diff options
Diffstat (limited to 'kernel/arch/powerpc/include/asm/pgtable.h')
| -rw-r--r-- | kernel/arch/powerpc/include/asm/pgtable.h | 17 |
1 files changed, 14 insertions, 3 deletions
diff --git a/kernel/arch/powerpc/include/asm/pgtable.h b/kernel/arch/powerpc/include/asm/pgtable.h index 11a38635d..b64b4212b 100644 --- a/kernel/arch/powerpc/include/asm/pgtable.h +++ b/kernel/arch/powerpc/include/asm/pgtable.h @@ -169,6 +169,17 @@ static inline void __set_pte_at(struct mm_struct *mm, unsigned long addr, * cases, and 32-bit non-hash with 32-bit PTEs. */ *ptep = pte; + +#ifdef CONFIG_PPC_BOOK3E_64 + /* + * With hardware tablewalk, a sync is needed to ensure that + * subsequent accesses see the PTE we just wrote. Unlike userspace + * mappings, we can't tolerate spurious faults, so make sure + * the new PTE will be seen the first time. + */ + if (is_kernel_addr(addr)) + mb(); +#endif #endif } @@ -248,15 +259,15 @@ extern int gup_hugepte(pte_t *ptep, unsigned long sz, unsigned long addr, #define has_transparent_hugepage() 0 #endif pte_t *__find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, - unsigned *shift); + bool *is_thp, unsigned *shift); static inline pte_t *find_linux_pte_or_hugepte(pgd_t *pgdir, unsigned long ea, - unsigned *shift) + bool *is_thp, unsigned *shift) { if (!arch_irqs_disabled()) { pr_info("%s called with irq enabled\n", __func__); dump_stack(); } - return __find_linux_pte_or_hugepte(pgdir, ea, shift); + return __find_linux_pte_or_hugepte(pgdir, ea, is_thp, shift); } #endif /* __ASSEMBLY__ */ |