diff options
Diffstat (limited to 'arch/arm64/include/asm/atomic.h')
| -rw-r--r-- | arch/arm64/include/asm/atomic.h | 53 |
1 files changed, 30 insertions, 23 deletions
diff --git a/arch/arm64/include/asm/atomic.h b/arch/arm64/include/asm/atomic.h index 01de5aaa3edc..0237f0867e37 100644 --- a/arch/arm64/include/asm/atomic.h +++ b/arch/arm64/include/asm/atomic.h @@ -54,8 +54,7 @@ static inline void atomic_add(int i, atomic_t *v) " stxr %w1, %w0, %2\n" " cbnz %w1, 1b" : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) - : "Ir" (i) - : "cc"); + : "Ir" (i)); } static inline int atomic_add_return(int i, atomic_t *v) @@ -64,14 +63,15 @@ static inline int atomic_add_return(int i, atomic_t *v) int result; asm volatile("// atomic_add_return\n" -"1: ldaxr %w0, %2\n" +"1: ldxr %w0, %2\n" " add %w0, %w0, %w3\n" " stlxr %w1, %w0, %2\n" " cbnz %w1, 1b" : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) : "Ir" (i) - : "cc", "memory"); + : "memory"); + smp_mb(); return result; } @@ -86,8 +86,7 @@ static inline void atomic_sub(int i, atomic_t *v) " stxr %w1, %w0, %2\n" " cbnz %w1, 1b" : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) - : "Ir" (i) - : "cc"); + : "Ir" (i)); } static inline int atomic_sub_return(int i, atomic_t *v) @@ -96,14 +95,15 @@ static inline int atomic_sub_return(int i, atomic_t *v) int result; asm volatile("// atomic_sub_return\n" -"1: ldaxr %w0, %2\n" +"1: ldxr %w0, %2\n" " sub %w0, %w0, %w3\n" " stlxr %w1, %w0, %2\n" " cbnz %w1, 1b" : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) : "Ir" (i) - : "cc", "memory"); + : "memory"); + smp_mb(); return result; } @@ -112,17 +112,20 @@ static inline int atomic_cmpxchg(atomic_t *ptr, int old, int new) unsigned long tmp; int oldval; + smp_mb(); + asm volatile("// atomic_cmpxchg\n" -"1: ldaxr %w1, %2\n" +"1: ldxr %w1, %2\n" " cmp %w1, %w3\n" " b.ne 2f\n" -" stlxr %w0, %w4, %2\n" +" stxr %w0, %w4, %2\n" " cbnz %w0, 1b\n" "2:" : "=&r" (tmp), "=&r" (oldval), "+Q" (ptr->counter) : "Ir" (old), "r" (new) - : "cc", "memory"); + : "cc"); + smp_mb(); return oldval; } @@ -173,8 +176,7 @@ static inline void atomic64_add(u64 i, atomic64_t *v) " stxr %w1, %0, %2\n" " cbnz %w1, 1b" : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) - : "Ir" (i) - : "cc"); + : "Ir" (i)); } static inline long atomic64_add_return(long i, atomic64_t *v) @@ -183,14 +185,15 @@ static inline long atomic64_add_return(long i, atomic64_t *v) unsigned long tmp; asm volatile("// atomic64_add_return\n" -"1: ldaxr %0, %2\n" +"1: ldxr %0, %2\n" " add %0, %0, %3\n" " stlxr %w1, %0, %2\n" " cbnz %w1, 1b" : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) : "Ir" (i) - : "cc", "memory"); + : "memory"); + smp_mb(); return result; } @@ -205,8 +208,7 @@ static inline void atomic64_sub(u64 i, atomic64_t *v) " stxr %w1, %0, %2\n" " cbnz %w1, 1b" : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) - : "Ir" (i) - : "cc"); + : "Ir" (i)); } static inline long atomic64_sub_return(long i, atomic64_t *v) @@ -215,14 +217,15 @@ static inline long atomic64_sub_return(long i, atomic64_t *v) unsigned long tmp; asm volatile("// atomic64_sub_return\n" -"1: ldaxr %0, %2\n" +"1: ldxr %0, %2\n" " sub %0, %0, %3\n" " stlxr %w1, %0, %2\n" " cbnz %w1, 1b" : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) : "Ir" (i) - : "cc", "memory"); + : "memory"); + smp_mb(); return result; } @@ -231,17 +234,20 @@ static inline long atomic64_cmpxchg(atomic64_t *ptr, long old, long new) long oldval; unsigned long res; + smp_mb(); + asm volatile("// atomic64_cmpxchg\n" -"1: ldaxr %1, %2\n" +"1: ldxr %1, %2\n" " cmp %1, %3\n" " b.ne 2f\n" -" stlxr %w0, %4, %2\n" +" stxr %w0, %4, %2\n" " cbnz %w0, 1b\n" "2:" : "=&r" (res), "=&r" (oldval), "+Q" (ptr->counter) : "Ir" (old), "r" (new) - : "cc", "memory"); + : "cc"); + smp_mb(); return oldval; } @@ -253,11 +259,12 @@ static inline long atomic64_dec_if_positive(atomic64_t *v) unsigned long tmp; asm volatile("// atomic64_dec_if_positive\n" -"1: ldaxr %0, %2\n" +"1: ldxr %0, %2\n" " subs %0, %0, #1\n" " b.mi 2f\n" " stlxr %w1, %0, %2\n" " cbnz %w1, 1b\n" +" dmb ish\n" "2:" : "=&r" (result), "=&r" (tmp), "+Q" (v->counter) : |
