tracing: avoid warnings from zero-arg tracepoints
Tracepoints with no arguments can issue two warnings:
"field" defined by not used
"ret" is uninitialized in this function
Mark field as being OK to leave unused, and initialize ret.
[ Impact: fix false positive compiler warnings. ]
Signed-off-by: Jeremy Fitzhardinge <jeremy.fitzhardinge@citrix.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: mathieu.desnoyers@polymtl.ca
LKML-Reference: <1239950139-1119-5-git-send-email-jeremy@goop.org>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 60c5323..39a3351 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -160,8 +160,8 @@
static int \
ftrace_format_##call(struct trace_seq *s) \
{ \
- struct ftrace_raw_##call field; \
- int ret; \
+ struct ftrace_raw_##call field __attribute__((unused)); \
+ int ret = 0; \
\
tstruct; \
\