Re: [PATCH 2/5] x86: Remove custom definition of mk_pte()

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Hi Matthew,

kernel test robot noticed the following build errors:

[auto build test ERROR on geert-m68k/for-next]
[also build test ERROR on geert-m68k/for-linus uml/next linus/master v6.11-rc3 next-20240814]
[cannot apply to uml/fixes]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch#_base_tree_information]

url:    https://github.com/intel-lab-lkp/linux/commits/Matthew-Wilcox-Oracle/mm-Introduce-a-common-definition-of-mk_pte/20240815-001852
base:   https://git.kernel.org/pub/scm/linux/kernel/git/geert/linux-m68k.git for-next
patch link:    https://lore.kernel.org/r/20240814154427.162475-3-willy%40infradead.org
patch subject: [PATCH 2/5] x86: Remove custom definition of mk_pte()
config: x86_64-buildonly-randconfig-003-20240815 (https://download.01.org/0day-ci/archive/20240815/202408151133.BaOdxDkR-lkp@xxxxxxxxx/config)
compiler: clang version 18.1.5 (https://github.com/llvm/llvm-project 617a15a9eac96088ae5e9134248d8236e34b91b1)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240815/202408151133.BaOdxDkR-lkp@xxxxxxxxx/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@xxxxxxxxx>
| Closes: https://lore.kernel.org/oe-kbuild-all/202408151133.BaOdxDkR-lkp@xxxxxxxxx/

All errors (new ones prefixed by >>):

   In file included from arch/x86/kernel/asm-offsets.c:14:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:21:
   In file included from include/linux/mm.h:30:
>> include/linux/pgtable.h:47:17: error: call to undeclared function 'page_to_section'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
      47 |         return pfn_pte(page_to_pfn(page), pgprot);
         |                        ^
   include/asm-generic/memory_model.h:64:21: note: expanded from macro 'page_to_pfn'
      64 | #define page_to_pfn __page_to_pfn
         |                     ^
   include/asm-generic/memory_model.h:47:14: note: expanded from macro '__page_to_pfn'
      47 |         int __sec = page_to_section(__pg);                      \
         |                     ^
   include/linux/pgtable.h:47:17: note: did you mean '__nr_to_section'?
   include/asm-generic/memory_model.h:64:21: note: expanded from macro 'page_to_pfn'
      64 | #define page_to_pfn __page_to_pfn
         |                     ^
   include/asm-generic/memory_model.h:47:14: note: expanded from macro '__page_to_pfn'
      47 |         int __sec = page_to_section(__pg);                      \
         |                     ^
   include/linux/mmzone.h:1853:35: note: '__nr_to_section' declared here
    1853 | static inline struct mem_section *__nr_to_section(unsigned long nr)
         |                                   ^
   In file included from arch/x86/kernel/asm-offsets.c:14:
   In file included from include/linux/suspend.h:5:
   In file included from include/linux/swap.h:9:
   In file included from include/linux/memcontrol.h:21:
>> include/linux/mm.h:1904:29: error: static declaration of 'page_to_section' follows non-static declaration
    1904 | static inline unsigned long page_to_section(const struct page *page)
         |                             ^
   include/linux/pgtable.h:47:17: note: previous implicit declaration is here
      47 |         return pfn_pte(page_to_pfn(page), pgprot);
         |                        ^
   include/asm-generic/memory_model.h:64:21: note: expanded from macro 'page_to_pfn'
      64 | #define page_to_pfn __page_to_pfn
         |                     ^
   include/asm-generic/memory_model.h:47:14: note: expanded from macro '__page_to_pfn'
      47 |         int __sec = page_to_section(__pg);                      \
         |                     ^
   2 errors generated.
   make[3]: *** [scripts/Makefile.build:117: arch/x86/kernel/asm-offsets.s] Error 1 shuffle=262036656
   make[3]: Target 'prepare' not remade because of errors.
   make[2]: *** [Makefile:1208: prepare0] Error 2 shuffle=262036656
   make[2]: Target 'prepare' not remade because of errors.
   make[1]: *** [Makefile:240: __sub-make] Error 2 shuffle=262036656
   make[1]: Target 'prepare' not remade because of errors.
   make: *** [Makefile:240: __sub-make] Error 2 shuffle=262036656
   make: Target 'prepare' not remade because of errors.


vim +/page_to_section +47 include/linux/pgtable.h

1c2f7d14d84f767 Anshuman Khandual       2021-06-30  43  
9353c36cfa235ae Matthew Wilcox (Oracle  2024-08-14  44) #ifndef mk_pte
9353c36cfa235ae Matthew Wilcox (Oracle  2024-08-14  45) static inline pte_t mk_pte(struct page *page, pgprot_t pgprot)
9353c36cfa235ae Matthew Wilcox (Oracle  2024-08-14  46) {
9353c36cfa235ae Matthew Wilcox (Oracle  2024-08-14 @47) 	return pfn_pte(page_to_pfn(page), pgprot);
9353c36cfa235ae Matthew Wilcox (Oracle  2024-08-14  48) }
9353c36cfa235ae Matthew Wilcox (Oracle  2024-08-14  49) #endif
9353c36cfa235ae Matthew Wilcox (Oracle  2024-08-14  50) 

-- 
0-DAY CI Kernel Test Service
https://github.com/intel/lkp-tests/wiki




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