tracing: Pull up calls to trace_define_common_fields()

Call trace_define_common_fields() in event_create_dir() only.
This avoids trace events to handle it from their define_fields
callbacks and shrinks the kernel code size:

   text    data     bss     dec     hex filename
5346802 1961864 7103260 14411926         dbe896 vmlinux.o.old
5345151 1961864 7103260 14410275         dbe223 vmlinux.o

Signed-off-by: Li Zefan <lizf@cn.fujitsu.com>
Acked-by: Steven Rostedt <rostedt@goodmis.org>
Cc: Ingo Molnar <mingo@elte.hu>
Cc: Jason Baron <jbaron@redhat.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
LKML-Reference: <4B1DC49C.8000107@cn.fujitsu.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>

diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index ea44b89..db97c64 100644 (file)
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -159,7 +159,6 @@ enum {
 };
 
 extern int trace_event_raw_init(struct ftrace_event_call *call);
-extern int trace_define_common_fields(struct ftrace_event_call *call);
 extern int trace_define_field(struct ftrace_event_call *call, const char *type,
                              const char *name, int offset, int size,
                              int is_signed, int filter_type);

diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index 6055b06..2af2f7a 100644 (file)
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -436,10 +436,6 @@ ftrace_define_fields_##call(struct ftrace_event_call *event_call)  \
        struct ftrace_raw_##call field;                                 \
        int ret;                                                        \
                                                                        \
-       ret = trace_define_common_fields(event_call);                   \
-       if (ret)                                                        \
-               return ret;                                             \
-                                                                       \
        tstruct;                                                        \
                                                                        \
        return ret;                                                     \

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 8ed66e0..97b0b3a 100644 (file)
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -78,7 +78,7 @@ EXPORT_SYMBOL_GPL(trace_define_field);
        if (ret)                                                        \
                return ret;
 
-int trace_define_common_fields(struct ftrace_event_call *call)
+static int trace_define_common_fields(struct ftrace_event_call *call)
 {
        int ret;
        struct trace_entry ent;
@@ -91,7 +91,6 @@ int trace_define_common_fields(struct ftrace_event_call *call)
 
        return ret;
 }
-EXPORT_SYMBOL_GPL(trace_define_common_fields);
 
 void trace_destroy_fields(struct ftrace_event_call *call)
 {
@@ -927,7 +926,9 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
                                  id);
 
        if (call->define_fields) {
-               ret = call->define_fields(call);
+               ret = trace_define_common_fields(call);
+               if (!ret)
+                       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 dff8c84..458e5bf 100644 (file)
--- a/kernel/trace/trace_export.c
+++ b/kernel/trace/trace_export.c
@@ -184,10 +184,6 @@ ftrace_define_fields_##name(struct ftrace_event_call *event_call)  \
        struct struct_name field;                                       \
        int ret;                                                        \
                                                                        \
-       ret = trace_define_common_fields(event_call);                   \
-       if (ret)                                                        \
-               return ret;                                             \
-                                                                       \
        tstruct;                                                        \
                                                                        \
        return ret;                                                     \

diff --git a/kernel/trace/trace_kprobe.c b/kernel/trace/trace_kprobe.c
index aff5f80..e3c80e9 100644 (file)
--- a/kernel/trace/trace_kprobe.c
+++ b/kernel/trace/trace_kprobe.c
@@ -1113,10 +1113,6 @@ static int kprobe_event_define_fields(struct ftrace_event_call *event_call)
        struct kprobe_trace_entry field;
        struct trace_probe *tp = (struct trace_probe *)event_call->data;
 
-       ret = trace_define_common_fields(event_call);
-       if (!ret)
-               return ret;
-
        DEFINE_FIELD(unsigned long, ip, FIELD_STRING_IP, 0);
        DEFINE_FIELD(int, nargs, FIELD_STRING_NARGS, 1);
        /* Set argument names as fields */
@@ -1131,10 +1127,6 @@ static int kretprobe_event_define_fields(struct ftrace_event_call *event_call)
        struct kretprobe_trace_entry field;
        struct trace_probe *tp = (struct trace_probe *)event_call->data;
 
-       ret = trace_define_common_fields(event_call);
-       if (!ret)
-               return ret;
-
        DEFINE_FIELD(unsigned long, func, FIELD_STRING_FUNC, 0);
        DEFINE_FIELD(unsigned long, ret_ip, FIELD_STRING_RETIP, 0);
        DEFINE_FIELD(int, nargs, FIELD_STRING_NARGS, 1);

diff --git a/kernel/trace/trace_syscalls.c b/kernel/trace/trace_syscalls.c
index 57501d9..b957edd 100644 (file)
--- a/kernel/trace/trace_syscalls.c
+++ b/kernel/trace/trace_syscalls.c
@@ -217,10 +217,6 @@ int syscall_enter_define_fields(struct ftrace_event_call *call)
        int i;
        int offset = offsetof(typeof(trace), args);
 
-       ret = trace_define_common_fields(call);
-       if (ret)
-               return ret;
-
        ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
        if (ret)
                return ret;
@@ -241,10 +237,6 @@ int syscall_exit_define_fields(struct ftrace_event_call *call)
        struct syscall_trace_exit trace;
        int ret;
 
-       ret = trace_define_common_fields(call);
-       if (ret)
-               return ret;
-
        ret = trace_define_field(call, SYSCALL_FIELD(int, nr), FILTER_OTHER);
        if (ret)
                return ret;