1 files changed, 10 insertions, 0 deletions

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 5cad0e6f3552..2cdc9d422bed 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -907,12 +907,22 @@ struct perf_pmu_events_attr {
         const char *event_str;
 };
 
+ssize_t perf_event_sysfs_show(struct device *dev, struct device_attribute *attr,
+                              char *page);
+
 #define PMU_EVENT_ATTR(_name, _var, _id, _show)                         \
 static struct perf_pmu_events_attr _var = {                             \
         .attr = __ATTR(_name, 0444, _show, NULL),                       \
         .id   =  _id,                                                   \
 };
 
+#define PMU_EVENT_ATTR_STRING(_name, _var, _str)                            \
+static struct perf_pmu_events_attr _var = {                                 \
+        .attr           = __ATTR(_name, 0444, perf_event_sysfs_show, NULL), \
+        .id             = 0,                                                \
+        .event_str      = _str,                                             \
+};
+
 #define PMU_FORMAT_ATTR(_name, _format)                                 \
 static ssize_t                                                          \
 _name##_show(struct device *dev,                                        \