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x86/mm: implement arch_faults_on_old_pte() stub on x86 

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>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
alistair/sunxi64-5.5-dsi
Jia He 2019-10-11 22:09:38 +08:00 committed by Catalin Marinas
parent 6af31226d0
commit f2c4e5970c
1 changed files with 6 additions and 0 deletions
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6
arch/x86/include/asm/pgtable.h
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@ -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__ */