[PATCH 5/9] tracing: Remove test of NULL define_fields callback

Steven Rostedt
2010-06-29T03:12:32Z

[-- Attachment #1: 0005-tracing-Remove-test-of-NULL-define_fields-callback.patch --]
[-- Type: text/plain, Size: 2833 bytes --]

From: Li Zefan <lizf@cn.fujitsu.com>

Every event (or event class) has it's define_fields callback,
so the test is redundant.

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
LKML-Reference: <4BFA37BC.8080707@cn.fujitsu.com>
Signed-off-by: Steven Rostedt <rostedt@goodmis.org>
---
kernel/trace/trace_events.c | 28 +++++++++++++---------------
kernel/trace/trace_events_filter.c | 9 ---------
2 files changed, 13 insertions(+), 24 deletions(-)

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index d3b4bdf..5bad9cb 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -987,23 +987,21 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
id);
#endif

- if (call->class->define_fields) {
- /*
- * Other events may have the same class. Only update
- * the fields if they are not already defined.
- */
- head = trace_get_fields(call);
- if (list_empty(head)) {
- ret = call->class->define_fields(call);
- if (ret < 0) {
- pr_warning("Could not initialize trace point"
- " events/%s\n", call->name);
- return ret;
- }
+ /*
+ * Other events may have the same class. Only update
+ * the fields if they are not already defined.
+ */
+ head = trace_get_fields(call);
+ if (list_empty(head)) {
+ ret = call->class->define_fields(call);
+ if (ret < 0) {
+ pr_warning("Could not initialize trace point"
+ " events/%s\n", call->name);
+ return ret;
}
- trace_create_file("filter", 0644, call->dir, call,
- filter);
}
+ trace_create_file("filter", 0644, call->dir, call,
+ filter);

trace_create_file("format", 0444, call->dir, call,
format);
diff --git a/kernel/trace/trace_events_filter.c b/kernel/trace/trace_events_filter.c
index 330fefd..36d4010 100644
--- a/kernel/trace/trace_events_filter.c
+++ b/kernel/trace/trace_events_filter.c
@@ -639,9 +639,6 @@ static int init_subsystem_preds(struct event_subsystem *system)
int err;

list_for_each_entry(call, &ftrace_events, list) {
- if (!call->class || !call->class->define_fields)
- continue;
-
if (strcmp(call->class->system, system->name) != 0)
continue;

@@ -658,9 +655,6 @@ static void filter_free_subsystem_preds(struct event_subsystem *system)
struct ftrace_event_call *call;

list_for_each_entry(call, &ftrace_events, list) {
- if (!call->class || !call->class->define_fields)
- continue;
-
if (strcmp(call->class->system, system->name) != 0)
continue;

@@ -1263,9 +1257,6 @@ static int replace_system_preds(struct event_subsystem *system,
list_for_each_entry(call, &ftrace_events, list) {
struct event_filter *filter = call->filter;

- if (!call->class || !call->class->define_fields)
- continue;
-
if (strcmp(call->class->system, system->name) != 0)
continue;

--
1.7.1