[PATCH] tracing/osnoise: Add __printf attribute to osnoise_print()

[Adrián García Casado]

Building kernel/trace/trace_osnoise.o with W=1 triggers the following
compiler warning:

  kernel/trace/trace_osnoise.c:96:17: warning: function 'osnoise_print'
  might be a candidate for 'gnu_printf' format attribute
  [-Wsuggest-attribute=format]

osnoise_print() forwards its format string and va_list arguments to
trace_array_vprintk(), which is annotated with __printf(3, 0).

Add the __printf(1, 2) attribute to osnoise_print() to silence the W=1
warning and enable compile-time format string checking for its callers.

Signed-off-by: Adrián García Casado <adriangarciacasado42@xxxxxxxxx>
---
 kernel/trace/trace_osnoise.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/kernel/trace/trace_osnoise.c b/kernel/trace/trace_osnoise.c
index 0e1265acd1..995da9e0b5 100644
--- a/kernel/trace/trace_osnoise.c
+++ b/kernel/trace/trace_osnoise.c
@@ -83,6 +83,7 @@ struct osnoise_instance {
 
 static struct list_head osnoise_instances;
 
+__printf(1, 2)
 static void osnoise_print(const char *fmt, ...)
 {
 	struct osnoise_instance *inst;
-- 
2.39.5