Re: [PATCH 32/60] block: implement sp version of bvec iterator helpers

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Hi Ming,

[auto build test ERROR on linus/master]
[also build test ERROR on v4.9-rc2 next-20161028]
[if your patch is applied to the wrong git tree, please drop us a note to help improve the system]
[Suggest to use git(>=2.9.0) format-patch --base=<commit> (or --base=auto for convenience) to record what (public, well-known) commit your patch series was built on]
[Check https://git-scm.com/docs/git-format-patch for more information]

url:    https://github.com/0day-ci/linux/commits/Ming-Lei/block-support-multipage-bvec/20161029-163910
config: sparc-defconfig (attached as .config)
compiler: sparc-linux-gcc (GCC) 6.2.0
reproduce:
        wget https://git.kernel.org/cgit/linux/kernel/git/wfg/lkp-tests.git/plain/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=sparc 

All error/warnings (new ones prefixed by >>):

   In file included from arch/sparc/include/asm/oplib.h:6:0,
                    from arch/sparc/include/asm/pgtable_32.h:21,
                    from arch/sparc/include/asm/pgtable.h:6,
                    from include/linux/mm.h:68,
                    from include/linux/bvec.h:25,
                    from include/linux/blk_types.h:9,
                    from include/linux/fs.h:31,
                    from include/linux/proc_fs.h:8,
                    from arch/sparc/include/asm/prom.h:22,
                    from include/linux/of.h:232,
                    from arch/sparc/include/asm/openprom.h:14,
                    from arch/sparc/include/asm/device.h:9,
                    from include/linux/device.h:30,
                    from include/linux/node.h:17,
                    from include/linux/cpu.h:16,
                    from include/linux/stop_machine.h:4,
                    from kernel/sched/sched.h:10,
                    from kernel/sched/loadavg.c:11:
>> arch/sparc/include/asm/oplib_32.h:105:39: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
    int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
                                          ^~~~~~~~~~~~~~~~~~~~
   arch/sparc/include/asm/oplib_32.h:168:36: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
    void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
                                       ^~~~~~~~~~~~~~~~~~~~
   arch/sparc/include/asm/oplib_32.h:172:18: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
              struct linux_prom_registers *sbusregs, int nregs);
                     ^~~~~~~~~~~~~~~~~~~~
--
   In file included from arch/sparc/include/asm/oplib.h:6:0,
                    from arch/sparc/include/asm/pgtable_32.h:21,
                    from arch/sparc/include/asm/pgtable.h:6,
                    from include/linux/mm.h:68,
                    from include/linux/bvec.h:25,
                    from include/linux/blk_types.h:9,
                    from include/linux/fs.h:31,
                    from include/linux/proc_fs.h:8,
                    from arch/sparc/include/asm/prom.h:22,
                    from include/linux/of.h:232,
                    from arch/sparc/include/asm/openprom.h:14,
                    from arch/sparc/prom/mp.c:12:
>> arch/sparc/include/asm/oplib_32.h:105:39: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
    int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
                                          ^~~~~~~~~~~~~~~~~~~~
   arch/sparc/include/asm/oplib_32.h:168:36: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
    void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
                                       ^~~~~~~~~~~~~~~~~~~~
   arch/sparc/include/asm/oplib_32.h:172:18: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
              struct linux_prom_registers *sbusregs, int nregs);
                     ^~~~~~~~~~~~~~~~~~~~
>> arch/sparc/prom/mp.c:23:1: error: conflicting types for 'prom_startcpu'
    prom_startcpu(int cpunode, struct linux_prom_registers *ctable_reg, int ctx, char *pc)
    ^~~~~~~~~~~~~
   In file included from arch/sparc/include/asm/oplib.h:6:0,
                    from arch/sparc/include/asm/pgtable_32.h:21,
                    from arch/sparc/include/asm/pgtable.h:6,
                    from include/linux/mm.h:68,
                    from include/linux/bvec.h:25,
                    from include/linux/blk_types.h:9,
                    from include/linux/fs.h:31,
                    from include/linux/proc_fs.h:8,
                    from arch/sparc/include/asm/prom.h:22,
                    from include/linux/of.h:232,
                    from arch/sparc/include/asm/openprom.h:14,
                    from arch/sparc/prom/mp.c:12:
   arch/sparc/include/asm/oplib_32.h:105:5: note: previous declaration of 'prom_startcpu' was here
    int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
        ^~~~~~~~~~~~~
--
   In file included from arch/sparc/include/asm/oplib.h:6:0,
                    from arch/sparc/include/asm/pgtable_32.h:21,
                    from arch/sparc/include/asm/pgtable.h:6,
                    from include/linux/mm.h:68,
                    from include/linux/bvec.h:25,
                    from include/linux/blk_types.h:9,
                    from include/linux/fs.h:31,
                    from include/linux/proc_fs.h:8,
                    from arch/sparc/include/asm/prom.h:22,
                    from include/linux/of.h:232,
                    from arch/sparc/include/asm/openprom.h:14,
                    from arch/sparc/prom/ranges.c:11:
>> arch/sparc/include/asm/oplib_32.h:105:39: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
    int prom_startcpu(int cpunode, struct linux_prom_registers *context_table,
                                          ^~~~~~~~~~~~~~~~~~~~
   arch/sparc/include/asm/oplib_32.h:168:36: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
    void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
                                       ^~~~~~~~~~~~~~~~~~~~
   arch/sparc/include/asm/oplib_32.h:172:18: warning: 'struct linux_prom_registers' declared inside parameter list will not be visible outside of this definition or declaration
              struct linux_prom_registers *sbusregs, int nregs);
                     ^~~~~~~~~~~~~~~~~~~~
>> arch/sparc/prom/ranges.c:57:6: error: conflicting types for 'prom_apply_obio_ranges'
    void prom_apply_obio_ranges(struct linux_prom_registers *regs, int nregs)
         ^~~~~~~~~~~~~~~~~~~~~~
   In file included from arch/sparc/include/asm/oplib.h:6:0,
                    from arch/sparc/include/asm/pgtable_32.h:21,
                    from arch/sparc/include/asm/pgtable.h:6,
                    from include/linux/mm.h:68,
                    from include/linux/bvec.h:25,
                    from include/linux/blk_types.h:9,
                    from include/linux/fs.h:31,
                    from include/linux/proc_fs.h:8,
                    from arch/sparc/include/asm/prom.h:22,
                    from include/linux/of.h:232,
                    from arch/sparc/include/asm/openprom.h:14,
                    from arch/sparc/prom/ranges.c:11:
   arch/sparc/include/asm/oplib_32.h:168:6: note: previous declaration of 'prom_apply_obio_ranges' was here
    void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
         ^~~~~~~~~~~~~~~~~~~~~~
   In file included from include/linux/linkage.h:6:0,
                    from include/linux/kernel.h:6,
                    from include/linux/list.h:8,
                    from include/linux/module.h:9,
                    from arch/sparc/prom/ranges.c:9:
   arch/sparc/prom/ranges.c:62:15: error: conflicting types for 'prom_apply_obio_ranges'
    EXPORT_SYMBOL(prom_apply_obio_ranges);
                  ^
   include/linux/export.h:58:21: note: in definition of macro '___EXPORT_SYMBOL'
     extern typeof(sym) sym;      \
                        ^~~
>> arch/sparc/prom/ranges.c:62:1: note: in expansion of macro 'EXPORT_SYMBOL'
    EXPORT_SYMBOL(prom_apply_obio_ranges);
    ^~~~~~~~~~~~~
   In file included from arch/sparc/include/asm/oplib.h:6:0,
                    from arch/sparc/include/asm/pgtable_32.h:21,
                    from arch/sparc/include/asm/pgtable.h:6,
                    from include/linux/mm.h:68,
                    from include/linux/bvec.h:25,
                    from include/linux/blk_types.h:9,
                    from include/linux/fs.h:31,
                    from include/linux/proc_fs.h:8,
                    from arch/sparc/include/asm/prom.h:22,
                    from include/linux/of.h:232,
                    from arch/sparc/include/asm/openprom.h:14,
                    from arch/sparc/prom/ranges.c:11:
   arch/sparc/include/asm/oplib_32.h:168:6: note: previous declaration of 'prom_apply_obio_ranges' was here
    void prom_apply_obio_ranges(struct linux_prom_registers *obioregs, int nregs);
         ^~~~~~~~~~~~~~~~~~~~~~
>> arch/sparc/prom/ranges.c:87:6: error: conflicting types for 'prom_apply_generic_ranges'
    void prom_apply_generic_ranges(phandle node, phandle parent,
         ^~~~~~~~~~~~~~~~~~~~~~~~~
   In file included from arch/sparc/include/asm/oplib.h:6:0,
                    from arch/sparc/include/asm/pgtable_32.h:21,
                    from arch/sparc/include/asm/pgtable.h:6,
                    from include/linux/mm.h:68,
                    from include/linux/bvec.h:25,
                    from include/linux/blk_types.h:9,
                    from include/linux/fs.h:31,
                    from include/linux/proc_fs.h:8,
                    from arch/sparc/include/asm/prom.h:22,
                    from include/linux/of.h:232,
                    from arch/sparc/include/asm/openprom.h:14,
                    from arch/sparc/prom/ranges.c:11:
   arch/sparc/include/asm/oplib_32.h:171:6: note: previous declaration of 'prom_apply_generic_ranges' was here
    void prom_apply_generic_ranges(phandle node, phandle parent,
         ^~~~~~~~~~~~~~~~~~~~~~~~~
--
   In file included from include/linux/bvec.h:25:0,
                    from include/linux/blk_types.h:9,
                    from include/linux/fs.h:31,
                    from include/linux/proc_fs.h:8,
                    from arch/sparc/include/asm/prom.h:22,
                    from include/linux/of.h:232,
                    from arch/sparc/include/asm/openprom.h:14,
                    from arch/sparc/include/asm/oplib_32.h:11,
                    from arch/sparc/include/asm/oplib.h:6,
                    from arch/sparc/include/asm/pgtable_32.h:21,
                    from arch/sparc/include/asm/pgtable.h:6,
                    from mm/init-mm.c:9:
   include/linux/mm.h: In function 'is_vmalloc_addr':
>> include/linux/mm.h:486:17: error: 'VMALLOC_START' undeclared (first use in this function)
     return addr >= VMALLOC_START && addr < VMALLOC_END;
                    ^~~~~~~~~~~~~
   include/linux/mm.h:486:17: note: each undeclared identifier is reported only once for each function it appears in
>> include/linux/mm.h:486:41: error: 'VMALLOC_END' undeclared (first use in this function)
     return addr >= VMALLOC_START && addr < VMALLOC_END;
                                            ^~~~~~~~~~~
   include/linux/mm.h: In function 'maybe_mkwrite':
>> include/linux/mm.h:624:9: error: implicit declaration of function 'pte_mkwrite' [-Werror=implicit-function-declaration]
      pte = pte_mkwrite(pte);
            ^~~~~~~~~~~
   In file included from include/linux/bvec.h:25:0,
                    from include/linux/blk_types.h:9,
                    from include/linux/fs.h:31,
                    from include/linux/proc_fs.h:8,
                    from arch/sparc/include/asm/prom.h:22,
                    from include/linux/of.h:232,
                    from arch/sparc/include/asm/openprom.h:14,
                    from arch/sparc/include/asm/oplib_32.h:11,
                    from arch/sparc/include/asm/oplib.h:6,
                    from arch/sparc/include/asm/pgtable_32.h:21,
                    from arch/sparc/include/asm/pgtable.h:6,
                    from mm/init-mm.c:9:
   include/linux/mm.h: In function 'pgtable_init':
>> include/linux/mm.h:1674:2: error: implicit declaration of function 'pgtable_cache_init' [-Werror=implicit-function-declaration]
     pgtable_cache_init();
     ^~~~~~~~~~~~~~~~~~
   In file included from arch/sparc/include/asm/pgtable.h:6:0,
                    from mm/init-mm.c:9:
   arch/sparc/include/asm/pgtable_32.h: At top level:
>> arch/sparc/include/asm/pgtable_32.h:245:21: error: conflicting types for 'pte_mkwrite'
    static inline pte_t pte_mkwrite(pte_t pte)
                        ^~~~~~~~~~~
   In file included from include/linux/bvec.h:25:0,
                    from include/linux/blk_types.h:9,
                    from include/linux/fs.h:31,
                    from include/linux/proc_fs.h:8,
                    from arch/sparc/include/asm/prom.h:22,
                    from include/linux/of.h:232,
                    from arch/sparc/include/asm/openprom.h:14,
                    from arch/sparc/include/asm/oplib_32.h:11,
                    from arch/sparc/include/asm/oplib.h:6,
                    from arch/sparc/include/asm/pgtable_32.h:21,
                    from arch/sparc/include/asm/pgtable.h:6,
                    from mm/init-mm.c:9:
   include/linux/mm.h:624:9: note: previous implicit declaration of 'pte_mkwrite' was here
      pte = pte_mkwrite(pte);
            ^~~~~~~~~~~
   cc1: some warnings being treated as errors

vim +/VMALLOC_START +486 include/linux/mm.h

0738c4bb8 Paul Mundt             2008-03-12  480   */
bb00a789e Yaowei Bai             2016-05-19  481  static inline bool is_vmalloc_addr(const void *x)
9e2779fa2 Christoph Lameter      2008-02-04  482  {
0738c4bb8 Paul Mundt             2008-03-12  483  #ifdef CONFIG_MMU
9e2779fa2 Christoph Lameter      2008-02-04  484  	unsigned long addr = (unsigned long)x;
9e2779fa2 Christoph Lameter      2008-02-04  485  
9e2779fa2 Christoph Lameter      2008-02-04 @486  	return addr >= VMALLOC_START && addr < VMALLOC_END;
0738c4bb8 Paul Mundt             2008-03-12  487  #else
bb00a789e Yaowei Bai             2016-05-19  488  	return false;
8ca3ed87d David Howells          2008-02-23  489  #endif
0738c4bb8 Paul Mundt             2008-03-12  490  }
81ac3ad90 KAMEZAWA Hiroyuki      2009-09-22  491  #ifdef CONFIG_MMU
81ac3ad90 KAMEZAWA Hiroyuki      2009-09-22  492  extern int is_vmalloc_or_module_addr(const void *x);
81ac3ad90 KAMEZAWA Hiroyuki      2009-09-22  493  #else
934831d06 David Howells          2009-09-24  494  static inline int is_vmalloc_or_module_addr(const void *x)
81ac3ad90 KAMEZAWA Hiroyuki      2009-09-22  495  {
81ac3ad90 KAMEZAWA Hiroyuki      2009-09-22  496  	return 0;
81ac3ad90 KAMEZAWA Hiroyuki      2009-09-22  497  }
81ac3ad90 KAMEZAWA Hiroyuki      2009-09-22  498  #endif
9e2779fa2 Christoph Lameter      2008-02-04  499  
39f1f78d5 Al Viro                2014-05-06  500  extern void kvfree(const void *addr);
39f1f78d5 Al Viro                2014-05-06  501  
53f9263ba Kirill A. Shutemov     2016-01-15  502  static inline atomic_t *compound_mapcount_ptr(struct page *page)
53f9263ba Kirill A. Shutemov     2016-01-15  503  {
53f9263ba Kirill A. Shutemov     2016-01-15  504  	return &page[1].compound_mapcount;
53f9263ba Kirill A. Shutemov     2016-01-15  505  }
53f9263ba Kirill A. Shutemov     2016-01-15  506  
53f9263ba Kirill A. Shutemov     2016-01-15  507  static inline int compound_mapcount(struct page *page)
53f9263ba Kirill A. Shutemov     2016-01-15  508  {
5f527c2b3 Andrea Arcangeli       2016-05-20  509  	VM_BUG_ON_PAGE(!PageCompound(page), page);
53f9263ba Kirill A. Shutemov     2016-01-15  510  	page = compound_head(page);
53f9263ba Kirill A. Shutemov     2016-01-15  511  	return atomic_read(compound_mapcount_ptr(page)) + 1;
53f9263ba Kirill A. Shutemov     2016-01-15  512  }
53f9263ba Kirill A. Shutemov     2016-01-15  513  
ccaafd7fd Joonsoo Kim            2015-02-10  514  /*
70b50f94f Andrea Arcangeli       2011-11-02  515   * The atomic page->_mapcount, starts from -1: so that transitions
70b50f94f Andrea Arcangeli       2011-11-02  516   * both from it and to it can be tracked, using atomic_inc_and_test
70b50f94f Andrea Arcangeli       2011-11-02  517   * and atomic_add_negative(-1).
70b50f94f Andrea Arcangeli       2011-11-02  518   */
22b751c3d Mel Gorman             2013-02-22  519  static inline void page_mapcount_reset(struct page *page)
70b50f94f Andrea Arcangeli       2011-11-02  520  {
70b50f94f Andrea Arcangeli       2011-11-02  521  	atomic_set(&(page)->_mapcount, -1);
70b50f94f Andrea Arcangeli       2011-11-02  522  }
70b50f94f Andrea Arcangeli       2011-11-02  523  
b20ce5e03 Kirill A. Shutemov     2016-01-15  524  int __page_mapcount(struct page *page);
b20ce5e03 Kirill A. Shutemov     2016-01-15  525  
70b50f94f Andrea Arcangeli       2011-11-02  526  static inline int page_mapcount(struct page *page)
70b50f94f Andrea Arcangeli       2011-11-02  527  {
1d148e218 Wang, Yalin            2015-02-11  528  	VM_BUG_ON_PAGE(PageSlab(page), page);
53f9263ba Kirill A. Shutemov     2016-01-15  529  
b20ce5e03 Kirill A. Shutemov     2016-01-15  530  	if (unlikely(PageCompound(page)))
b20ce5e03 Kirill A. Shutemov     2016-01-15  531  		return __page_mapcount(page);
b20ce5e03 Kirill A. Shutemov     2016-01-15  532  	return atomic_read(&page->_mapcount) + 1;
53f9263ba Kirill A. Shutemov     2016-01-15  533  }
b20ce5e03 Kirill A. Shutemov     2016-01-15  534  
b20ce5e03 Kirill A. Shutemov     2016-01-15  535  #ifdef CONFIG_TRANSPARENT_HUGEPAGE
b20ce5e03 Kirill A. Shutemov     2016-01-15  536  int total_mapcount(struct page *page);
6d0a07edd Andrea Arcangeli       2016-05-12  537  int page_trans_huge_mapcount(struct page *page, int *total_mapcount);
b20ce5e03 Kirill A. Shutemov     2016-01-15  538  #else
b20ce5e03 Kirill A. Shutemov     2016-01-15  539  static inline int total_mapcount(struct page *page)
b20ce5e03 Kirill A. Shutemov     2016-01-15  540  {
b20ce5e03 Kirill A. Shutemov     2016-01-15  541  	return page_mapcount(page);
70b50f94f Andrea Arcangeli       2011-11-02  542  }
6d0a07edd Andrea Arcangeli       2016-05-12  543  static inline int page_trans_huge_mapcount(struct page *page,
6d0a07edd Andrea Arcangeli       2016-05-12  544  					   int *total_mapcount)
6d0a07edd Andrea Arcangeli       2016-05-12  545  {
6d0a07edd Andrea Arcangeli       2016-05-12  546  	int mapcount = page_mapcount(page);
6d0a07edd Andrea Arcangeli       2016-05-12  547  	if (total_mapcount)
6d0a07edd Andrea Arcangeli       2016-05-12  548  		*total_mapcount = mapcount;
6d0a07edd Andrea Arcangeli       2016-05-12  549  	return mapcount;
6d0a07edd Andrea Arcangeli       2016-05-12  550  }
b20ce5e03 Kirill A. Shutemov     2016-01-15  551  #endif
70b50f94f Andrea Arcangeli       2011-11-02  552  
b49af68ff Christoph Lameter      2007-05-06  553  static inline struct page *virt_to_head_page(const void *x)
b49af68ff Christoph Lameter      2007-05-06  554  {
b49af68ff Christoph Lameter      2007-05-06  555  	struct page *page = virt_to_page(x);
ccaafd7fd Joonsoo Kim            2015-02-10  556  
1d798ca3f Kirill A. Shutemov     2015-11-06  557  	return compound_head(page);
b49af68ff Christoph Lameter      2007-05-06  558  }
b49af68ff Christoph Lameter      2007-05-06  559  
ddc58f27f Kirill A. Shutemov     2016-01-15  560  void __put_page(struct page *page);
ddc58f27f Kirill A. Shutemov     2016-01-15  561  
1d7ea7324 Alexander Zarochentsev 2006-08-13  562  void put_pages_list(struct list_head *pages);
^1da177e4 Linus Torvalds         2005-04-16  563  
8dfcc9ba2 Nick Piggin            2006-03-22  564  void split_page(struct page *page, unsigned int order);
8dfcc9ba2 Nick Piggin            2006-03-22  565  
^1da177e4 Linus Torvalds         2005-04-16  566  /*
33f2ef89f Andy Whitcroft         2006-12-06  567   * Compound pages have a destructor function.  Provide a
33f2ef89f Andy Whitcroft         2006-12-06  568   * prototype for that function and accessor functions.
f1e61557f Kirill A. Shutemov     2015-11-06  569   * These are _only_ valid on the head of a compound page.
33f2ef89f Andy Whitcroft         2006-12-06  570   */
f1e61557f Kirill A. Shutemov     2015-11-06  571  typedef void compound_page_dtor(struct page *);
f1e61557f Kirill A. Shutemov     2015-11-06  572  
f1e61557f Kirill A. Shutemov     2015-11-06  573  /* Keep the enum in sync with compound_page_dtors array in mm/page_alloc.c */
f1e61557f Kirill A. Shutemov     2015-11-06  574  enum compound_dtor_id {
f1e61557f Kirill A. Shutemov     2015-11-06  575  	NULL_COMPOUND_DTOR,
f1e61557f Kirill A. Shutemov     2015-11-06  576  	COMPOUND_PAGE_DTOR,
f1e61557f Kirill A. Shutemov     2015-11-06  577  #ifdef CONFIG_HUGETLB_PAGE
f1e61557f Kirill A. Shutemov     2015-11-06  578  	HUGETLB_PAGE_DTOR,
f1e61557f Kirill A. Shutemov     2015-11-06  579  #endif
9a982250f Kirill A. Shutemov     2016-01-15  580  #ifdef CONFIG_TRANSPARENT_HUGEPAGE
9a982250f Kirill A. Shutemov     2016-01-15  581  	TRANSHUGE_PAGE_DTOR,
9a982250f Kirill A. Shutemov     2016-01-15  582  #endif
f1e61557f Kirill A. Shutemov     2015-11-06  583  	NR_COMPOUND_DTORS,
f1e61557f Kirill A. Shutemov     2015-11-06  584  };
f1e61557f Kirill A. Shutemov     2015-11-06  585  extern compound_page_dtor * const compound_page_dtors[];
33f2ef89f Andy Whitcroft         2006-12-06  586  
33f2ef89f Andy Whitcroft         2006-12-06  587  static inline void set_compound_page_dtor(struct page *page,
f1e61557f Kirill A. Shutemov     2015-11-06  588  		enum compound_dtor_id compound_dtor)
33f2ef89f Andy Whitcroft         2006-12-06  589  {
f1e61557f Kirill A. Shutemov     2015-11-06  590  	VM_BUG_ON_PAGE(compound_dtor >= NR_COMPOUND_DTORS, page);
f1e61557f Kirill A. Shutemov     2015-11-06  591  	page[1].compound_dtor = compound_dtor;
33f2ef89f Andy Whitcroft         2006-12-06  592  }
33f2ef89f Andy Whitcroft         2006-12-06  593  
33f2ef89f Andy Whitcroft         2006-12-06  594  static inline compound_page_dtor *get_compound_page_dtor(struct page *page)
33f2ef89f Andy Whitcroft         2006-12-06  595  {
f1e61557f Kirill A. Shutemov     2015-11-06  596  	VM_BUG_ON_PAGE(page[1].compound_dtor >= NR_COMPOUND_DTORS, page);
f1e61557f Kirill A. Shutemov     2015-11-06  597  	return compound_page_dtors[page[1].compound_dtor];
33f2ef89f Andy Whitcroft         2006-12-06  598  }
33f2ef89f Andy Whitcroft         2006-12-06  599  
d00181b96 Kirill A. Shutemov     2015-11-06  600  static inline unsigned int compound_order(struct page *page)
d85f33855 Christoph Lameter      2007-05-06  601  {
6d7779538 Christoph Lameter      2007-05-06  602  	if (!PageHead(page))
d85f33855 Christoph Lameter      2007-05-06  603  		return 0;
e4b294c2d Kirill A. Shutemov     2015-02-11  604  	return page[1].compound_order;
d85f33855 Christoph Lameter      2007-05-06  605  }
d85f33855 Christoph Lameter      2007-05-06  606  
f1e61557f Kirill A. Shutemov     2015-11-06  607  static inline void set_compound_order(struct page *page, unsigned int order)
d85f33855 Christoph Lameter      2007-05-06  608  {
e4b294c2d Kirill A. Shutemov     2015-02-11  609  	page[1].compound_order = order;
d85f33855 Christoph Lameter      2007-05-06  610  }
d85f33855 Christoph Lameter      2007-05-06  611  
9a982250f Kirill A. Shutemov     2016-01-15  612  void free_compound_page(struct page *page);
9a982250f Kirill A. Shutemov     2016-01-15  613  
3dece370e Michal Simek           2011-01-21  614  #ifdef CONFIG_MMU
33f2ef89f Andy Whitcroft         2006-12-06  615  /*
14fd403f2 Andrea Arcangeli       2011-01-13  616   * Do pte_mkwrite, but only if the vma says VM_WRITE.  We do this when
14fd403f2 Andrea Arcangeli       2011-01-13  617   * servicing faults for write access.  In the normal case, do always want
14fd403f2 Andrea Arcangeli       2011-01-13  618   * pte_mkwrite.  But get_user_pages can cause write faults for mappings
14fd403f2 Andrea Arcangeli       2011-01-13  619   * that do not have writing enabled, when used by access_process_vm.
14fd403f2 Andrea Arcangeli       2011-01-13  620   */
14fd403f2 Andrea Arcangeli       2011-01-13  621  static inline pte_t maybe_mkwrite(pte_t pte, struct vm_area_struct *vma)
14fd403f2 Andrea Arcangeli       2011-01-13  622  {
14fd403f2 Andrea Arcangeli       2011-01-13  623  	if (likely(vma->vm_flags & VM_WRITE))
14fd403f2 Andrea Arcangeli       2011-01-13 @624  		pte = pte_mkwrite(pte);
14fd403f2 Andrea Arcangeli       2011-01-13  625  	return pte;
14fd403f2 Andrea Arcangeli       2011-01-13  626  }
8c6e50b02 Kirill A. Shutemov     2014-04-07  627  

:::::: The code at line 486 was first introduced by commit
:::::: 9e2779fa281cfda13ac060753d674bbcaa23367e is_vmalloc_addr(): Check if an address is within the vmalloc boundaries

:::::: TO: Christoph Lameter <clameter@xxxxxxx>
:::::: CC: Linus Torvalds <torvalds@xxxxxxxxxxxxxxxxxxxxxxxxxx>

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

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