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From:   Sami Tolvanen <samitolvanen@google.com>
Date:   Mon, 14 Aug 2023 08:34:37 -0700
Message-ID: <CABCJKueRPOEiRdGoT5A+c3s7zbH3YqvFUcQowwXMUT4CmFyBEw@mail.gmail.com>
Subject: Re: [PATCH 1/5] riscv: VMAP_STACK overflow detection thread-safe
To:     Guo Ren <guoren@kernel.org>
Cc:     Paul Walmsley <paul.walmsley@sifive.com>,
        Palmer Dabbelt <palmer@dabbelt.com>,
        Albert Ou <aou@eecs.berkeley.edu>,
        Kees Cook <keescook@chromium.org>, llvm@lists.linux.dev,
        kernel test robot <lkp@intel.com>,
        oe-kbuild-all@lists.linux.dev, Deepak Gupta <debug@rivosinc.com>,
        Nathan Chancellor <nathan@kernel.org>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Fangrui Song <maskray@google.com>,
        linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
        Jisheng Zhang <jszhang@kernel.org>
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On Sat, Aug 12, 2023 at 6:25=E2=80=AFPM Guo Ren <guoren@kernel.org> wrote:
>
> On Sat, Aug 12, 2023 at 10:36=E2=80=AFPM kernel test robot <lkp@intel.com=
> wrote:
> >
> > Hi Sami,
> >
> > kernel test robot noticed the following build errors:
> >
> > [auto build test ERROR on 52a93d39b17dc7eb98b6aa3edb93943248e03b2f]
> >
> > url:    https://github.com/intel-lab-lkp/linux/commits/Sami-Tolvanen/ri=
scv-VMAP_STACK-overflow-detection-thread-safe/20230812-073751
> > base:   52a93d39b17dc7eb98b6aa3edb93943248e03b2f
> > patch link:    https://lore.kernel.org/r/20230811233556.97161-8-samitol=
vanen%40google.com
> > patch subject: [PATCH 1/5] riscv: VMAP_STACK overflow detection thread-=
safe
> > config: riscv-randconfig-r042-20230812 (https://download.01.org/0day-ci=
/archive/20230812/202308122238.XLMMmeL0-lkp@intel.com/config)
> > compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.gi=
t 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
> > reproduce: (https://download.01.org/0day-ci/archive/20230812/2023081222=
38.XLMMmeL0-lkp@intel.com/reproduce)
> >
> > If you fix the issue in a separate patch/commit (i.e. not just a new ve=
rsion of
> > the same patch/commit), kindly add following tags
> > | Reported-by: kernel test robot <lkp@intel.com>
> > | Closes: https://lore.kernel.org/oe-kbuild-all/202308122238.XLMMmeL0-l=
kp@intel.com/
> >
> > All errors (new ones prefixed by >>):
> >
> > >> ld.lld: error: undefined symbol: __per_cpu_offset
> >    >>> referenced by arch/riscv/kernel/entry.o:(handle_kernel_stack_ove=
rflow) in archive vmlinux.a
> !CONFIG_SMP missed

Indeed. I'll fix this in v2.

Sami