diff options
Diffstat (limited to 'arch/sh/include/asm/atomic.h')
| -rw-r--r-- | arch/sh/include/asm/atomic.h | 24 |
1 files changed, 8 insertions, 16 deletions
diff --git a/arch/sh/include/asm/atomic.h b/arch/sh/include/asm/atomic.h index 275a448ae8c..f57b8a6743b 100644 --- a/arch/sh/include/asm/atomic.h +++ b/arch/sh/include/asm/atomic.h @@ -9,11 +9,12 @@ #include <linux/compiler.h> #include <linux/types.h> -#include <asm/system.h> +#include <asm/cmpxchg.h> +#include <asm/barrier.h> -#define ATOMIC_INIT(i) ( (atomic_t) { (i) } ) +#define ATOMIC_INIT(i) { (i) } -#define atomic_read(v) ((v)->counter) +#define atomic_read(v) (*(volatile int *)&(v)->counter) #define atomic_set(v,i) ((v)->counter = (i)) #if defined(CONFIG_GUSA_RB) @@ -30,7 +31,6 @@ #define atomic_inc_and_test(v) (atomic_inc_return(v) == 0) #define atomic_sub_and_test(i,v) (atomic_sub_return((i), (v)) == 0) #define atomic_dec_and_test(v) (atomic_sub_return(1, (v)) == 0) -#define atomic_inc_not_zero(v) atomic_add_unless((v), 1, 0) #define atomic_inc(v) atomic_add(1, (v)) #define atomic_dec(v) atomic_sub(1, (v)) @@ -39,15 +39,15 @@ #define atomic_cmpxchg(v, o, n) (cmpxchg(&((v)->counter), (o), (n))) /** - * atomic_add_unless - add unless the number is a given value + * __atomic_add_unless - add unless the number is a given value * @v: pointer of type atomic_t * @a: the amount to add to v... * @u: ...unless v is equal to u. * * Atomically adds @a to @v, so long as it was not @u. - * Returns non-zero if @v was not @u, and zero otherwise. + * Returns the old value of @v. */ -static inline int atomic_add_unless(atomic_t *v, int a, int u) +static inline int __atomic_add_unless(atomic_t *v, int a, int u) { int c, old; c = atomic_read(v); @@ -60,15 +60,7 @@ static inline int atomic_add_unless(atomic_t *v, int a, int u) c = old; } - return c != (u); + return c; } -#define smp_mb__before_atomic_dec() smp_mb() -#define smp_mb__after_atomic_dec() smp_mb() -#define smp_mb__before_atomic_inc() smp_mb() -#define smp_mb__after_atomic_inc() smp_mb() - -#include <asm-generic/atomic-long.h> -#include <asm-generic/atomic64.h> - #endif /* __ASM_SH_ATOMIC_H */ |