+ Nemanja On Mon, Oct 11, 2021 at 3:01 AM Heiko Carstens <hca@xxxxxxxxxxxxx> wrote: > > On Mon, Oct 11, 2021 at 11:47:42AM +0530, Naresh Kamboju wrote: > > [Please ignore this email if it is already reported ] > > > > Following s390 builds failed due to warnings / errors. > > > > metadata: > > git_describe: v5.15-rc5 > > git_repo: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git > > git_short_log: 64570fbc14f8 (\"Linux 5.15-rc5\") > > target_arch: s390 > > toolchain: clang-13 > > > > > > Fail (2861 errors) s390 (tinyconfig) with clang-nightly > > @ https://builds.tuxbuild.com/1zL35IUSGhDGeVuyIrAp7eyzEUi/ > > Fail (2861 errors) s390 (tinyconfig) with clang-13 > > @ https://builds.tuxbuild.com/1zL35Hn7wjErKsLDM6zAgh27BYJ/ > > Fail (4112 errors) s390 (allnoconfig) with clang-13 > > @ https://builds.tuxbuild.com/1zL35HR60hSFvBmAcYJvKHm8Lko/ > > Fail (4112 errors) s390 (allnoconfig) with clang-nightly > > @ https://builds.tuxbuild.com/1zL35DTlrX9qRGCtGqgtmmMDjnQ/ > > Fail (23048 errors) s390 (defconfig) with clang-13 > > @ https://builds.tuxbuild.com/1zL35DE2KWQUPxbbXeTbwIJaWXS/ > > Fail (23045 errors) s390 (defconfig) with clang-nightly > > @ https://builds.tuxbuild.com/1zL35EgeQfWQDXDupp4itkUO5At/ > > > > > > Build errors log: > > ---------------- > > arch/s390/kernel/head64.S:24:17: error: invalid operand for instruction > > lctlg %c0,%c15,.Lctl-.LPG1(%r13) # load control registers > > ^ > > arch/s390/kernel/head64.S:40:8: error: invalid operand for instruction > > lpswe .Ldw-.(%r13) # load disabled wait psw > > You need to pass LLVM_IAS=0 on the make command line on s390 since > commit f12b034afeb3 ("scripts/Makefile.clang: default to LLVM_IAS=1"). > > LLVM's integrated assembler doesn't seem to work well when compiling > the kernel for s390 yet. Dunno if you folks have cycles to work on it, but if you do, we have just a handful of bugs left in Clang's assembler (or kernel source issues) preventing us from assembling the kernel with clang for SystemZ and PPC. s390: https://github.com/ClangBuiltLinux/linux/issues?q=is%3Aopen+is%3Aissue+label%3A%22%5BARCH%5D+s390%22+label%3A%22%5BTOOL%5D+integrated-as%22 ppc: https://github.com/ClangBuiltLinux/linux/issues?q=is%3Aopen+is%3Aissue+label%3A%22%5BTOOL%5D+integrated-as%22+label%3A%22%5BARCH%5D+powerpc%22 I'm happy to hop on a call to discuss these more. We have all other architectures working here, in the sense that if we can build them with clang, we're using the integrated assembler by default. -- Thanks, ~Nick Desaulniers
