Re: [PATCH v4 1/4] x86/mm: Adapt MODULES_END based on Fixmap section size

[kbuild test robot <lkp@intel.com>]

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Hi Thomas,

[auto build test ERROR on next-20170216]
[also build test ERROR on v4.10-rc8]
[cannot apply to tip/x86/core kvm/linux-next tip/auto-latest v4.9-rc8 v4.9-rc7 v4.9-rc6]
[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/Thomas-Garnier/x86-mm-Adapt-MODULES_END-based-on-Fixmap-section-size/20170217-072759
config: x86_64-randconfig-s4-02170325 (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 

All errors (new ones prefixed by >>):

   In file included from arch/x86/include/asm/pgtable_types.h:240:0,
                    from arch/x86/include/asm/paravirt_types.h:44,
                    from arch/x86/include/asm/ptrace.h:71,
                    from arch/x86/include/asm/math_emu.h:4,
                    from arch/x86/include/asm/processor.h:11,
                    from arch/x86/include/asm/cpufeature.h:4,
                    from arch/x86/include/asm/thread_info.h:52,
                    from include/linux/thread_info.h:25,
                    from arch/x86/include/asm/preempt.h:6,
                    from include/linux/preempt.h:59,
                    from include/linux/spinlock.h:50,
                    from include/linux/wait.h:8,
                    from include/linux/fs.h:5,
                    from include/linux/debugfs.h:18,
                    from arch/x86/mm/dump_pagetables.c:15:
>> arch/x86/include/asm/pgtable_64_types.h:71:23: error: implicit declaration of function '__fix_to_virt' [-Werror=implicit-function-declaration]
    #define MODULES_END   __fix_to_virt(__end_of_fixed_addresses + 1)
                          ^
   arch/x86/mm/dump_pagetables.c:87:4: note: in expansion of macro 'MODULES_END'
     { MODULES_END,          "End Modules" },
       ^~~~~~~~~~~
   arch/x86/include/asm/pgtable_64_types.h:71:37: error: '__end_of_fixed_addresses' undeclared here (not in a function)
    #define MODULES_END   __fix_to_virt(__end_of_fixed_addresses + 1)
                                        ^
   arch/x86/mm/dump_pagetables.c:87:4: note: in expansion of macro 'MODULES_END'
     { MODULES_END,          "End Modules" },
       ^~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/__fix_to_virt +71 arch/x86/include/asm/pgtable_64_types.h

    65	#define VMALLOC_START	__VMALLOC_BASE
    66	#define VMEMMAP_START	__VMEMMAP_BASE
    67	#endif /* CONFIG_RANDOMIZE_MEMORY */
    68	#define VMALLOC_END	(VMALLOC_START + _AC((VMALLOC_SIZE_TB << 40) - 1, UL))
    69	#define MODULES_VADDR    (__START_KERNEL_map + KERNEL_IMAGE_SIZE)
    70	/* The module sections ends with the start of the fixmap */
  > 71	#define MODULES_END   __fix_to_virt(__end_of_fixed_addresses + 1)
    72	#define MODULES_LEN   (MODULES_END - MODULES_VADDR)
    73	#define ESPFIX_PGD_ENTRY _AC(-2, UL)
    74	#define ESPFIX_BASE_ADDR (ESPFIX_PGD_ENTRY << PGDIR_SHIFT)

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