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>
git-mirror · Jan 16, 2009 · c37abc5 · c37abc5
1 parent bb3c3c9
commit c37abc5
Showing 1 changed file with 2 additions and 1 deletion.
diff --git a/kernel/trace/trace_output.h b/kernel/trace/trace_output.h
@@ -16,7 +16,8 @@ struct trace_event {
 	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);