tracing/events: Add trace_define_common_fields()
Extract duplicate code. Also prepare for the later patch.
Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Frederic Weisbecker <fweisbec@gmail.com>
LKML-Reference: <4A8BAFB8.1010304@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 35b3a4a..427cbae 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -142,6 +142,7 @@
extern int trace_define_field(struct ftrace_event_call *call, char *type,
char *name, int offset, int size, int is_signed);
+extern int trace_define_common_fields(struct ftrace_event_call *call);
#define is_signed_type(type) (((type)(-1)) < 0)
@@ -166,11 +167,4 @@
__trace_printk(ip, fmt, ##args); \
} while (0)
-#define __common_field(type, item, is_signed) \
- ret = trace_define_field(event_call, #type, "common_" #item, \
- offsetof(typeof(field.ent), item), \
- sizeof(field.ent.item), is_signed); \
- if (ret) \
- return ret;
-
#endif /* _LINUX_FTRACE_EVENT_H */
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 4e81c9b..1274002 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -299,11 +299,9 @@
struct ftrace_raw_##call field; \
int ret; \
\
- __common_field(int, type, 1); \
- __common_field(unsigned char, flags, 0); \
- __common_field(unsigned char, preempt_count, 0); \
- __common_field(int, pid, 1); \
- __common_field(int, tgid, 1); \
+ ret = trace_define_common_fields(event_call); \
+ if (ret) \
+ return ret; \
\
tstruct; \
\