[vfs:untested-uaccess 19/79] do_mounts.c:(.text+0x34): multiple definition of `raw_copy_to_user'

[kbuild test robot <fengguang.wu@xxxxxxxxx>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/viro/vfs.git untested-uaccess
head:   e4c5cc79ec8eab6bc3e74d9994b33f368f137223
commit: d6ff461e878f092d68bd25b9cb41c05e4a92fa1e [19/79] arm: switch to RAW_COPY_USER
config: arm-allnoconfig (attached as .config)
compiler: arm-linux-gnueabi-gcc (Debian 6.1.1-9) 6.1.1 20160705
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        git checkout d6ff461e878f092d68bd25b9cb41c05e4a92fa1e
        # save the attached .config to linux build tree
        make.cross ARCH=arm 

All error/warnings (new ones prefixed by >>):

   In file included from include/linux/uaccess.h:13:0,
                    from include/linux/poll.h:11,
                    from include/linux/ring_buffer.h:7,
                    from include/linux/trace_events.h:5,
                    from include/trace/syscall.h:6,
                    from include/linux/syscalls.h:82,
                    from init/main.c:20:
>> arch/arm/include/asm/uaccess.h:508:1: warning: return type defaults to 'int' [-Wreturn-type]
    raw_copy_to_user(void __user *to, const void *from, unsigned long n)
    ^~~~~~~~~~~~~~~~
--
   init/mounts.o: In function `raw_copy_to_user':
>> do_mounts.c:(.text+0x34): multiple definition of `raw_copy_to_user'
   init/main.o:main.c:(.text+0x20): first defined here
   init/noinitramfs.o: In function `raw_copy_to_user':
   noinitramfs.c:(.text+0x0): multiple definition of `raw_copy_to_user'
   init/main.o:main.c:(.text+0x20): first defined here
   init/init_task.o: In function `raw_copy_to_user':
   init_task.c:(.text+0x0): multiple definition of `raw_copy_to_user'
   init/main.o:main.c:(.text+0x20): first defined here
--
   In file included from include/linux/uaccess.h:13:0,
                    from arch/arm/mm/fault.c:17:
>> arch/arm/include/asm/uaccess.h:508:1: warning: return type defaults to 'int' [-Wreturn-type]
    raw_copy_to_user(void __user *to, const void *from, unsigned long n)
    ^~~~~~~~~~~~~~~~
   arch/arm/mm/fault.c: In function '__do_kernel_fault':
   arch/arm/mm/fault.c:139:6: error: implicit declaration of function 'fixup_exception' [-Werror=implicit-function-declaration]
     if (fixup_exception(regs))
         ^~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors

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

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