diff options
Diffstat (limited to 'arch/arm/include/asm/pgtable.h')
| -rw-r--r-- | arch/arm/include/asm/pgtable.h | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/arch/arm/include/asm/pgtable.h b/arch/arm/include/asm/pgtable.h index eaedce7b7e3a..4ee115f25511 100644 --- a/arch/arm/include/asm/pgtable.h +++ b/arch/arm/include/asm/pgtable.h @@ -220,6 +220,7 @@ static inline pte_t *pmd_page_vaddr(pmd_t pmd) #define pte_dirty(pte) (pte_val(pte) & L_PTE_DIRTY) #define pte_young(pte) (pte_val(pte) & L_PTE_YOUNG) #define pte_exec(pte) (!(pte_val(pte) & L_PTE_XN)) +#define pte_protnone(pte) (pte_val(pte) & L_PTE_NONE) #define pte_special(pte) (0) #define pte_present_user(pte) (pte_present(pte) && (pte_val(pte) & L_PTE_USER)) @@ -330,6 +331,23 @@ static inline pte_t pte_modify(pte_t pte, pgprot_t newprot) #define pgtable_cache_init() do { } while (0) +static inline void inc_gup_readers(struct mm_struct *mm) +{ + atomic_inc(&mm->context.gup_readers); + smp_mb__after_atomic_inc(); +} + +static inline void dec_gup_readers(struct mm_struct *mm) +{ + smp_mb__before_atomic_dec(); + atomic_dec(&mm->context.gup_readers); +} + +#ifdef CONFIG_TRANSPARENT_HUGEPAGE +#define arch_block_thp_split(mm) inc_gup_readers(mm) +#define arch_unblock_thp_split(mm) dec_gup_readers(mm) +#endif /* CONFIG_TRANSPARENT_HUGEPAGE */ + #endif /* !__ASSEMBLY__ */ #endif /* CONFIG_MMU */ |