Re: [PATCH] mm, vmalloc: properly track vmalloc users

[kbuild test robot]

Hi Michal,

[auto build test ERROR on mmotm/master]
[also build test ERROR on next-20170502]
[cannot apply to v4.11]
[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/Michal-Hocko/mm-vmalloc-properly-track-vmalloc-users/20170503-065022
base:   git://git.cmpxchg.org/linux-mmotm.git master
config: m68k-m5475evb_defconfig (attached as .config)
compiler: m68k-linux-gcc (GCC) 4.9.0
reproduce:
        wget https://raw.githubusercontent.com/01org/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # save the attached .config to linux build tree
        make.cross ARCH=m68k 

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

   In file included from arch/m68k/include/asm/pgtable_mm.h:145:0,
                    from arch/m68k/include/asm/pgtable.h:4,
                    from include/linux/vmalloc.h:9,
                    from arch/m68k/kernel/module.c:9:
   arch/m68k/include/asm/mcf_pgtable.h: In function 'nocache_page':
>> arch/m68k/include/asm/mcf_pgtable.h:339:43: error: 'init_mm' undeclared (first use in this function)
    #define pgd_offset_k(address) pgd_offset(&init_mm, address)
                                              ^
   arch/m68k/include/asm/mcf_pgtable.h:334:35: note: in definition of macro 'pgd_offset'
    #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
                                      ^
>> arch/m68k/include/asm/mcf_pgtable.h:366:8: note: in expansion of macro 'pgd_offset_k'
     dir = pgd_offset_k(addr);
           ^
   arch/m68k/include/asm/mcf_pgtable.h:339:43: note: each undeclared identifier is reported only once for each function it appears in
    #define pgd_offset_k(address) pgd_offset(&init_mm, address)
                                              ^
   arch/m68k/include/asm/mcf_pgtable.h:334:35: note: in definition of macro 'pgd_offset'
    #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
                                      ^
>> arch/m68k/include/asm/mcf_pgtable.h:366:8: note: in expansion of macro 'pgd_offset_k'
     dir = pgd_offset_k(addr);
           ^
   arch/m68k/include/asm/mcf_pgtable.h: In function 'cache_page':
>> arch/m68k/include/asm/mcf_pgtable.h:339:43: error: 'init_mm' undeclared (first use in this function)
    #define pgd_offset_k(address) pgd_offset(&init_mm, address)
                                              ^
   arch/m68k/include/asm/mcf_pgtable.h:334:35: note: in definition of macro 'pgd_offset'
    #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address))
                                      ^
   arch/m68k/include/asm/mcf_pgtable.h:382:8: note: in expansion of macro 'pgd_offset_k'
     dir = pgd_offset_k(addr);
           ^

vim +/init_mm +339 arch/m68k/include/asm/mcf_pgtable.h

91521c2e Greg Ungerer 2011-10-14  333  #define pgd_index(address)	((address) >> PGDIR_SHIFT)
91521c2e Greg Ungerer 2011-10-14  334  #define pgd_offset(mm, address)	((mm)->pgd + pgd_index(address))
91521c2e Greg Ungerer 2011-10-14  335  
91521c2e Greg Ungerer 2011-10-14  336  /*
91521c2e Greg Ungerer 2011-10-14  337   * Find an entry in a kernel pagetable directory.
91521c2e Greg Ungerer 2011-10-14  338   */
91521c2e Greg Ungerer 2011-10-14 @339  #define pgd_offset_k(address)	pgd_offset(&init_mm, address)
91521c2e Greg Ungerer 2011-10-14  340  
91521c2e Greg Ungerer 2011-10-14  341  /*
91521c2e Greg Ungerer 2011-10-14  342   * Find an entry in the second-level pagetable.
91521c2e Greg Ungerer 2011-10-14  343   */
91521c2e Greg Ungerer 2011-10-14  344  static inline pmd_t *pmd_offset(pgd_t *pgd, unsigned long address)
91521c2e Greg Ungerer 2011-10-14  345  {
91521c2e Greg Ungerer 2011-10-14  346  	return (pmd_t *) pgd;
91521c2e Greg Ungerer 2011-10-14  347  }
91521c2e Greg Ungerer 2011-10-14  348  
91521c2e Greg Ungerer 2011-10-14  349  /*
91521c2e Greg Ungerer 2011-10-14  350   * Find an entry in the third-level pagetable.
91521c2e Greg Ungerer 2011-10-14  351   */
91521c2e Greg Ungerer 2011-10-14  352  #define __pte_offset(address)	((address >> PAGE_SHIFT) & (PTRS_PER_PTE - 1))
91521c2e Greg Ungerer 2011-10-14  353  #define pte_offset_kernel(dir, address) \
91521c2e Greg Ungerer 2011-10-14  354  	((pte_t *) __pmd_page(*(dir)) + __pte_offset(address))
91521c2e Greg Ungerer 2011-10-14  355  
91521c2e Greg Ungerer 2011-10-14  356  /*
91521c2e Greg Ungerer 2011-10-14  357   * Disable caching for page at given kernel virtual address.
91521c2e Greg Ungerer 2011-10-14  358   */
91521c2e Greg Ungerer 2011-10-14  359  static inline void nocache_page(void *vaddr)
91521c2e Greg Ungerer 2011-10-14  360  {
91521c2e Greg Ungerer 2011-10-14  361  	pgd_t *dir;
91521c2e Greg Ungerer 2011-10-14  362  	pmd_t *pmdp;
91521c2e Greg Ungerer 2011-10-14  363  	pte_t *ptep;
91521c2e Greg Ungerer 2011-10-14  364  	unsigned long addr = (unsigned long) vaddr;
91521c2e Greg Ungerer 2011-10-14  365  
91521c2e Greg Ungerer 2011-10-14 @366  	dir = pgd_offset_k(addr);
91521c2e Greg Ungerer 2011-10-14  367  	pmdp = pmd_offset(dir, addr);
91521c2e Greg Ungerer 2011-10-14  368  	ptep = pte_offset_kernel(pmdp, addr);
91521c2e Greg Ungerer 2011-10-14  369  	*ptep = pte_mknocache(*ptep);

:::::: The code at line 339 was first introduced by commit
:::::: 91521c2ea6e3d5a790df40988101ad099ddbf7c8 m68k: page table support definitions and code for ColdFire MMU

:::::: TO: Greg Ungerer <gerg@xxxxxxxxxxx>
:::::: CC: Greg Ungerer <gerg@xxxxxxxxxxx>

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