| Message ID | 20191009084246.123354-4-justin.he@arm.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | fix double page fault in cow_user_page for pfn mapping | expand |
diff --git a/arch/x86/include/asm/pgtable.h b/arch/x86/include/asm/pgtable.h index 0bc530c4eb13..ad97dc155195 100644 --- a/arch/x86/include/asm/pgtable.h +++ b/arch/x86/include/asm/pgtable.h @@ -1463,6 +1463,12 @@ static inline bool arch_has_pfn_modify_check(void) return boot_cpu_has_bug(X86_BUG_L1TF); } +#define arch_faults_on_old_pte arch_faults_on_old_pte +static inline bool arch_faults_on_old_pte(void) +{ + return false; +} + #include <asm-generic/pgtable.h> #endif /* __ASSEMBLY__ */
arch_faults_on_old_pte is a helper to indicate that it might cause page fault when accessing old pte. But on x86, there is feature to setting pte access flag by hardware. Hence implement an overriding stub which always returns false. Signed-off-by: Jia He <justin.he@arm.com> Suggested-by: Will Deacon <will@kernel.org> --- arch/x86/include/asm/pgtable.h | 6 ++++++ 1 file changed, 6 insertions(+)