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perf counters: clean up state transitions

Browse source 
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>
This commit is contained in:
Ingo Molnar 2008-12-11 15:17:03 +01:00
commit 6a930700c8
3 changed files with 25 additions and 17 deletions
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11
include/linux/perf_counter.h
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@ -127,6 +127,15 @@ struct hw_perf_counter_ops {
void (*hw_perf_counter_read) (struct perf_counter *counter);
};
/**
* 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:
*/
@ -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