typedef struct { volatile int counter; } atomic_t;
+local_t is very similar to atomic_t. If the counter is per CPU and only
+updated by one CPU, local_t is probably more appropriate. Please see
+Documentation/local_ops.txt for the semantics of local_t.
+
The first operations to implement for atomic_t's are the
initializers and plain reads.
void smp_mb__before_atomic_dec(void);
void smp_mb__after_atomic_dec(void);
void smp_mb__before_atomic_inc(void);
- void smp_mb__after_atomic_dec(void);
+ void smp_mb__after_atomic_inc(void);
For example, smp_mb__before_atomic_dec() can be used like so: