diff --git a/[refs] b/[refs]
index 624644bec95d..d292c74b2844 100644
--- a/[refs]
+++ b/[refs]
@@ -1,2 +1,2 @@
 ---
-refs/heads/master: 90151c35b19633e0cab5a6c80f1ba4a51e7c913b
+refs/heads/master: 74048f895fa8cbf8119b4999f1f44881a825f954
diff --git a/trunk/kernel/perf_event.c b/trunk/kernel/perf_event.c
index 42a0e9191af5..858f56fa2432 100644
--- a/trunk/kernel/perf_event.c
+++ b/trunk/kernel/perf_event.c
@@ -3064,6 +3064,7 @@ __always_inline void perf_output_copy(struct perf_output_handle *handle,
 
 		len -= size;
 		handle->addr += size;
+		buf += size;
 		handle->size -= size;
 		if (!handle->size) {
 			struct perf_mmap_data *data = handle->data;