Re: [PATCH v7 15/27] mm: Handle shadow stack page fault
From: Peter Zijlstra <peterz@infradead.org>
Date: 2019-06-07 07:31:32
Also in:
linux-arch, linux-doc, linux-mm, lkml
On Thu, Jun 06, 2019 at 01:06:34PM -0700, Yu-cheng Yu wrote:
quoted hunk ↗ jump to hunk
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