trace: add gcc printf check to trace_seq_printf
Andrew Morton suggested adding a printf checker to trace_seq_printf
since there are a number of users that have improper format arguments.
Signed-off-by: Steven Rostedt <srostedt@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h
index b2c1461..1cbab5e 100644
--- a/kernel/trace/trace_output.h
+++ b/kernel/trace/trace_output.h
@@ -16,7 +16,8 @@
trace_print_func binary;
};
-extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...);
+extern int trace_seq_printf(struct trace_seq *s, const char *fmt, ...)
+ __attribute__ ((format (printf, 2, 3)));
extern int
seq_print_ip_sym(struct trace_seq *s, unsigned long ip,
unsigned long sym_flags);