diff mbox series

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

Message ID 20230622205745.79707-25-vishal.moola@gmail.com
State New
Headers show
Series Split ptdesc from struct page | expand

Commit Message

Vishal Moola June 22, 2023, 8:57 p.m. UTC 
As part of the conversions to replace pgtable constructor/destructors with
ptdesc equivalents, convert various page table functions to use ptdescs.

Some of the functions use the *get*page*() helper functions. Convert
these to use pagetable_alloc() and ptdesc_address() instead to help
standardize page tables further.

Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>
Acked-by: Mike Rapoport (IBM) <rppt@kernel.org>
Acked-by: Geert Uytterhoeven <geert@linux-m68k.org>
---
 arch/m68k/include/asm/mcf_pgalloc.h  | 43 ++++++++++++++--------------
 arch/m68k/include/asm/sun3_pgalloc.h |  8 +++---
 arch/m68k/mm/motorola.c              |  4 +--
 3 files changed, 28 insertions(+), 27 deletions(-)

Comments

kernel test robot June 25, 2023, 7:57 a.m. UTC | #1 
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
Geert Uytterhoeven June 25, 2023, 8:51 a.m. UTC | #2 
Hi Vishal,

On Thu, Jun 22, 2023 at 10:58 PM Vishal Moola (Oracle)
<vishal.moola@gmail.com> wrote:
> As part of the conversions to replace pgtable constructor/destructors with
> ptdesc equivalents, convert various page table functions to use ptdescs.
>
> Some of the functions use the *get*page*() helper functions. Convert
> these to use pagetable_alloc() and ptdesc_address() instead to help
> standardize page tables further.
>
> Signed-off-by: Vishal Moola (Oracle) <vishal.moola@gmail.com>

Thanks for your patch!

> --- a/arch/m68k/include/asm/mcf_pgalloc.h
> +++ b/arch/m68k/include/asm/mcf_pgalloc.h

>  static inline pgd_t *pgd_alloc(struct mm_struct *mm)
>  {
>         pgd_t *new_pgd;
> +       struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | GFP_NOWARN) &

0-day already told you for v3 that GFP_NOWARN does not exist.
Please try cross-compiling your changes:
https://mirrors.edge.kernel.org/pub/tools/crosstool/

> +                       ~__GFP_HIGHMEM, 0);
>
> -       new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
> -       if (!new_pgd)
> +       if (!ptdesc)
>                 return NULL;
> +       new_pgd = ptdesc_address(ptdesc);
> +
>         memcpy(new_pgd, swapper_pg_dir, PTRS_PER_PGD * sizeof(pgd_t));
>         memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
>         return new_pgd;

Gr{oetje,eeting}s,

                        Geert
diff mbox series

Patch

diff --git a/arch/m68k/include/asm/mcf_pgalloc.h b/arch/m68k/include/asm/mcf_pgalloc.h
index 5c2c0a864524..790ade4e778e 100644
--- a/arch/m68k/include/asm/mcf_pgalloc.h
+++ b/arch/m68k/include/asm/mcf_pgalloc.h
@@ -7,20 +7,20 @@ 
 
 extern inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte)
 {
-	free_page((unsigned long) pte);
+	pagetable_free(virt_to_ptdesc(pte));
 }
 
 extern const char bad_pmd_string[];
 
 extern inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm)
 {
-	unsigned long page = __get_free_page(GFP_DMA);
+	struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | __GFP_ZERO) &
+			~__GFP_HIGHMEM, 0);
 
-	if (!page)
+	if (!ptdesc)
 		return NULL;
 
-	memset((void *)page, 0, PAGE_SIZE);
-	return (pte_t *) (page);
+	return ptdesc_address(ptdesc);
 }
 
 extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
@@ -35,36 +35,34 @@  extern inline pmd_t *pmd_alloc_kernel(pgd_t *pgd, unsigned long address)
 static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pgtable,
 				  unsigned long address)
 {
-	struct page *page = virt_to_page(pgtable);
+	struct ptdesc *ptdesc = virt_to_ptdesc(pgtable);
 
-	pgtable_pte_page_dtor(page);
-	__free_page(page);
+	pagetable_pte_dtor(ptdesc);
+	pagetable_free(ptdesc);
 }
 
 static inline pgtable_t pte_alloc_one(struct mm_struct *mm)
 {
-	struct page *page = alloc_pages(GFP_DMA, 0);
+	struct ptdesc *ptdesc = pagetable_alloc(GFP_DMA | __GFP_ZERO, 0);
 	pte_t *pte;
 
-	if (!page)
+	if (!ptdesc)
 		return NULL;
-	if (!pgtable_pte_page_ctor(page)) {
-		__free_page(page);
+	if (!pagetable_pte_ctor(ptdesc)) {
+		pagetable_free(ptdesc);
 		return NULL;
 	}
 
-	pte = page_address(page);
-	clear_page(pte);
-
+	pte = ptdesc_address(ptdesc);
 	return pte;
 }
 
 static inline void pte_free(struct mm_struct *mm, pgtable_t pgtable)
 {
-	struct page *page = virt_to_page(pgtable);
+	struct ptdesc *ptdesc = virt_to_ptdesc(pgtable);
 
-	pgtable_pte_page_dtor(page);
-	__free_page(page);
+	pagetable_pte_dtor(ptdesc);
+	pagetable_free(ptdesc);
 }
 
 /*
@@ -75,16 +73,19 @@  static inline void pte_free(struct mm_struct *mm, pgtable_t pgtable)
 
 static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd)
 {
-	free_page((unsigned long) pgd);
+	pagetable_free(virt_to_ptdesc(pgd));
 }
 
 static inline pgd_t *pgd_alloc(struct mm_struct *mm)
 {
 	pgd_t *new_pgd;
+	struct ptdesc *ptdesc = pagetable_alloc((GFP_DMA | GFP_NOWARN) &
+			~__GFP_HIGHMEM, 0);
 
-	new_pgd = (pgd_t *)__get_free_page(GFP_DMA | __GFP_NOWARN);
-	if (!new_pgd)
+	if (!ptdesc)
 		return NULL;
+	new_pgd = ptdesc_address(ptdesc);
+
 	memcpy(new_pgd, swapper_pg_dir, PTRS_PER_PGD * sizeof(pgd_t));
 	memset(new_pgd, 0, PAGE_OFFSET >> PGDIR_SHIFT);
 	return new_pgd;
diff --git a/arch/m68k/include/asm/sun3_pgalloc.h b/arch/m68k/include/asm/sun3_pgalloc.h
index 198036aff519..ff48573db2c0 100644
--- a/arch/m68k/include/asm/sun3_pgalloc.h
+++ b/arch/m68k/include/asm/sun3_pgalloc.h
@@ -17,10 +17,10 @@ 
 
 extern const char bad_pmd_string[];
 
-#define __pte_free_tlb(tlb,pte,addr)			\
-do {							\
-	pgtable_pte_page_dtor(pte);			\
-	tlb_remove_page((tlb), pte);			\
+#define __pte_free_tlb(tlb, pte, addr)				\
+do {								\
+	pagetable_pte_dtor(page_ptdesc(pte));			\
+	tlb_remove_page_ptdesc((tlb), page_ptdesc(pte));	\
 } while (0)
 
 static inline void pmd_populate_kernel(struct mm_struct *mm, pmd_t *pmd, pte_t *pte)
diff --git a/arch/m68k/mm/motorola.c b/arch/m68k/mm/motorola.c
index c75984e2d86b..594575a0780c 100644
--- a/arch/m68k/mm/motorola.c
+++ b/arch/m68k/mm/motorola.c
@@ -161,7 +161,7 @@  void *get_pointer_table(int type)
 			 * m68k doesn't have SPLIT_PTE_PTLOCKS for not having
 			 * SMP.
 			 */
-			pgtable_pte_page_ctor(virt_to_page(page));
+			pagetable_pte_ctor(virt_to_ptdesc(page));
 		}
 
 		mmu_page_ctor(page);
@@ -201,7 +201,7 @@  int free_pointer_table(void *table, int type)
 		list_del(dp);
 		mmu_page_dtor((void *)page);
 		if (type == TABLE_PTE)
-			pgtable_pte_page_dtor(virt_to_page((void *)page));
+			pagetable_pte_dtor(virt_to_ptdesc((void *)page));
 		free_page (page);
 		return 1;
 	} else if (ptable_list[type].next != dp) {