perfcounters: add context switch counter

Impact: add new feature, new sw counter

Add a counter that counts the number of context-switches a task
is doing.

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

1 files changed, 2 insertions, 2 deletions

diff --git a/include/linux/perf_counter.h b/include/linux/perf_counter.h
index e5d25bf8f74e..d2a16563415f 100644
--- a/include/linux/perf_counter.h
+++ b/include/linux/perf_counter.h
@@ -53,8 +53,8 @@ enum hw_event_types {
         /*
          * Future software events:
          */
-        /* PERF_COUNT_PAGE_FAULTS       = -3,
-           PERF_COUNT_CONTEXT_SWITCHES  = -4, */
+        PERF_COUNT_PAGE_FAULTS          = -3,
+        PERF_COUNT_CONTEXT_SWITCHES     = -4,
 };
 
 /*