linux-kernel - [tip:WIP.sched/core 101/151] arch/mips/sgi-ip32/ip32-berr.c:30:2: error: implicit declaration of function 'force

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Date:   Mon, 6 Feb 2017 04:25:17 +0800
From:   kbuild test robot <fengguang.wu@...el.com>
To:     Ingo Molnar <mingo@...nel.org>
Cc:     kbuild-all@...org, linux-kernel@...r.kernel.org, tipbuild@...or.com
Subject: [tip:WIP.sched/core 101/151] arch/mips/sgi-ip32/ip32-berr.c:30:2:
 error: implicit declaration of function 'force_sig'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core
head:   b992c433b3544d3afd09c4ea603768e6486a3e29
commit: b1f67840abd11c21066791dab0ba74aac94fd178 [101/151] sched/headers, signals: Separate out task_struct::signal and task_struct::sighand types and accessors into <linux/sched/signal.h>
config: mips-ip32_defconfig (attached as .config)
compiler: mips64-linux-gnuabi64-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout b1f67840abd11c21066791dab0ba74aac94fd178
        # save the attached .config to linux build tree
        make.cross ARCH=mips 

All errors (new ones prefixed by >>):

   arch/mips/sgi-ip32/ip32-berr.c: In function 'ip32_be_handler':
>> arch/mips/sgi-ip32/ip32-berr.c:30:2: error: implicit declaration of function 'force_sig' [-Werror=implicit-function-declaration]
     force_sig(SIGBUS, current);
     ^~~~~~~~~
   cc1: some warnings being treated as errors
--
   arch/mips/sgi-ip32/ip32-reset.c: In function 'ip32_prepare_poweroff':
>> arch/mips/sgi-ip32/ip32-reset.c:95:23: error: implicit declaration of function 'kill_cad_pid' [-Werror=implicit-function-declaration]
     if (shutting_down || kill_cad_pid(SIGINT, 1)) {
                          ^~~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/force_sig +30 arch/mips/sgi-ip32/ip32-berr.c

^1da177e Linus Torvalds 2005-04-16  24  		return MIPS_BE_FIXUP;
^1da177e Linus Torvalds 2005-04-16  25  
^1da177e Linus Torvalds 2005-04-16  26  	printk("Got %cbe at 0x%lx\n", data ? 'd' : 'i', regs->cp0_epc);
^1da177e Linus Torvalds 2005-04-16  27  	show_regs(regs);
^1da177e Linus Torvalds 2005-04-16  28  	dump_tlb_all();
^1da177e Linus Torvalds 2005-04-16  29  	while(1);
^1da177e Linus Torvalds 2005-04-16 @30  	force_sig(SIGBUS, current);
^1da177e Linus Torvalds 2005-04-16  31  }
^1da177e Linus Torvalds 2005-04-16  32  
^1da177e Linus Torvalds 2005-04-16  33  void __init ip32_be_init(void)

:::::: The code at line 30 was first introduced by commit
:::::: 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 Linux-2.6.12-rc2

:::::: TO: Linus Torvalds <torvalds@...970.osdl.org>
:::::: CC: Linus Torvalds <torvalds@...970.osdl.org>

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