fact it's not even queued up for 5.14 due to this all, I just dropped it. But Why. Can't we throw it in linux-next for 5.14. I promise to test it - and will likely hit any corner cases. Also for the time being we could force just that file/files to build for -O3 to stress test the aspects that were fragile. >>> and the biggy >>> case didn't even use "get_unaligned()"). >> Indeed this series is sort of orthogonal to that bug, but IMO that bug >> still exists in 5.13 for -O3 build, granted that is not enabled for !ARC. > Right, the zlib bug is still there. > > But Arnd's series wouldn't even fix it: right now inffast has its own > - ugly and slow - special 2-byte-only version of "get_unaligned()", > called "get_unaligned16()". I know that's why said they are orthogonal. > And because it's ugly and slow, it's not actually used for > CONFIG_HAVE_EFFICIENT_UNALIGNED_ACCESS. > > Vineet - maybe the fix is to not take my patch to update to a newer > zlib, but to just fix inffast to use the proper get_unaligned(). Then > Arnd's series _would_ actually fix all this.. OK if you say so. -Vineet _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel