[kbuild:for-next 13/15] arch/ia64/kernel/crash.c:79:1: warning: no previous prototype for 'machine_crash_shutdown'

[kernel test robot <lkp@intel.com>]

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tree:   https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git for-next
head:   49362029a00b1c8af81d635333806e3d0dc8fdc1
commit: 092d5045cefaf39a0c8ea8a20ccd640a038dac32 [13/15] ia64: remove unneeded header includes from <asm/mca.h>
config: ia64-randconfig-r013-20210209 (attached as .config)
compiler: ia64-linux-gcc (GCC) 9.3.0
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
        # https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git/commit/?id=092d5045cefaf39a0c8ea8a20ccd640a038dac32
        git remote add kbuild https://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild.git
        git fetch --no-tags kbuild for-next
        git checkout 092d5045cefaf39a0c8ea8a20ccd640a038dac32
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64 

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

All warnings (new ones prefixed by >>):

>> arch/ia64/kernel/crash.c:79:1: warning: no previous prototype for 'machine_crash_shutdown' [-Wmissing-prototypes]
      79 | machine_crash_shutdown(struct pt_regs *pt)
         | ^~~~~~~~~~~~~~~~~~~~~~


vim +/machine_crash_shutdown +79 arch/ia64/kernel/crash.c

a79561134f38de Zou Nan hai    2006-12-07   77  
a79561134f38de Zou Nan hai    2006-12-07   78  void
a79561134f38de Zou Nan hai    2006-12-07  @79  machine_crash_shutdown(struct pt_regs *pt)
a79561134f38de Zou Nan hai    2006-12-07   80  {
a79561134f38de Zou Nan hai    2006-12-07   81  	/* This function is only called after the system
a79561134f38de Zou Nan hai    2006-12-07   82  	 * has paniced or is otherwise in a critical state.
a79561134f38de Zou Nan hai    2006-12-07   83  	 * The minimum amount of code to allow a kexec'd kernel
a79561134f38de Zou Nan hai    2006-12-07   84  	 * to run successfully needs to happen here.
a79561134f38de Zou Nan hai    2006-12-07   85  	 *
a79561134f38de Zou Nan hai    2006-12-07   86  	 * In practice this means shooting down the other cpus in
a79561134f38de Zou Nan hai    2006-12-07   87  	 * an SMP system.
a79561134f38de Zou Nan hai    2006-12-07   88  	 */
a79561134f38de Zou Nan hai    2006-12-07   89  	kexec_disable_iosapic();
a79561134f38de Zou Nan hai    2006-12-07   90  #ifdef CONFIG_SMP
1726b0883dd086 Hidetoshi Seto 2009-08-06   91  	/*
1726b0883dd086 Hidetoshi Seto 2009-08-06   92  	 * If kdump_on_init is set and an INIT is asserted here, kdump will
1726b0883dd086 Hidetoshi Seto 2009-08-06   93  	 * be started again via INIT monarch.
1726b0883dd086 Hidetoshi Seto 2009-08-06   94  	 */
1726b0883dd086 Hidetoshi Seto 2009-08-06   95  	local_irq_disable();
1726b0883dd086 Hidetoshi Seto 2009-08-06   96  	ia64_set_psr_mc();	/* mask MCA/INIT */
1726b0883dd086 Hidetoshi Seto 2009-08-06   97  	if (atomic_inc_return(&kdump_in_progress) != 1)
1726b0883dd086 Hidetoshi Seto 2009-08-06   98  		unw_init_running(kdump_cpu_freeze, NULL);
1726b0883dd086 Hidetoshi Seto 2009-08-06   99  
1726b0883dd086 Hidetoshi Seto 2009-08-06  100  	/*
1726b0883dd086 Hidetoshi Seto 2009-08-06  101  	 * Now this cpu is ready for kdump.
1726b0883dd086 Hidetoshi Seto 2009-08-06  102  	 * Stop all others by IPI or INIT.  They could receive INIT from
1726b0883dd086 Hidetoshi Seto 2009-08-06  103  	 * outside and might be INIT monarch, but only thing they have to
1726b0883dd086 Hidetoshi Seto 2009-08-06  104  	 * do is falling into kdump_cpu_freeze().
1726b0883dd086 Hidetoshi Seto 2009-08-06  105  	 *
1726b0883dd086 Hidetoshi Seto 2009-08-06  106  	 * If an INIT is asserted here:
1726b0883dd086 Hidetoshi Seto 2009-08-06  107  	 * - All receivers might be slaves, since some of cpus could already
1726b0883dd086 Hidetoshi Seto 2009-08-06  108  	 *   be frozen and INIT might be masked on monarch.  In this case,
0cced40e7c58b1 Hidetoshi Seto 2009-08-06  109  	 *   all slaves will be frozen soon since kdump_in_progress will let
0cced40e7c58b1 Hidetoshi Seto 2009-08-06  110  	 *   them into DIE_INIT_SLAVE_LEAVE.
1726b0883dd086 Hidetoshi Seto 2009-08-06  111  	 * - One might be a monarch, but INIT rendezvous will fail since
1726b0883dd086 Hidetoshi Seto 2009-08-06  112  	 *   at least this cpu already have INIT masked so it never join
1726b0883dd086 Hidetoshi Seto 2009-08-06  113  	 *   to the rendezvous.  In this case, all slaves and monarch will
0cced40e7c58b1 Hidetoshi Seto 2009-08-06  114  	 *   be frozen soon with no wait since the INIT rendezvous is skipped
0cced40e7c58b1 Hidetoshi Seto 2009-08-06  115  	 *   by kdump_in_progress.
1726b0883dd086 Hidetoshi Seto 2009-08-06  116  	 */
a79561134f38de Zou Nan hai    2006-12-07  117  	kdump_smp_send_stop();
0ac1faca4a63fc Simon Horman   2007-02-14  118  	/* not all cpu response to IPI, send INIT to freeze them */
5959906ee9dee6 Hidetoshi Seto 2009-08-06  119  	if (kdump_wait_cpu_freeze()) {
a79561134f38de Zou Nan hai    2006-12-07  120  		kdump_smp_send_init();
5959906ee9dee6 Hidetoshi Seto 2009-08-06  121  		/* wait again, don't go ahead if possible */
5959906ee9dee6 Hidetoshi Seto 2009-08-06  122  		kdump_wait_cpu_freeze();
a79561134f38de Zou Nan hai    2006-12-07  123  	}
a79561134f38de Zou Nan hai    2006-12-07  124  #endif
a79561134f38de Zou Nan hai    2006-12-07  125  }
a79561134f38de Zou Nan hai    2006-12-07  126  

:::::: The code at line 79 was first introduced by commit
:::::: a79561134f38de12dce14ed72138f38e55ef53fc [IA64] IA64 Kexec/kdump

:::::: TO: Zou Nan hai <nanhai.zou@intel.com>
:::::: CC: Tony Luck <tony.luck@intel.com>

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

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