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t=1684863927; bh=WDbsACUQd1IF+k1hIhlvOW4slr9SiGw/AoALXjeIN2w=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=Kvu06m8uR/gzHmaMeZ8yskr2pkb8aQ7wjeZgR2gLxnQYsiOBECwlSWO6svIkSzWth Uxg6SfRCkjiME5QNfMVkwh6vNddIO1LFud6Vkbyn9ybAz29qKSYWi5j97gtXjacsWi lcKTtCj1prN+eriMBCCgEGRoECtNkxJQR8vCGQDdf3ainf/r9jeaTOGJkS9Vxsguj9 Y7vulhJUb43smwWq6/hum2HXnSaR7ITnKcocAi+iN5R+4QPGr6jBypWluBwV+YsuHq aPJViChOY61wplkuN5tJ68cIR2l4OCWRouhOQvxQj8aabWwh38HiwYW63SLZcz2KLs FRsDD3RMLCVQg== Date: Tue, 23 May 2023 10:45:25 -0700 From: Nathan Chancellor To: Kees Cook Cc: kernel test robot , llvm@lists.linux.dev, oe-kbuild-all@lists.linux.dev, Greg Kroah-Hartman , Marco Elver , Andrew Morton , Linux Memory Management List Subject: Re: [stable:linux-5.15.y 36/9999] arch/s390/kernel/vtime.c:132:2: error: expected absolute expression Message-ID: <20230523174525.GA1388474@dev-arch.thelio-3990X> References: <202305111705.8j4cTm2s-lkp@intel.com> <202305111519.04845F7@keescook> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <202305111519.04845F7@keescook> X-Rspamd-Queue-Id: 95A76C0017 X-Rspam-User: X-Rspamd-Server: rspam02 X-Stat-Signature: 8nfjni5y4rca5kuf7iyakqos7nfcs346 X-HE-Tag: 1684863929-487869 X-HE-Meta: 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 JPoschhg ZuVYe4Upxit+YaYmqS8oNy65SJppMAQJFuCsO3DOOlqc5rY5knTQ5TFqiUXwZ1+9/+dK9dMNPabloPXbV0MKsCIg8h5WhS7gzaigxcrX36XnHssMshLjpIPd0QUnVgvBd62w2Q44nNMGs4D9eRzM89pZ3B3YGFGrwyA/Q6jhfDOr+3RiLtMCaXqWLK9Irk8oGHzpp0Sj5mmAGj13CHYpfe0v5I7k2AMQYTuf1Nu6NSav+qdcfL2jDUSC+4TRafoJ2onStFSJxDKhEvYalpHMwytnicogLr4K2FuTt4mHCBGonDO1I+oQkICFYiFvmw+X6PtqL46c1eoCO+JzIeF0GaomQpEPpytUjwM887d34U6KVvaKat+IMhOj4MBbGEWW1FmCw9AVUbnCQ6KM= X-Bogosity: Ham, tests=bogofilter, spamicity=0.000000, version=1.2.4 Sender: owner-linux-mm@kvack.org Precedence: bulk X-Loop: owner-majordomo@kvack.org List-ID: On Thu, May 11, 2023 at 03:21:01PM -0700, Kees Cook wrote: > On Thu, May 11, 2023 at 05:14:16PM +0800, kernel test robot wrote: > > FYI, the error/warning still remains. > > > > tree: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git linux-5.15.y > > head: 8a7f2a5c5aa1648edb4f2029c6ec33870afb7a95 > > commit: 33db9912ff7c491f839c89a08e98f755aa09598f [36/9999] ubsan: remove CONFIG_UBSAN_OBJECT_SIZE > > [...] > > >> arch/s390/kernel/vtime.c:132:2: error: cpu alternatives does not support instructions blocks > 254 bytes > > alternative_io("stpt %0\n .insn s,0xb2050000,%1\n", > > ^ > > Thanks for the report! I don't think the new errors are related to this > removal, though. This patch was just disabling a potential build config. Right, I am not really sure how the robot landed on this (perhaps there was another error that was being exposed by CONFIG_UBSAN_OBJECT_SIZE that disappeared with its removal?) but this is a problem with s390 specific code and clang's integrated assembler. I suspect it would be fixed with one of the patches from this series that landed in 5.19 but I have not looked too closely: https://lore.kernel.org/20220511120532.2228616-1-hca@linux.ibm.com/ https://lore.kernel.org/Yot+xzLZETNTxNo+@osiris/ We use LLVM_IAS=0 for s390 on 5.15 in CI, hence why we do not see this. Cheers, Nathan