diff options
author | Peter Zijlstra <peterz@infradead.org> | 2020-01-31 13:45:39 +0100 |
---|---|---|
committer | Geert Uytterhoeven <geert@linux-m68k.org> | 2020-02-10 10:57:48 +0100 |
commit | 0e071ee6815692a3b241bbe9a9a29f7cdec023ed (patch) | |
tree | fa516f2a287d2f5315a98ebeeb472d46dc6f9ddc /arch/m68k/include | |
parent | 61c64a25ae8df45c2cd2f76343e20c3d266382ea (diff) |
m68k: mm: Extend table allocator for multiple sizes
In addition to the PGD/PMD table size (128*4) add a PTE table size
(64*4) to the table allocator. This completely removes the pte-table
overhead compared to the old code, even for dense tables.
Notes:
- the allocator gained a list_empty() check to deal with there not
being any pages at all.
- the free mask is extended to cover more than the 8 bits required
for the (512 byte) PGD/PMD tables.
- NR_PAGETABLE accounting is restored.
Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Will Deacon <will@kernel.org>
Acked-by: Greg Ungerer <gerg@linux-m68k.org>
Tested-by: Michael Schmitz <schmitzmic@gmail.com>
Tested-by: Greg Ungerer <gerg@linux-m68k.org>
Link: https://lore.kernel.org/r/20200131125403.882175409@infradead.org
Signed-off-by: Geert Uytterhoeven <geert@linux-m68k.org>
Diffstat (limited to 'arch/m68k/include')
-rw-r--r-- | arch/m68k/include/asm/motorola_pgalloc.h | 31 |
1 files changed, 19 insertions, 12 deletions
diff --git a/arch/m68k/include/asm/motorola_pgalloc.h b/arch/m68k/include/asm/motorola_pgalloc.h index c15e04277be7..c66e42917912 100644 --- a/arch/m68k/include/asm/motorola_pgalloc.h +++ b/arch/m68k/include/asm/motorola_pgalloc.h @@ -8,61 +8,68 @@ extern void mmu_page_ctor(void *page); extern void mmu_page_dtor(void *page); -extern pmd_t *get_pointer_table(void); -extern int free_pointer_table(pmd_t *); +enum m68k_table_types { + TABLE_PGD = 0, + TABLE_PMD = 0, /* same size as PGD */ + TABLE_PTE = 1, +}; + +extern void init_pointer_table(void *table, int type); +extern void *get_pointer_table(int type); +extern int free_pointer_table(void *table, int type); static inline pte_t *pte_alloc_one_kernel(struct mm_struct *mm) { - return (pte_t *)get_pointer_table(); + return get_pointer_table(TABLE_PTE); } static inline void pte_free_kernel(struct mm_struct *mm, pte_t *pte) { - free_pointer_table((void *)pte); + free_pointer_table(pte, TABLE_PTE); } static inline pgtable_t pte_alloc_one(struct mm_struct *mm) { - return (pte_t *)get_pointer_table(); + return get_pointer_table(TABLE_PTE); } static inline void pte_free(struct mm_struct *mm, pgtable_t pgtable) { - free_pointer_table((void *)pgtable); + free_pointer_table(pgtable, TABLE_PTE); } static inline void __pte_free_tlb(struct mmu_gather *tlb, pgtable_t pgtable, unsigned long address) { - free_pointer_table((void *)pgtable); + free_pointer_table(pgtable, TABLE_PTE); } static inline pmd_t *pmd_alloc_one(struct mm_struct *mm, unsigned long address) { - return get_pointer_table(); + return get_pointer_table(TABLE_PMD); } static inline int pmd_free(struct mm_struct *mm, pmd_t *pmd) { - return free_pointer_table(pmd); + return free_pointer_table(pmd, TABLE_PMD); } static inline int __pmd_free_tlb(struct mmu_gather *tlb, pmd_t *pmd, unsigned long address) { - return free_pointer_table(pmd); + return free_pointer_table(pmd, TABLE_PMD); } static inline void pgd_free(struct mm_struct *mm, pgd_t *pgd) { - pmd_free(mm, (pmd_t *)pgd); + free_pointer_table(pgd, TABLE_PGD); } static inline pgd_t *pgd_alloc(struct mm_struct *mm) { - return (pgd_t *)get_pointer_table(); + return get_pointer_table(TABLE_PGD); } |