Messages in this thread | | | Date | Fri, 7 Jun 2019 09:30:52 +0200 | From | Peter Zijlstra <> | Subject | Re: [PATCH v7 15/27] mm: Handle shadow stack page fault |
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On Thu, Jun 06, 2019 at 01:06:34PM -0700, Yu-cheng Yu wrote:
> diff --git a/include/asm-generic/pgtable.h b/include/asm-generic/pgtable.h > index 75d9d68a6de7..ffcc0be7cadc 100644 > --- a/include/asm-generic/pgtable.h > +++ b/include/asm-generic/pgtable.h > @@ -1188,4 +1188,12 @@ static inline bool arch_has_pfn_modify_check(void) > #define mm_pmd_folded(mm) __is_defined(__PAGETABLE_PMD_FOLDED) > #endif > > +#ifndef CONFIG_ARCH_HAS_SHSTK > +#define pte_set_vma_features(pte, vma) pte > +#define arch_copy_pte_mapping(vma_flags) false
static inline pte_t pte_set_vma_features(pte_t pte, struct vm_area_struct *vma) { return pte; }
static inline bool arch_copy_pte_mapping(unsigned long vm_flags) { return false; }
Please, this way we retain function prototype checking.
> +#else > +pte_t pte_set_vma_features(pte_t pte, struct vm_area_struct *vma); > +bool arch_copy_pte_mapping(vm_flags_t vm_flags); > +#endif
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