linux-kernel - Re: [PATCH v9 03/10] x86/hyper-v: make hv_do

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Date:   Mon, 17 Jul 2017 15:04:34 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:     kbuild-all@...org, devel@...uxdriverproject.org,
        Stephen Hemminger <sthemmin@...rosoft.com>,
        Jork Loeser <Jork.Loeser@...rosoft.com>,
        Haiyang Zhang <haiyangz@...rosoft.com>, x86@...nel.org,
        linux-kernel@...r.kernel.org, Steven Rostedt <rostedt@...dmis.org>,
        Andy Shevchenko <andy.shevchenko@...il.com>,
        Ingo Molnar <mingo@...hat.com>,
        Andy Lutomirski <luto@...nel.org>,
        "H. Peter Anvin" <hpa@...or.com>,
        Thomas Gleixner <tglx@...utronix.de>
Subject: Re: [PATCH v9 03/10] x86/hyper-v: make hv_do_hypercall() inline

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]

url:    https://github.com/0day-ci/linux/commits/Vitaly-Kuznetsov/Hyper-V-paravirtualized-remote-TLB-flushing-and-hypercall-improvements/20170715-023027
config: x86_64-rhel (attached as .config)
compiler: gcc-6 (Debian 6.2.0-3) 6.2.0 20160901
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

Note: the linux-review/Vitaly-Kuznetsov/Hyper-V-paravirtualized-remote-TLB-flushing-and-hypercall-improvements/20170715-023027 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

   174	
   175	static inline u64 hv_do_hypercall(u64 control, void *input, void *output)
   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);
   181	

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