linux-kernel - Re: [Xen-devel] [PATCH v2 14/21] x86/xen: split suspend.c for PV and PVHVM guests

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Date:   Sun, 5 Mar 2017 17:13:51 +0800
From:   kbuild test robot <lkp@...el.com>
To:     Vitaly Kuznetsov <vkuznets@...hat.com>
Cc:     kbuild-all@...org, xen-devel@...ts.xenproject.org,
        Juergen Gross <jgross@...e.com>,
        Boris Ostrovsky <boris.ostrovsky@...cle.com>, x86@...nel.org,
        Andrew Jones <drjones@...hat.com>, linux-kernel@...r.kernel.org
Subject: Re: [Xen-devel] [PATCH v2 14/21] x86/xen: split suspend.c for PV and
 PVHVM guests

Hi Vitaly,

[auto build test ERROR on xen-tip/linux-next]
[also build test ERROR on next-20170303]
[cannot apply to v4.10]
[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/x86-xen-untangle-PV-and-PVHVM-guest-support-code/20170305-162950
base:   https://git.kernel.org/pub/scm/linux/kernel/git/xen/tip.git linux-next
config: x86_64-randconfig-i0-03021655 (attached as .config)
compiler: gcc-4.9 (Debian 4.9.4-2) 4.9.4
reproduce:
        # save the attached .config to linux build tree
        make ARCH=x86_64 

All errors (new ones prefixed by >>):

   arch/x86/xen/suspend_pv.c: In function 'xen_pv_pre_suspend':
>> arch/x86/xen/suspend_pv.c:19:2: error: implicit declaration of function 'fix_to_virt' [-Werror=implicit-function-declaration]
     if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
     ^
   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 arch/x86/xen/suspend_pv.c:1:
>> arch/x86/xen/suspend_pv.c:19:47: error: 'FIX_PARAVIRT_BOOTMAP' undeclared (first use in this function)
     if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
                                                  ^
   include/linux/compiler.h:149:30: note: in definition of macro '__trace_if'
     if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
                                 ^
   arch/x86/xen/suspend_pv.c:19:2: note: in expansion of macro 'if'
     if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
     ^
   arch/x86/xen/suspend_pv.c:19:47: note: each undeclared identifier is reported only once for each function it appears in
     if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
                                                  ^
   include/linux/compiler.h:149:30: note: in definition of macro '__trace_if'
     if (__builtin_constant_p(!!(cond)) ? !!(cond) :   \
                                 ^
   arch/x86/xen/suspend_pv.c:19:2: note: in expansion of macro 'if'
     if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
     ^
   cc1: some warnings being treated as errors

vim +/fix_to_virt +19 arch/x86/xen/suspend_pv.c

    13		xen_start_info->console.domU.mfn =
    14			mfn_to_pfn(xen_start_info->console.domU.mfn);
    15	
    16		BUG_ON(!irqs_disabled());
    17	
    18		HYPERVISOR_shared_info = &xen_dummy_shared_info;
  > 19		if (HYPERVISOR_update_va_mapping(fix_to_virt(FIX_PARAVIRT_BOOTMAP),
    20						 __pte_ma(0), 0))
    21			BUG();
    22	}

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