linux-kernel - [tip:WIP.sched/core 120/122] drivers/i2c/busses/i2c-ibm_iic.c:438:17: error: implicit declaration of function 'signal

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Date:   Fri, 3 Feb 2017 07:56:50 +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 120/122]
 drivers/i2c/busses/i2c-ibm_iic.c:438:17: error: implicit declaration of
 function 'signal_pending'

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git WIP.sched/core
head:   a69a38e26e87ddbe993e33b55f693405cd62c76f
commit: 88d0fe4cbc5e74cda2764df63cb369f32746af54 [120/122] sched/headers: Move signal wakeup & sigpending methods from <linux/sched.h> into <linux/sched/signal.h>
config: powerpc-ppc44x_defconfig (attached as .config)
compiler: powerpc-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 88d0fe4cbc5e74cda2764df63cb369f32746af54
        # save the attached .config to linux build tree
        make.cross ARCH=powerpc 

All errors (new ones prefixed by >>):

   In file included from include/uapi/linux/stddef.h:1:0,
                    from include/linux/stddef.h:4,
                    from include/uapi/linux/posix_types.h:4,
                    from include/uapi/linux/types.h:13,
                    from include/linux/types.h:5,
                    from include/linux/list.h:4,
                    from include/linux/module.h:9,
                    from drivers/i2c/busses/i2c-ibm_iic.c:34:
   drivers/i2c/busses/i2c-ibm_iic.c: In function 'iic_wait_for_tc':
>> drivers/i2c/busses/i2c-ibm_iic.c:438:17: error: implicit declaration of function 'signal_pending' [-Werror=implicit-function-declaration]
       if (unlikely(signal_pending(current))){
                    ^
   include/linux/compiler.h:168:42: note: in definition of macro 'unlikely'
    # define unlikely(x) __builtin_expect(!!(x), 0)
                                             ^
   cc1: some warnings being treated as errors

vim +/signal_pending +438 drivers/i2c/busses/i2c-ibm_iic.c

^1da177e Linus Torvalds 2005-04-16  432  			if (unlikely(time_after(jiffies, x))){
^1da177e Linus Torvalds 2005-04-16  433  				DBG("%d: poll timeout\n", dev->idx);
^1da177e Linus Torvalds 2005-04-16  434  				ret = -ETIMEDOUT;
^1da177e Linus Torvalds 2005-04-16  435  				break;
^1da177e Linus Torvalds 2005-04-16  436  			}
^1da177e Linus Torvalds 2005-04-16  437  
^1da177e Linus Torvalds 2005-04-16 @438  			if (unlikely(signal_pending(current))){
^1da177e Linus Torvalds 2005-04-16  439  				DBG("%d: poll interrupted\n", dev->idx);
^1da177e Linus Torvalds 2005-04-16  440  				ret = -ERESTARTSYS;
^1da177e Linus Torvalds 2005-04-16  441  				break;

:::::: The code at line 438 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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