Re: [PATCH v5 24/33] m68k: Convert various functions to use ptdescs

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

Hi Vishal,

kernel test robot noticed the following build errors:

[auto build test ERROR on next-20230622]
[cannot apply to akpm-mm/mm-everything powerpc/next powerpc/fixes s390/features geert-m68k/for-next geert-m68k/for-linus linus/master v6.4-rc7 v6.4-rc6 v6.4-rc5 v6.4-rc7]
[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/Vishal-Moola-Oracle/mm-Add-PAGE_TYPE_OP-folio-functions/20230623-050011
base:   next-20230622
patch link:    https://lore.kernel.org/r/20230622205745.79707-25-vishal.moola%40gmail.com
patch subject: [PATCH v5 24/33] m68k: Convert various functions to use ptdescs
config: m68k-randconfig-s051-20230625 (https://download.01.org/0day-ci/archive/20230625/202306251513.WVzxgGxu-lkp@intel.com/config)
compiler: m68k-linux-gcc (GCC) 12.3.0
reproduce: (https://download.01.org/0day-ci/archive/20230625/202306251513.WVzxgGxu-lkp@intel.com/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@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202306251513.WVzxgGxu-lkp@intel.com/

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

   In file included from arch/m68k/include/asm/pgalloc.h:12,
                    from kernel/fork.c:103:
   arch/m68k/include/asm/mcf_pgalloc.h: In function 'pgd_alloc':
>> arch/m68k/include/asm/mcf_pgalloc.h:82:60: error: 'GFP_NOWARN' undeclared (first use in this function); did you mean 'GFP_NOWAIT'?
      82 |         struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | GFP_NOWARN) &
         |                                                            ^~~~~~~~~~
         |                                                            GFP_NOWAIT
   arch/m68k/include/asm/mcf_pgalloc.h:82:60: note: each undeclared identifier is reported only once for each function it appears in
   arch/m68k/include/asm/mcf_pgalloc.h: At top level:
>> arch/m68k/include/asm/mcf_pgalloc.h:23:16: warning: 'ptdesc_address' is static but used in inline function 'pte_alloc_one_kernel' which is not static
      23 |         return ptdesc_address(ptdesc);
         |                ^~~~~~~~~~~~~~
>> arch/m68k/include/asm/mcf_pgalloc.h:17:33: warning: 'pagetable_alloc' is static but used in inline function 'pte_alloc_one_kernel' which is not static
      17 |         struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | __GFP_ZERO) &
         |                                 ^~~~~~~~~~~~~~~
>> arch/m68k/include/asm/mcf_pgalloc.h:10:24: warning: 'virt_to_ptdesc' is static but used in inline function 'pte_free_kernel' which is not static
      10 |         pagetable_free(virt_to_ptdesc(pte));
         |                        ^~~~~~~~~~~~~~
>> arch/m68k/include/asm/mcf_pgalloc.h:10:9: warning: 'pagetable_free' is static but used in inline function 'pte_free_kernel' which is not static
      10 |         pagetable_free(virt_to_ptdesc(pte));
         |         ^~~~~~~~~~~~~~
--
   In file included from arch/m68k/mm/mcfmmu.c:21:
   arch/m68k/include/asm/mcf_pgalloc.h: In function 'pgd_alloc':
>> arch/m68k/include/asm/mcf_pgalloc.h:82:60: error: 'GFP_NOWARN' undeclared (first use in this function); did you mean 'GFP_NOWAIT'?
      82 |         struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | GFP_NOWARN) &
         |                                                            ^~~~~~~~~~
         |                                                            GFP_NOWAIT
   arch/m68k/include/asm/mcf_pgalloc.h:82:60: note: each undeclared identifier is reported only once for each function it appears in
   arch/m68k/mm/mcfmmu.c: At top level:
   arch/m68k/mm/mcfmmu.c:36:13: warning: no previous prototype for 'paging_init' [-Wmissing-prototypes]
      36 | void __init paging_init(void)
         |             ^~~~~~~~~~~
   arch/m68k/mm/mcfmmu.c: In function 'paging_init':
   arch/m68k/mm/mcfmmu.c:41:37: warning: variable 'bootmem_end' set but not used [-Wunused-but-set-variable]
      41 |         unsigned long next_pgtable, bootmem_end;
         |                                     ^~~~~~~~~~~
   arch/m68k/include/asm/mcf_pgalloc.h: At top level:
>> arch/m68k/include/asm/mcf_pgalloc.h:23:16: warning: 'ptdesc_address' is static but used in inline function 'pte_alloc_one_kernel' which is not static
      23 |         return ptdesc_address(ptdesc);
         |                ^~~~~~~~~~~~~~
>> arch/m68k/include/asm/mcf_pgalloc.h:17:33: warning: 'pagetable_alloc' is static but used in inline function 'pte_alloc_one_kernel' which is not static
      17 |         struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | __GFP_ZERO) &
         |                                 ^~~~~~~~~~~~~~~
>> arch/m68k/include/asm/mcf_pgalloc.h:10:24: warning: 'virt_to_ptdesc' is static but used in inline function 'pte_free_kernel' which is not static
      10 |         pagetable_free(virt_to_ptdesc(pte));
         |                        ^~~~~~~~~~~~~~
>> arch/m68k/include/asm/mcf_pgalloc.h:10:9: warning: 'pagetable_free' is static but used in inline function 'pte_free_kernel' which is not static
      10 |         pagetable_free(virt_to_ptdesc(pte));
         |         ^~~~~~~~~~~~~~


vim +82 arch/m68k/include/asm/mcf_pgalloc.h

     7	
     8	extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
     9	{
  > 10		pagetable_free(virt_to_ptdesc(pte));
    11	}
    12	
    13	extern const char bad_pmd_string[];
    14	
    15	extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
    16	{
  > 17		struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | __GFP_ZERO) &
    18				~__GFP_HIGHMEM, 0);
    19	
    20		if (!ptdesc)
    21			return NULL;
    22	
  > 23		return ptdesc_address(ptdesc);
    24	}
    25	
    26	extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
    27	{
    28		return (pmd_t *) pgd;
    29	}
    30	
    31	#define pmd_populate(mm, pmd, pte) (pmd_val(*pmd) = (unsigned long)(pte))
    32	
    33	#define pmd_populate_kernel pmd_populate
    34	
    35	static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pgtable,
    36					  unsigned long address)
    37	{
    38		struct ptdesc *ptdesc = virt_to_ptdesc(pgtable);
    39	
    40		pagetable_pte_dtor(ptdesc);
    41		pagetable_free(ptdesc);
    42	}
    43	
    44	static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
    45	{
    46		struct ptdesc *ptdesc = pagetable_alloc(GFP_DMA | __GFP_ZERO, 0);
    47		pte_t *pte;
    48	
    49		if (!ptdesc)
    50			return NULL;
    51		if (!pagetable_pte_ctor(ptdesc)) {
    52			pagetable_free(ptdesc);
    53			return NULL;
    54		}
    55	
    56		pte = ptdesc_address(ptdesc);
    57		return pte;
    58	}
    59	
    60	static inline void pte_free(struct mm_struct *mm, pgtable_t pgtable)
    61	{
    62		struct ptdesc *ptdesc = virt_to_ptdesc(pgtable);
    63	
    64		pagetable_pte_dtor(ptdesc);
    65		pagetable_free(ptdesc);
    66	}
    67	
    68	/*
    69	 * In our implementation, each pgd entry contains 1 pmd that is never allocated
    70	 * or freed.  pgd_present is always 1, so this should never be called. -NL
    71	 */
    72	#define pmd_free(mm, pmd) BUG()
    73	
    74	static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
    75	{
    76		pagetable_free(virt_to_ptdesc(pgd));
    77	}
    78	
    79	static inline pgd_t *pgd_alloc(struct mm_struct *mm)
    80	{
    81		pgd_t *new_pgd;
  > 82		struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | GFP_NOWARN) &
    83				~__GFP_HIGHMEM, 0);
    84	
    85		if (!ptdesc)
    86			return NULL;
    87		new_pgd = ptdesc_address(ptdesc);
    88	
    89		memcpy(new_pgd, swapper_pg_dir, PTRS_PER_PGD * sizeof(pgd_t));
    90		memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
    91		return new_pgd;
    92	}
    93	

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