perf: add PMU_EVENT_ATTR_STRING() helper

Helper for constructing static struct perf_pmu_events_attr s.

Signed-off-by: Cody P Schafer <cody@linux.vnet.ibm.com>
Signed-off-by: Sukadev Bhattiprolu <sukadev@linux.vnet.ibm.com>
Acked-by: Jiri Olsa <jolsa@redhat.com>
Signed-off-by: Michael Ellerman <mpe@ellerman.id.au>

1 files changed, 7 insertions, 0 deletions

diff --git a/include/linux/perf_event.h b/include/linux/perf_event.h
index 58f59bdb590b..1d3631448b91 100644
--- a/include/linux/perf_event.h
+++ b/include/linux/perf_event.h
@@ -906,6 +906,13 @@ static struct perf_pmu_events_attr _var = {				\
         .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,                                        \