Re: [linux-next:master 8545/12022] ld.lld: error: arch/powerpc/built-in.a(kernel/exceptions-64e.o):(.text+0x2576): unknown relocation (110) against symbol interrupt_base_book3e

[Philip Li <philip.li@intel.com>]

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On Tue, Feb 23, 2021 at 02:09:53PM -0800, Nick Desaulniers wrote:
> On Tue, Feb 23, 2021 at 1:51 PM 'Fangrui Song' via Clang Built Linux
> <clang-built-linux@googlegroups.com> wrote:
> >
> > On 2021-02-22, kernel test robot wrote:
> > >CC: Linux Memory Management List <linux-mm@kvack.org>
> > >TO: Nicholas Piggin <npiggin@gmail.com>
> > >CC: Michael Ellerman <mpe@ellerman.id.au>
> > >
> > >Hi Nicholas,
> > >
> > >First bad commit (maybe != root cause):
> > >
> > >tree:   https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git master
> > >head:   37dfbfbdca66834bc0f64ec9b35e09ac6c8898da
> > >commit: 755d664174463791489dddf34c33308b61de68c3 [8545/12022] powerpc: DebugException remove args
> > >config: powerpc-randconfig-r026-20210222 (attached as .config)
> > >compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project c9439ca36342fb6013187d0a69aef92736951476)
> > >reproduce (this is a W=1 build):
> > >        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
> > >        chmod +x ~/bin/make.cross
> > >        # install powerpc cross compiling tool for clang build
> > >        # apt-get install binutils-powerpc-linux-gnu
> > >        # https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git/commit/?id=755d664174463791489dddf34c33308b61de68c3
> > >        git remote add linux-next https://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git
> > >        git fetch --no-tags linux-next master
> > >        git checkout 755d664174463791489dddf34c33308b61de68c3
> > >        # save the attached .config to linux build tree
> > >        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=powerpc
> > >
> > >If you fix the issue, kindly add following tag as appropriate
> > >Reported-by: kernel test robot <lkp@intel.com>
> > >
> > >All errors (new ones prefixed by >>):
> > >
> > >   ld.lld: error: arch/powerpc/built-in.a(kernel/exceptions-64e.o):(.text+0x23EE): unknown relocation (110) against symbol interrupt_base_book3e
> > >   ld.lld: error: arch/powerpc/built-in.a(kernel/exceptions-64e.o):(.text+0x2406): unknown relocation (110) against symbol __end_interrupts
> > >>> ld.lld: error: arch/powerpc/built-in.a(kernel/exceptions-64e.o):(.text+0x2576): unknown relocation (110) against symbol interrupt_base_book3e
> > >>> ld.lld: error: arch/powerpc/built-in.a(kernel/exceptions-64e.o):(.text+0x258E): unknown relocation (110) against symbol __end_interrupts
> > >   ld.lld: error: arch/powerpc/built-in.a(kernel/exceptions-64e.o):(.text+0x37F2): unknown relocation (110) against symbol
> > >   ld.lld: error: undefined symbol: .early_setup
> > >   >>> referenced by arch/powerpc/kernel/head_64.o:(.ref.text+0x5A)
> > >   >>> did you mean: early_setup
> > >   >>> defined in: arch/powerpc/built-in.a(kernel/setup_64.o)
> > >
> > >Kconfig warnings: (for reference only)
> > >   WARNING: unmet direct dependencies detected for HOTPLUG_CPU
> > >   Depends on SMP && (PPC_PSERIES || PPC_PMAC || PPC_POWERNV || FSL_SOC_BOOKE
> > >   Selected by
> > >   - PM_SLEEP_SMP && SMP && (ARCH_SUSPEND_POSSIBLE || ARCH_HIBERNATION_POSSIBLE && PM_SLEEP
> >
> > 110 is R_PPC64_ADDR16_HIGH.
> > This is https://github.com/ClangBuiltLinux/linux/issues/1260
> >
> > A newer LLD 12.0.0 (llvmorg-12-init-17087-g5fcb412ed083) supports R_PPC64_ADDR16_HIGH.
> > llvmorg-12-init-17023-gc9439ca36342 used by the bot does not have R_PPC64_ADDR16_HIGH support.
> 
> Thanks Fangrui for verifying.  Philip, clang-12 is not yet released
> and is still landing fixes.  Can the version used by 0day bot be
> upgraded? Top of Tree LLVM will be clang-13, so both branches are
got it, we will upgrade the clang compiler asap.

> actively landing patches.  When clang-12 is officially released, there
> will be a point release 6 months later, clang-13 will branch, and
> clang-14 will eventually ship as what's ToT.
> 
> >
> > >---
> > >0-DAY CI Kernel Test Service, Intel Corporation
> > >https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org
> > >
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> >
> >
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> 
> 
> 
> -- 
> Thanks,
> ~Nick Desaulniers