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Diffstat (limited to 'include/linux/perf_event.h')
-rw-r--r--include/linux/perf_event.h10
1 files changed, 5 insertions, 5 deletions
diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 6abf103fb7f8..bf85733597ec 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -565,8 +565,8 @@ struct pmu {
int *pmu_disable_count;
- void (*pmu_enable) (struct pmu *pmu);
- void (*pmu_disable) (struct pmu *pmu);
+ void (*pmu_enable) (struct pmu *pmu); /* optional */
+ void (*pmu_disable) (struct pmu *pmu); /* optional */
/*
* Should return -ENOENT when the @event doesn't match this PMU.
@@ -590,19 +590,19 @@ struct pmu {
* Start the transaction, after this ->enable() doesn't need to
* do schedulability tests.
*/
- void (*start_txn) (struct pmu *pmu);
+ void (*start_txn) (struct pmu *pmu); /* optional */
/*
* If ->start_txn() disabled the ->enable() schedulability test
* then ->commit_txn() is required to perform one. On success
* the transaction is closed. On error the transaction is kept
* open until ->cancel_txn() is called.
*/
- int (*commit_txn) (struct pmu *pmu);
+ int (*commit_txn) (struct pmu *pmu); /* optional */
/*
* Will cancel the transaction, assumes ->disable() is called
* for each successfull ->enable() during the transaction.
*/
- void (*cancel_txn) (struct pmu *pmu);
+ void (*cancel_txn) (struct pmu *pmu); /* optional */
};
/**