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Date:   Sun, 12 Feb 2017 09:28:17 +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 74/154] arch/sh/kernel/cpu/sh4/fpu.c:428:2:
 error: implicit declaration of function 'force_sig'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core
head:   12372f63e2728a509817b56878cd6633d92053b3
commit: 3cff44a935eba893a68a1bcb3ee7e90cbbbabbb7 [74/154] sched/headers: Move task_struct::signal and task_struct::sighand types and accessors into <linux/sched/signal.h>
config: sh-sh2007_defconfig (attached as .config)
compiler: sh4-linux-gnu-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 3cff44a935eba893a68a1bcb3ee7e90cbbbabbb7
        # save the attached .config to linux build tree
        make.cross ARCH=sh 

All errors (new ones prefixed by >>):

   arch/sh/kernel/cpu/sh4/fpu.c: In function 'fpu_error_trap_handler':
>> arch/sh/kernel/cpu/sh4/fpu.c:428:2: error: implicit declaration of function 'force_sig' [-Werror=implicit-function-declaration]
     force_sig(SIGFPE, tsk);
     ^~~~~~~~~
   cc1: some warnings being treated as errors

vim +/force_sig +428 arch/sh/kernel/cpu/sh4/fpu.c

0ea820cf Paul Mundt     2010-01-13  422  		if ((((tsk->thread.xstate->hardfpu.fpscr & FPSCR_ENABLE_MASK) >> 7) &
c8c0a1ab Stuart Menefy  2007-11-30  423  		     (fpu_exception_flags >> 2)) == 0) {
^1da177e Linus Torvalds 2005-04-16  424  			return;
c8c0a1ab Stuart Menefy  2007-11-30  425  		}
c8c0a1ab Stuart Menefy  2007-11-30  426  	}
^1da177e Linus Torvalds 2005-04-16  427  
^1da177e Linus Torvalds 2005-04-16 @428  	force_sig(SIGFPE, tsk);
^1da177e Linus Torvalds 2005-04-16  429  }

:::::: The code at line 428 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>

---
0-DAY kernel test infrastructure                Open Source Technology Center
https://lists.01.org/pipermail/kbuild-all                   Intel Corporation

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