linux-kernel - Re: [PATCH 2/2] riscv: kexec: Implement crash_smp_send_stop with percpu crash_save

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Message-ID: <CAJF2gTRA-UfM17jxTn3_Mdf3Xy5Sw9EdhEsA6i6T4veyowYxrg@mail.gmail.com>
Date:   Fri, 19 Aug 2022 08:34:59 +0800
From:   Guo Ren <guoren@...nel.org>
To:     kernel test robot <lkp@...el.com>
Cc:     xianting.tian@...ux.alibaba.com, palmer@...belt.com,
        heiko@...ech.de, llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-arch@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-riscv@...ts.infradead.org, liaochang1@...wei.com,
        mick@....forth.gr, jszhang@...nel.org,
        Guo Ren <guoren@...ux.alibaba.com>,
        AKASHI Takahiro <takahiro.akashi@...aro.org>
Subject: Re: [PATCH 2/2] riscv: kexec: Implement crash_smp_send_stop with
 percpu crash_save_cpu

Thx, It's a bug from !SMP. I would fixup it in the next version.

On Thu, Aug 18, 2022 at 3:58 PM kernel test robot <lkp@...el.com> wrote:
>
> Hi,
>
> I love your patch! Yet something to improve:
>
> [auto build test ERROR on linus/master]
> [also build test ERROR on v6.0-rc1 next-20220818]
> [If your patch is applied to the wrong git tree, kindly drop us a note.
> And when submitting patch, we suggest to use '--base' as documented in
> https://git-scm.com/docs/git-format-patch#_base_tree_information]
>
> url:    https://github.com/intel-lab-lkp/linux/commits/guoren-kernel-org/riscv-kexec-Support-crash_save-percpu-and-machine_kexec_mask_interrupts/20220816-144442
> base:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git 568035b01cfb107af8d2e4bd2fb9aea22cf5b868
> config: riscv-randconfig-r035-20220818 (https://download.01.org/0day-ci/archive/20220818/202208181520.fYQOePu6-lkp@intel.com/config)
> compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project aed5e3bea138ce581d682158eb61c27b3cfdd6ec)
> 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 riscv cross compiling tool for clang build
>         # apt-get install binutils-riscv64-linux-gnu
>         # https://github.com/intel-lab-lkp/linux/commit/0abdaf7e1f44634e1cee484e3cf01b7e8c851950
>         git remote add linux-review https://github.com/intel-lab-lkp/linux
>         git fetch --no-tags linux-review guoren-kernel-org/riscv-kexec-Support-crash_save-percpu-and-machine_kexec_mask_interrupts/20220816-144442
>         git checkout 0abdaf7e1f44634e1cee484e3cf01b7e8c851950
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=riscv SHELL=/bin/bash arch/riscv/kernel/
>
> If you fix the issue, kindly add following tag where applicable
> Reported-by: kernel test robot <lkp@...el.com>
>
> All errors (new ones prefixed by >>):
>
> >> arch/riscv/kernel/machine_kexec.c:217:7: error: call to undeclared function 'smp_crash_stop_failed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
>            WARN(smp_crash_stop_failed(),
>                 ^
>    1 error generated.
>
>
> vim +/smp_crash_stop_failed +217 arch/riscv/kernel/machine_kexec.c
>
>    193
>    194  /*
>    195   * machine_kexec - Jump to the loaded kimage
>    196   *
>    197   * This function is called by kernel_kexec which is called by the
>    198   * reboot system call when the reboot cmd is LINUX_REBOOT_CMD_KEXEC,
>    199   * or by crash_kernel which is called by the kernel's arch-specific
>    200   * trap handler in case of a kernel panic. It's the final stage of
>    201   * the kexec process where the pre-loaded kimage is ready to be
>    202   * executed. We assume at this point that all other harts are
>    203   * suspended and this hart will be the new boot hart.
>    204   */
>    205  void __noreturn
>    206  machine_kexec(struct kimage *image)
>    207  {
>    208          struct kimage_arch *internal = &image->arch;
>    209          unsigned long jump_addr = (unsigned long) image->start;
>    210          unsigned long first_ind_entry = (unsigned long) &image->head;
>    211          unsigned long this_cpu_id = __smp_processor_id();
>    212          unsigned long this_hart_id = cpuid_to_hartid_map(this_cpu_id);
>    213          unsigned long fdt_addr = internal->fdt_addr;
>    214          void *control_code_buffer = page_address(image->control_code_page);
>    215          riscv_kexec_method kexec_method = NULL;
>    216
>  > 217          WARN(smp_crash_stop_failed(),
>
> --
> 0-DAY CI Kernel Test Service
> https://01.org/lkp



-- 
Best Regards
 Guo Ren