Hi Vitaly,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.13-rc1 next-20170717]
[cannot apply to tip/x86/core]
[if your patch is applied to the wrong git tree, please drop us a note to help 
improve the system]

config: x86_64-rhel (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the 
 HEAD ac9354b5afdbfbc99257e73a7b3af517ea8ebb91 builds fine.
      It only hurts bisectibility.

All errors (new ones prefixed by >>):

   In file included from arch/x86/hyperv/hv_init.c:23:0:
   arch/x86/include/asm/mshyperv.h: In function 'hv_do_hypercall':
>> arch/x86/include/asm/mshyperv.h:177:30: error: implicit declaration of 
>> function 'virt_to_phys' [-Werror=implicit-function-declaration]
     u64 input_address = input ? virt_to_phys(input) : 0;
   In file included from arch/x86/include/asm/realmode.h:5:0,
                    from arch/x86/include/asm/acpi.h:33,
                    from arch/x86/include/asm/fixmap.h:19,
                    from arch/x86/include/asm/apic.h:10,
                    from arch/x86/include/asm/smp.h:12,
                    from arch/x86/include/asm/mmzone_64.h:10,
                    from arch/x86/include/asm/mmzone.h:4,
                    from include/linux/mmzone.h:912,
                    from include/linux/gfp.h:5,
                    from include/linux/mm.h:9,
                    from arch/x86/hyperv/hv_init.c:26:
   arch/x86/include/asm/io.h: At top level:
>> arch/x86/include/asm/io.h:118:27: error: conflicting types for 'virt_to_phys'
    static inline phys_addr_t virt_to_phys(volatile void *address)
   In file included from arch/x86/hyperv/hv_init.c:23:0:
   arch/x86/include/asm/mshyperv.h:177:30: note: previous implicit declaration 
of 'virt_to_phys' was here
     u64 input_address = input ? virt_to_phys(input) : 0;
   cc1: some warnings being treated as errors

vim +/virt_to_phys +177 arch/x86/include/asm/mshyperv.h

   175  static inline u64 hv_do_hypercall(u64 control, void *input, void 
   176  {
 > 177          u64 input_address = input ? virt_to_phys(input) : 0;
   178          u64 output_address = output ? virt_to_phys(output) : 0;
   179          u64 hv_status;
   180          register void *__sp asm(_ASM_SP);

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

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