diff --git a/arch/arm64/include/asm/pgtable.h b/arch/arm64/include/asm/pgtable.h index 3ce0f2a6cab6..3e579c26b383 100644 --- a/arch/arm64/include/asm/pgtable.h +++ b/arch/arm64/include/asm/pgtable.h @@ -1838,7 +1838,16 @@ static inline bool ptep_try_set(pte_t *ptep, pte_t new_pte) { pteval_t old = 0; - return try_cmpxchg(&pte_val(*ptep), &old, pte_val(new_pte)); + if (!try_cmpxchg(&pte_val(*ptep), &old, pte_val(new_pte))) + return false; + + /* + * The store must be complete by the time this returns, but the caller + * may be in lazy MMU mode, where __set_pte_complete() would defer the + * barriers. Issue them directly. + */ + emit_pte_barriers(); + return true; } #define ptep_try_set ptep_try_set