diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 43360c1..47bbdf9 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -137,13 +137,8 @@
 
 #define FTRACE_MAX_PROFILE_SIZE	2048
 
-struct perf_trace_buf {
-	char	buf[FTRACE_MAX_PROFILE_SIZE];
-	int	recursion;
-};
-
-extern struct perf_trace_buf	*perf_trace_buf;
-extern struct perf_trace_buf	*perf_trace_buf_nmi;
+extern char *perf_trace_buf;
+extern char *perf_trace_buf_nmi;
 
 #define MAX_FILTER_PRED		32
 #define MAX_FILTER_STR_VAL	256	/* Should handle KSYM_SYMBOL_LEN */