From fe14d2f12d5e641f114e27c2ea1fb85843c58967 Mon Sep 17 00:00:00 2001 From: Peter Zijlstra Date: Mon, 18 Apr 2016 01:09:20 +0200 Subject: locking/atomic, arch/alpha: Convert to _relaxed atomics Generic code will construct {,_acquire,_release} versions by adding the required smp_mb__{before,after}_atomic() calls. Signed-off-by: Peter Zijlstra (Intel) Cc: Andrew Morton Cc: Ivan Kokshaysky Cc: Linus Torvalds Cc: Matt Turner Cc: Paul E. McKenney Cc: Peter Zijlstra Cc: Richard Henderson Cc: Thomas Gleixner Cc: linux-alpha@vger.kernel.org Cc: linux-arch@vger.kernel.org Cc: linux-kernel@vger.kernel.org Signed-off-by: Ingo Molnar --- arch/alpha/include/asm/atomic.h | 36 ++++++++++++++++++++++++------------ 1 file changed, 24 insertions(+), 12 deletions(-) (limited to 'arch/alpha/include') diff --git a/arch/alpha/include/asm/atomic.h b/arch/alpha/include/asm/atomic.h index 5377ca8bb503..498933a7df97 100644 --- a/arch/alpha/include/asm/atomic.h +++ b/arch/alpha/include/asm/atomic.h @@ -46,10 +46,9 @@ static __inline__ void atomic_##op(int i, atomic_t * v) \ } \ #define ATOMIC_OP_RETURN(op, asm_op) \ -static inline int atomic_##op##_return(int i, atomic_t *v) \ +static inline int atomic_##op##_return_relaxed(int i, atomic_t *v) \ { \ long temp, result; \ - smp_mb(); \ __asm__ __volatile__( \ "1: ldl_l %0,%1\n" \ " " #asm_op " %0,%3,%2\n" \ @@ -61,15 +60,13 @@ static inline int atomic_##op##_return(int i, atomic_t *v) \ ".previous" \ :"=&r" (temp), "=m" (v->counter), "=&r" (result) \ :"Ir" (i), "m" (v->counter) : "memory"); \ - smp_mb(); \ return result; \ } #define ATOMIC_FETCH_OP(op, asm_op) \ -static inline int atomic_fetch_##op(int i, atomic_t *v) \ +static inline int atomic_fetch_##op##_relaxed(int i, atomic_t *v) \ { \ long temp, result; \ - smp_mb(); \ __asm__ __volatile__( \ "1: ldl_l %2,%1\n" \ " " #asm_op " %2,%3,%0\n" \ @@ -80,7 +77,6 @@ static inline int atomic_fetch_##op(int i, atomic_t *v) \ ".previous" \ :"=&r" (temp), "=m" (v->counter), "=&r" (result) \ :"Ir" (i), "m" (v->counter) : "memory"); \ - smp_mb(); \ return result; \ } @@ -101,10 +97,9 @@ static __inline__ void atomic64_##op(long i, atomic64_t * v) \ } \ #define ATOMIC64_OP_RETURN(op, asm_op) \ -static __inline__ long atomic64_##op##_return(long i, atomic64_t * v) \ +static __inline__ long atomic64_##op##_return_relaxed(long i, atomic64_t * v) \ { \ long temp, result; \ - smp_mb(); \ __asm__ __volatile__( \ "1: ldq_l %0,%1\n" \ " " #asm_op " %0,%3,%2\n" \ @@ -116,15 +111,13 @@ static __inline__ long atomic64_##op##_return(long i, atomic64_t * v) \ ".previous" \ :"=&r" (temp), "=m" (v->counter), "=&r" (result) \ :"Ir" (i), "m" (v->counter) : "memory"); \ - smp_mb(); \ return result; \ } #define ATOMIC64_FETCH_OP(op, asm_op) \ -static __inline__ long atomic64_fetch_##op(long i, atomic64_t * v) \ +static __inline__ long atomic64_fetch_##op##_relaxed(long i, atomic64_t * v) \ { \ long temp, result; \ - smp_mb(); \ __asm__ __volatile__( \ "1: ldq_l %2,%1\n" \ " " #asm_op " %2,%3,%0\n" \ @@ -135,7 +128,6 @@ static __inline__ long atomic64_fetch_##op(long i, atomic64_t * v) \ ".previous" \ :"=&r" (temp), "=m" (v->counter), "=&r" (result) \ :"Ir" (i), "m" (v->counter) : "memory"); \ - smp_mb(); \ return result; \ } @@ -150,6 +142,16 @@ static __inline__ long atomic64_fetch_##op(long i, atomic64_t * v) \ ATOMIC_OPS(add) ATOMIC_OPS(sub) +#define atomic_add_return_relaxed atomic_add_return_relaxed +#define atomic_sub_return_relaxed atomic_sub_return_relaxed +#define atomic_fetch_add_relaxed atomic_fetch_add_relaxed +#define atomic_fetch_sub_relaxed atomic_fetch_sub_relaxed + +#define atomic64_add_return_relaxed atomic64_add_return_relaxed +#define atomic64_sub_return_relaxed atomic64_sub_return_relaxed +#define atomic64_fetch_add_relaxed atomic64_fetch_add_relaxed +#define atomic64_fetch_sub_relaxed atomic64_fetch_sub_relaxed + #define atomic_andnot atomic_andnot #define atomic64_andnot atomic64_andnot @@ -165,6 +167,16 @@ ATOMIC_OPS(andnot, bic) ATOMIC_OPS(or, bis) ATOMIC_OPS(xor, xor) +#define atomic_fetch_and_relaxed atomic_fetch_and_relaxed +#define atomic_fetch_andnot_relaxed atomic_fetch_andnot_relaxed +#define atomic_fetch_or_relaxed atomic_fetch_or_relaxed +#define atomic_fetch_xor_relaxed atomic_fetch_xor_relaxed + +#define atomic64_fetch_and_relaxed atomic64_fetch_and_relaxed +#define atomic64_fetch_andnot_relaxed atomic64_fetch_andnot_relaxed +#define atomic64_fetch_or_relaxed atomic64_fetch_or_relaxed +#define atomic64_fetch_xor_relaxed atomic64_fetch_xor_relaxed + #undef ATOMIC_OPS #undef ATOMIC64_FETCH_OP #undef ATOMIC64_OP_RETURN -- cgit v1.2.3