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Diffstat (limited to 'arch/cris/include/asm/atomic.h')
-rw-r--r--arch/cris/include/asm/atomic.h59
1 files changed, 26 insertions, 33 deletions
diff --git a/arch/cris/include/asm/atomic.h b/arch/cris/include/asm/atomic.h
index aa429baebaf9..279766a70664 100644
--- a/arch/cris/include/asm/atomic.h
+++ b/arch/cris/include/asm/atomic.h
@@ -17,48 +17,41 @@
#define ATOMIC_INIT(i) { (i) }
-#define atomic_read(v) (*(volatile int *)&(v)->counter)
+#define atomic_read(v) ACCESS_ONCE((v)->counter)
#define atomic_set(v,i) (((v)->counter) = (i))
/* These should be written in asm but we do it in C for now. */
-static inline void atomic_add(int i, volatile atomic_t *v)
-{
- unsigned long flags;
- cris_atomic_save(v, flags);
- v->counter += i;
- cris_atomic_restore(v, flags);
+#define ATOMIC_OP(op, c_op) \
+static inline void atomic_##op(int i, volatile atomic_t *v) \
+{ \
+ unsigned long flags; \
+ cris_atomic_save(v, flags); \
+ v->counter c_op i; \
+ cris_atomic_restore(v, flags); \
+} \
+
+#define ATOMIC_OP_RETURN(op, c_op) \
+static inline int atomic_##op##_return(int i, volatile atomic_t *v) \
+{ \
+ unsigned long flags; \
+ int retval; \
+ cris_atomic_save(v, flags); \
+ retval = (v->counter c_op i); \
+ cris_atomic_restore(v, flags); \
+ return retval; \
}
-static inline void atomic_sub(int i, volatile atomic_t *v)
-{
- unsigned long flags;
- cris_atomic_save(v, flags);
- v->counter -= i;
- cris_atomic_restore(v, flags);
-}
+#define ATOMIC_OPS(op, c_op) ATOMIC_OP(op, c_op) ATOMIC_OP_RETURN(op, c_op)
-static inline int atomic_add_return(int i, volatile atomic_t *v)
-{
- unsigned long flags;
- int retval;
- cris_atomic_save(v, flags);
- retval = (v->counter += i);
- cris_atomic_restore(v, flags);
- return retval;
-}
+ATOMIC_OPS(add, +=)
+ATOMIC_OPS(sub, -=)
-#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
+#undef ATOMIC_OPS
+#undef ATOMIC_OP_RETURN
+#undef ATOMIC_OP
-static inline int atomic_sub_return(int i, volatile atomic_t *v)
-{
- unsigned long flags;
- int retval;
- cris_atomic_save(v, flags);
- retval = (v->counter -= i);
- cris_atomic_restore(v, flags);
- return retval;
-}
+#define atomic_add_negative(a, v) (atomic_add_return((a), (v)) < 0)
static inline int atomic_sub_and_test(int i, volatile atomic_t *v)
{