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



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-h0-02170640 (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 error/warnings (new ones prefixed by >>):

>> arch/x86/mm/dump_pagetables.c:87:2: error: implicit declaration of function 
>> '__fix_to_virt' [-Werror=implicit-function-declaration]
     { MODULES_END,          "End Modules" },
     ^
   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:71:37: 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 +87 arch/x86/mm/dump_pagetables.c

926e5392b Arjan van de Ven 2008-04-17   9   * This program is free software; 
you can redistribute it and/or
926e5392b Arjan van de Ven 2008-04-17  10   * modify it under the terms of the 
GNU General Public License
926e5392b Arjan van de Ven 2008-04-17  11   * as published by the Free Software 
Foundation; version 2
926e5392b Arjan van de Ven 2008-04-17  12   * of the License.
926e5392b Arjan van de Ven 2008-04-17  13   */
926e5392b Arjan van de Ven 2008-04-17  14  
fe770bf03 H. Peter Anvin   2008-04-17 @15  #include <linux/debugfs.h>
fe770bf03 H. Peter Anvin   2008-04-17  16  #include <linux/mm.h>
84e629b66 Paul Gortmaker   2016-07-13  17  #include <linux/init.h>
146fbb766 Andrey Ryabinin  2017-02-10  18  #include <linux/sched.h>
926e5392b Arjan van de Ven 2008-04-17  19  #include <linux/seq_file.h>
926e5392b Arjan van de Ven 2008-04-17  20  
926e5392b Arjan van de Ven 2008-04-17  21  #include <asm/pgtable.h>
926e5392b Arjan van de Ven 2008-04-17  22  
926e5392b Arjan van de Ven 2008-04-17  23  /*
926e5392b Arjan van de Ven 2008-04-17  24   * The dumper groups pagetable 
entries of the same type into one, and for
926e5392b Arjan van de Ven 2008-04-17  25   * that it needs to keep some state 
when walking, and flush this state
926e5392b Arjan van de Ven 2008-04-17  26   * when a "break" in the continuity 
is found.
926e5392b Arjan van de Ven 2008-04-17  27   */
926e5392b Arjan van de Ven 2008-04-17  28  struct pg_state {
926e5392b Arjan van de Ven 2008-04-17  29       int level;
926e5392b Arjan van de Ven 2008-04-17  30       pgprot_t current_prot;
926e5392b Arjan van de Ven 2008-04-17  31       unsigned long start_address;
926e5392b Arjan van de Ven 2008-04-17  32       unsigned long current_address;
fe770bf03 H. Peter Anvin   2008-04-17  33       const struct addr_marker 
*marker;
3891a04aa H. Peter Anvin   2014-04-29  34       unsigned long lines;
ef6bea6dd Borislav Petkov  2014-01-18  35       bool to_dmesg;
e1a58320a Stephen Smalley  2015-10-05  36       bool check_wx;
e1a58320a Stephen Smalley  2015-10-05  37       unsigned long wx_pages;
926e5392b Arjan van de Ven 2008-04-17  38  };
926e5392b Arjan van de Ven 2008-04-17  39  
fe770bf03 H. Peter Anvin   2008-04-17  40  struct addr_marker {
fe770bf03 H. Peter Anvin   2008-04-17  41       unsigned long start_address;
fe770bf03 H. Peter Anvin   2008-04-17  42       const char *name;
3891a04aa H. Peter Anvin   2014-04-29  43       unsigned long max_lines;
fe770bf03 H. Peter Anvin   2008-04-17  44  };
926e5392b Arjan van de Ven 2008-04-17  45  
92851e2fc Andres Salomon   2010-07-20  46  /* indices for address_markers; keep 
sync'd w/ address_markers below */
92851e2fc Andres Salomon   2010-07-20  47  enum address_markers_idx {
92851e2fc Andres Salomon   2010-07-20  48       USER_SPACE_NR = 0,
92851e2fc Andres Salomon   2010-07-20  49  #ifdef CONFIG_X86_64
92851e2fc Andres Salomon   2010-07-20  50       KERNEL_SPACE_NR,
92851e2fc Andres Salomon   2010-07-20  51       LOW_KERNEL_NR,
92851e2fc Andres Salomon   2010-07-20  52       VMALLOC_START_NR,
92851e2fc Andres Salomon   2010-07-20  53       VMEMMAP_START_NR,
8a5a5d153 Mathias Krause   2014-09-07  54  # ifdef CONFIG_X86_ESPFIX64
3891a04aa H. Peter Anvin   2014-04-29  55       ESPFIX_START_NR,
8a5a5d153 Mathias Krause   2014-09-07  56  # endif
92851e2fc Andres Salomon   2010-07-20  57       HIGH_KERNEL_NR,
92851e2fc Andres Salomon   2010-07-20  58       MODULES_VADDR_NR,
92851e2fc Andres Salomon   2010-07-20  59       MODULES_END_NR,
92851e2fc Andres Salomon   2010-07-20  60  #else
92851e2fc Andres Salomon   2010-07-20  61       KERNEL_SPACE_NR,
92851e2fc Andres Salomon   2010-07-20  62       VMALLOC_START_NR,
92851e2fc Andres Salomon   2010-07-20  63       VMALLOC_END_NR,
92851e2fc Andres Salomon   2010-07-20  64  # ifdef CONFIG_HIGHMEM
92851e2fc Andres Salomon   2010-07-20  65       PKMAP_BASE_NR,
92851e2fc Andres Salomon   2010-07-20  66  # endif
92851e2fc Andres Salomon   2010-07-20  67       FIXADDR_START_NR,
92851e2fc Andres Salomon   2010-07-20  68  #endif
92851e2fc Andres Salomon   2010-07-20  69  };
92851e2fc Andres Salomon   2010-07-20  70  
fe770bf03 H. Peter Anvin   2008-04-17  71  /* Address space markers hints */
fe770bf03 H. Peter Anvin   2008-04-17  72  static struct addr_marker 
address_markers[] = {
fe770bf03 H. Peter Anvin   2008-04-17  73       { 0, "User Space" },
fe770bf03 H. Peter Anvin   2008-04-17  74  #ifdef CONFIG_X86_64
fe770bf03 H. Peter Anvin   2008-04-17  75       { 0x8000000000000000UL, "Kernel 
Space" },
0483e1fa6 Thomas Garnier   2016-06-21  76       { 0/* PAGE_OFFSET */,   "Low 
Kernel Mapping" },
0483e1fa6 Thomas Garnier   2016-06-21  77       { 0/* VMALLOC_START */, 
"vmalloc() Area" },
0483e1fa6 Thomas Garnier   2016-06-21  78       { 0/* VMEMMAP_START */, 
"Vmemmap" },
8a5a5d153 Mathias Krause   2014-09-07  79  # ifdef CONFIG_X86_ESPFIX64
3891a04aa H. Peter Anvin   2014-04-29  80       { ESPFIX_BASE_ADDR,     "ESPfix 
Area", 16 },
8a5a5d153 Mathias Krause   2014-09-07  81  # endif
8266e31ed Mathias Krause   2014-09-21  82  # ifdef CONFIG_EFI
8266e31ed Mathias Krause   2014-09-21  83       { EFI_VA_END,           "EFI 
Runtime Services" },
8266e31ed Mathias Krause   2014-09-21  84  # endif
fe770bf03 H. Peter Anvin   2008-04-17  85       { __START_KERNEL_map,   "High 
Kernel Mapping" },
9a79cf9c1 Yinghai Lu       2008-03-07  86       { MODULES_VADDR,        
"Modules" },
9a79cf9c1 Yinghai Lu       2008-03-07 @87       { MODULES_END,          "End 
Modules" },
fe770bf03 H. Peter Anvin   2008-04-17  88  #else
fe770bf03 H. Peter Anvin   2008-04-17  89       { PAGE_OFFSET,          "Kernel 
Mapping" },
fe770bf03 H. Peter Anvin   2008-04-17  90       { 0/* VMALLOC_START */, 
"vmalloc() Area" },

:::::: The code at line 87 was first introduced by commit
:::::: 9a79cf9c1aa671325fa5ba37576c2cee23823d04 x86: sort address_markers for 
dump_pagetables

:::::: TO: Yinghai Lu <yhlu.kernel@xxxxxxxxx>
:::::: CC: Ingo Molnar <mingo@xxxxxxx>

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

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