perf counters: clean up state transitions

Impact: cleanup

Introduce a proper enum for the 3 states of a counter:

	PERF_COUNTER_STATE_OFF		= -1
	PERF_COUNTER_STATE_INACTIVE	=  0
	PERF_COUNTER_STATE_ACTIVE	=  1

and rename counter->active to counter->state and propagate the
changes everywhere.

Signed-off-by: Ingo Molnar <mingo@elte.hu>

1 files changed, 10 insertions, 1 deletions

diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index 97d86c293ee8..8cb095fa442c 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -128,6 +128,15 @@ struct hw_perf_counter_ops {
 };
 
 /**
+ * enum perf_counter_active_state - the states of a counter
+ */
+enum perf_counter_active_state {
+        PERF_COUNTER_STATE_OFF          = -1,
+        PERF_COUNTER_STATE_INACTIVE     =  0,
+        PERF_COUNTER_STATE_ACTIVE       =  1,
+};
+
+/**
  * struct perf_counter - performance counter kernel representation:
  */
 struct perf_counter {
@@ -136,7 +145,7 @@ struct perf_counter {
         struct perf_counter             *group_leader;
         const struct hw_perf_counter_ops *hw_ops;
 
-        int                             active;
+        enum perf_counter_active_state  state;
 #if BITS_PER_LONG == 64
         atomic64_t                      count;
 #else