diff options
Diffstat (limited to 'arch/hexagon/include/asm/atomic.h')
| -rw-r--r-- | arch/hexagon/include/asm/atomic.h | 21 |
1 files changed, 15 insertions, 6 deletions
diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h index 7aae4cb2a29..de916b11bff 100644 --- a/arch/hexagon/include/asm/atomic.h +++ b/arch/hexagon/include/asm/atomic.h @@ -24,9 +24,23 @@ #include <linux/types.h> #include <asm/cmpxchg.h> +#include <asm/barrier.h> #define ATOMIC_INIT(i) { (i) } -#define atomic_set(v, i) ((v)->counter = (i)) + +/* Normal writes in our arch don't clear lock reservations */ + +static inline void atomic_set(atomic_t *v, int new) +{ + asm volatile( + "1: r6 = memw_locked(%0);\n" + " memw_locked(%0,p0) = %1;\n" + " if (!P0) jump 1b;\n" + : + : "r" (&v->counter), "r" (new) + : "memory", "p0", "r6" + ); +} /** * atomic_read - reads a word, atomically @@ -163,9 +177,4 @@ static inline int __atomic_add_unless(atomic_t *v, int a, int u) #define atomic_inc_return(v) (atomic_add_return(1, v)) #define atomic_dec_return(v) (atomic_sub_return(1, v)) -#define smp_mb__before_atomic_dec() barrier() -#define smp_mb__after_atomic_dec() barrier() -#define smp_mb__before_atomic_inc() barrier() -#define smp_mb__after_atomic_inc() barrier() - #endif |