tracing/events: Add ftrace_event_call param to define_fields()

This parameter is needed by syscall events to add define_fields()
handler.

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: <4A8BAF90.6060801@cn.fujitsu.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

4 files changed, 5 insertions, 7 deletions

diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 189806b6e69e..35b3a4a5ba86 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -118,7 +118,7 @@ struct ftrace_event_call {
         int                     (*raw_init)(void);
         int                     (*show_format)(struct ftrace_event_call *call,
                                                struct trace_seq *s);
-        int                     (*define_fields)(void);
+        int                     (*define_fields)(struct ftrace_event_call *);
         struct list_head        fields;
         int                     filter_active;
         struct event_filter     *filter;
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index b250b0616571..4e81c9b37515 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -294,10 +294,9 @@ ftrace_raw_output_##call(struct trace_iterator *iter, int flags)	\
 #undef TRACE_EVENT
 #define TRACE_EVENT(call, proto, args, tstruct, func, print)            \
 int                                                                     \
-ftrace_define_fields_##call(void)                                       \
+ftrace_define_fields_##call(struct ftrace_event_call *event_call)       \
 {                                                                       \
         struct ftrace_raw_##call field;                                 \
-        struct ftrace_event_call *event_call = &event_##call;           \
         int ret;                                                        \
                                                                         \
         __common_field(int, type, 1);                                   \
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index b568ade8f453..af8fb8ebef0b 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -941,7 +941,7 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
                                           id);
 
         if (call->define_fields) {
-                ret = call->define_fields();
+                ret = call->define_fields(call);
                 if (ret < 0) {
                         pr_warning("Could not initialize trace point"
                                    " events/%s\n", call->name);
diff --git a/kernel/trace/trace_export.c b/kernel/trace/trace_export.c
index 956d4bc675e5..cf2c752a25bf 100644
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -119,7 +119,7 @@ ftrace_format_##call(struct ftrace_event_call *unused,			\
 
 #undef TRACE_EVENT_FORMAT
 #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)      \
-int ftrace_define_fields_##call(void);                                  \
+int ftrace_define_fields_##call(struct ftrace_event_call *event_call);  \
 static int ftrace_raw_init_event_##call(void);                          \
                                                                         \
 struct ftrace_event_call __used                                         \
@@ -184,9 +184,8 @@ __attribute__((section("_ftrace_events"))) event_##call = {		\
 #undef TRACE_EVENT_FORMAT
 #define TRACE_EVENT_FORMAT(call, proto, args, fmt, tstruct, tpfmt)      \
 int                                                                     \
-ftrace_define_fields_##call(void)                                       \
+ftrace_define_fields_##call(struct ftrace_event_call *event_call)       \
 {                                                                       \
-        struct ftrace_event_call *event_call = &event_##call;           \
         struct args field;                                              \
         int ret;                                                        \
                                                                         \