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-rw-r--r--kernel/trace/trace.h17
1 files changed, 17 insertions, 0 deletions
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index cede1ab49d0..35cfa7bbaf3 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -773,4 +773,21 @@ void event_trace_printk(unsigned long ip, const char *fmt, ...);
extern struct ftrace_event_call __start_ftrace_events[];
extern struct ftrace_event_call __stop_ftrace_events[];
+extern const char *__start___trace_bprintk_fmt[];
+extern const char *__stop___trace_bprintk_fmt[];
+
+#define event_trace_printk(ip, fmt, args...) \
+do { \
+ __trace_printk_check_format(fmt, ##args); \
+ tracing_record_cmdline(current); \
+ if (__builtin_constant_p(fmt)) { \
+ static const char *trace_printk_fmt \
+ __attribute__((section("__trace_printk_fmt"))) = \
+ __builtin_constant_p(fmt) ? fmt : NULL; \
+ \
+ __trace_bprintk(ip, trace_printk_fmt, ##args); \
+ } else \
+ __trace_printk(ip, fmt, ##args); \
+} while (0)
+
#endif /* _LINUX_KERNEL_TRACE_H */