arch/riscv/kernel/machine_kexec.c:164:1: sparse: void extern [addressable] [noreturn] [toplevel] machine_kexec( ... )

arch/riscv/kernel/machine_kexec.c:164:1: sparse: void extern [addressable] [noreturn] [toplevel] machine_kexec( ... )

[kernel test robot]

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CC: kbuild-all(a)lists.01.org
CC: linux-kernel(a)vger.kernel.org
TO: Nick Kossifidis <mick@ics.forth.gr>
CC: Palmer Dabbelt <palmerdabbelt@google.com>

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
head:   dd860052c99b1e088352bdd4fb7aef46f8d2ef47
commit: fba8a8674f68a0628abae470dfcfbcb4a0d7a79e RISC-V: Add kexec support
date:   11 days ago
:::::: branch date: 5 hours ago
:::::: commit date: 11 days ago
config: riscv-randconfig-s031-20210508 (attached as .config)
compiler: riscv32-linux-gcc (GCC) 9.3.0
reproduce:
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # apt-get install sparse
        # sparse version: v0.6.3-341-g8af24329-dirty
        # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=fba8a8674f68a0628abae470dfcfbcb4a0d7a79e
        git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
        git fetch --no-tags linus master
        git checkout fba8a8674f68a0628abae470dfcfbcb4a0d7a79e
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=riscv 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@intel.com>


sparse warnings: (new ones prefixed by >>)
   arch/riscv/kernel/machine_kexec.c:164:1: sparse: sparse: symbol 'machine_kexec' redeclared with different type (different modifiers):
>> arch/riscv/kernel/machine_kexec.c:164:1: sparse:    void extern [addressable] [noreturn] [toplevel] machine_kexec( ... )
   arch/riscv/kernel/machine_kexec.c: note: in included file:
   include/linux/kexec.h:311:13: sparse: note: previously declared as:
>> include/linux/kexec.h:311:13: sparse:    void extern [addressable] [toplevel] machine_kexec( ... )

vim +164 arch/riscv/kernel/machine_kexec.c

fba8a8674f68a0 Nick Kossifidis 2021-04-19  117  
fba8a8674f68a0 Nick Kossifidis 2021-04-19  118  
fba8a8674f68a0 Nick Kossifidis 2021-04-19  119  /*
fba8a8674f68a0 Nick Kossifidis 2021-04-19  120   * machine_shutdown - Prepare for a kexec reboot
fba8a8674f68a0 Nick Kossifidis 2021-04-19  121   *
fba8a8674f68a0 Nick Kossifidis 2021-04-19  122   * This function is called by kernel_kexec just before machine_kexec
fba8a8674f68a0 Nick Kossifidis 2021-04-19  123   * below. Its goal is to prepare the rest of the system (the other
fba8a8674f68a0 Nick Kossifidis 2021-04-19  124   * harts and possibly devices etc) for a kexec reboot.
fba8a8674f68a0 Nick Kossifidis 2021-04-19  125   */
fba8a8674f68a0 Nick Kossifidis 2021-04-19 @126  void machine_shutdown(void)
fba8a8674f68a0 Nick Kossifidis 2021-04-19  127  {
fba8a8674f68a0 Nick Kossifidis 2021-04-19  128  	/*
fba8a8674f68a0 Nick Kossifidis 2021-04-19  129  	 * No more interrupts on this hart
fba8a8674f68a0 Nick Kossifidis 2021-04-19  130  	 * until we are back up.
fba8a8674f68a0 Nick Kossifidis 2021-04-19  131  	 */
fba8a8674f68a0 Nick Kossifidis 2021-04-19  132  	local_irq_disable();
fba8a8674f68a0 Nick Kossifidis 2021-04-19  133  
fba8a8674f68a0 Nick Kossifidis 2021-04-19  134  #if defined(CONFIG_HOTPLUG_CPU)
fba8a8674f68a0 Nick Kossifidis 2021-04-19  135  	smp_shutdown_nonboot_cpus(smp_processor_id());
fba8a8674f68a0 Nick Kossifidis 2021-04-19  136  #endif
fba8a8674f68a0 Nick Kossifidis 2021-04-19  137  }
fba8a8674f68a0 Nick Kossifidis 2021-04-19  138  
fba8a8674f68a0 Nick Kossifidis 2021-04-19  139  /**
fba8a8674f68a0 Nick Kossifidis 2021-04-19  140   * machine_crash_shutdown - Prepare to kexec after a kernel crash
fba8a8674f68a0 Nick Kossifidis 2021-04-19  141   *
fba8a8674f68a0 Nick Kossifidis 2021-04-19  142   * This function is called by crash_kexec just before machine_kexec
fba8a8674f68a0 Nick Kossifidis 2021-04-19  143   * below and its goal is similar to machine_shutdown, but in case of
fba8a8674f68a0 Nick Kossifidis 2021-04-19  144   * a kernel crash. Since we don't handle such cases yet, this function
fba8a8674f68a0 Nick Kossifidis 2021-04-19  145   * is empty.
fba8a8674f68a0 Nick Kossifidis 2021-04-19  146   */
fba8a8674f68a0 Nick Kossifidis 2021-04-19  147  void
fba8a8674f68a0 Nick Kossifidis 2021-04-19  148  machine_crash_shutdown(struct pt_regs *regs)
fba8a8674f68a0 Nick Kossifidis 2021-04-19  149  {
fba8a8674f68a0 Nick Kossifidis 2021-04-19  150  }
fba8a8674f68a0 Nick Kossifidis 2021-04-19  151  
fba8a8674f68a0 Nick Kossifidis 2021-04-19  152  /**
fba8a8674f68a0 Nick Kossifidis 2021-04-19  153   * machine_kexec - Jump to the loaded kimage
fba8a8674f68a0 Nick Kossifidis 2021-04-19  154   *
fba8a8674f68a0 Nick Kossifidis 2021-04-19  155   * This function is called by kernel_kexec which is called by the
fba8a8674f68a0 Nick Kossifidis 2021-04-19  156   * reboot system call when the reboot cmd is LINUX_REBOOT_CMD_KEXEC,
fba8a8674f68a0 Nick Kossifidis 2021-04-19  157   * or by crash_kernel which is called by the kernel's arch-specific
fba8a8674f68a0 Nick Kossifidis 2021-04-19  158   * trap handler in case of a kernel panic. It's the final stage of
fba8a8674f68a0 Nick Kossifidis 2021-04-19  159   * the kexec process where the pre-loaded kimage is ready to be
fba8a8674f68a0 Nick Kossifidis 2021-04-19  160   * executed. We assume at this point that all other harts are
fba8a8674f68a0 Nick Kossifidis 2021-04-19  161   * suspended and this hart will be the new boot hart.
fba8a8674f68a0 Nick Kossifidis 2021-04-19  162   */
fba8a8674f68a0 Nick Kossifidis 2021-04-19  163  void __noreturn
fba8a8674f68a0 Nick Kossifidis 2021-04-19 @164  machine_kexec(struct kimage *image)

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all(a)lists.01.org

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