1 files changed, 4 insertions, 0 deletions

diff --git a/arch/alpha/kernel/perf_event.c b/arch/alpha/kernel/perf_event.c
index 8143cd7cdbfb..0dae252f7a33 100644
--- a/arch/alpha/kernel/perf_event.c
+++ b/arch/alpha/kernel/perf_event.c
@@ -685,6 +685,10 @@ static int alpha_pmu_event_init(struct perf_event *event)
 {
         int err;
 
+        /* does not support taken branch sampling */
+        if (has_branch_stack(event))
+                return -EOPNOTSUPP;
+
         switch (event->attr.type) {
         case PERF_TYPE_RAW:
         case PERF_TYPE_HARDWARE: