[tip:tracing/urgent] tracing: Extract duplicate ftrace_raw_init_event_foo()
From: tip-bot for Li Zefan
Date: Mon Dec 14 2009 - 04:46:44 EST
Commit-ID: 87d9b4e1c52867a45331a9a5495f6448e0c68b23
Gitweb: http://git.kernel.org/tip/87d9b4e1c52867a45331a9a5495f6448e0c68b23
Author: Li Zefan <lizf@xxxxxxxxxxxxxx>
AuthorDate: Tue, 8 Dec 2009 11:14:20 +0800
Committer: Frederic Weisbecker <fweisbec@xxxxxxxxx>
CommitDate: Sun, 13 Dec 2009 18:34:23 +0100
tracing: Extract duplicate ftrace_raw_init_event_foo()
Use a generic trace_event_raw_init() function for all event's raw_init
callbacks (but kprobes) instead of defining the same version for each
of these.
This shrinks the kernel code:
text data bss dec hex filename
5355293 1961928 7103260 14420481 dc0a01 vmlinux.o.old
5346802 1961864 7103260 14411926 dbe896 vmlinux.o
raw_init can't be removed, because ftrace events and kprobe events
use different raw_init callbacks. Though it's possible to totally
remove raw_init, I choose to leave it as it is for now.
Signed-off-by: Li Zefan <lizf@xxxxxxxxxxxxxx>
Acked-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
Cc: Jason Baron <jbaron@xxxxxxxxxx>
Cc: Ingo Molnar <mingo@xxxxxxx>
LKML-Reference: <4B1DC48C.7080603@xxxxxxxxxxxxxx>
Signed-off-by: Frederic Weisbecker <fweisbec@xxxxxxxxx>
---
include/linux/ftrace_event.h | 1 +
include/linux/syscalls.h | 4 ++--
include/trace/ftrace.h | 35 ++++-------------------------------
kernel/trace/trace_events.c | 14 ++++++++++++++
4 files changed, 21 insertions(+), 33 deletions(-)
diff --git a/include/linux/ftrace_event.h b/include/linux/ftrace_event.h
index 38f8d65..ea44b89 100644
--- a/include/linux/ftrace_event.h
+++ b/include/linux/ftrace_event.h
@@ -158,6 +158,7 @@ enum {
FILTER_PTR_STRING,
};
+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,
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index bc70c58..94ac284 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -145,7 +145,7 @@ struct perf_event_attr;
.name = "sys_enter"#sname, \
.system = "syscalls", \
.event = &enter_syscall_print_##sname, \
- .raw_init = init_syscall_trace, \
+ .raw_init = trace_event_raw_init, \
.show_format = syscall_enter_format, \
.define_fields = syscall_enter_define_fields, \
.regfunc = reg_event_syscall_enter, \
@@ -167,7 +167,7 @@ struct perf_event_attr;
.name = "sys_exit"#sname, \
.system = "syscalls", \
.event = &exit_syscall_print_##sname, \
- .raw_init = init_syscall_trace, \
+ .raw_init = trace_event_raw_init, \
.show_format = syscall_exit_format, \
.define_fields = syscall_exit_define_fields, \
.regfunc = reg_event_syscall_exit, \
diff --git a/include/trace/ftrace.h b/include/trace/ftrace.h
index c4eca38..6055b06 100644
--- a/include/trace/ftrace.h
+++ b/include/trace/ftrace.h
@@ -623,23 +623,12 @@ static void ftrace_profile_disable_##name(struct ftrace_event_call *unused)\
* .trace = ftrace_raw_output_<call>, <-- stage 2
* };
*
- * static int ftrace_raw_init_event_<call>(struct ftrace_event_call *unused)
- * {
- * int id;
- *
- * id = register_ftrace_event(&ftrace_event_type_<call>);
- * if (!id)
- * return -ENODEV;
- * event_<call>.id = id;
- * return 0;
- * }
- *
* static struct ftrace_event_call __used
* __attribute__((__aligned__(4)))
* __attribute__((section("_ftrace_events"))) event_<call> = {
* .name = "<call>",
* .system = "<system>",
- * .raw_init = ftrace_raw_init_event_<call>,
+ * .raw_init = trace_event_raw_init,
* .regfunc = ftrace_reg_event_<call>,
* .unregfunc = ftrace_unreg_event_<call>,
* .show_format = ftrace_format_<call>,
@@ -647,9 +636,6 @@ static void ftrace_profile_disable_##name(struct ftrace_event_call *unused)\
*
*/
-#undef TP_FMT
-#define TP_FMT(fmt, args...) fmt "\n", ##args
-
#ifdef CONFIG_EVENT_PROFILE
#define _TRACE_PROFILE_INIT(call) \
@@ -744,19 +730,7 @@ static void ftrace_raw_unreg_event_##call(struct ftrace_event_call *unused)\
\
static struct trace_event ftrace_event_type_##call = { \
.trace = ftrace_raw_output_##call, \
-}; \
- \
-static int ftrace_raw_init_event_##call(struct ftrace_event_call *unused)\
-{ \
- int id; \
- \
- id = register_ftrace_event(&ftrace_event_type_##call); \
- if (!id) \
- return -ENODEV; \
- event_##call.id = id; \
- INIT_LIST_HEAD(&event_##call.fields); \
- return 0; \
-}
+};
#undef DEFINE_EVENT_PRINT
#define DEFINE_EVENT_PRINT(template, name, proto, args, print) \
@@ -776,7 +750,7 @@ __attribute__((section("_ftrace_events"))) event_##call = { \
.name = #call, \
.system = __stringify(TRACE_SYSTEM), \
.event = &ftrace_event_type_##call, \
- .raw_init = ftrace_raw_init_event_##call, \
+ .raw_init = trace_event_raw_init, \
.regfunc = ftrace_raw_reg_event_##call, \
.unregfunc = ftrace_raw_unreg_event_##call, \
.show_format = ftrace_format_##template, \
@@ -793,7 +767,7 @@ __attribute__((section("_ftrace_events"))) event_##call = { \
.name = #call, \
.system = __stringify(TRACE_SYSTEM), \
.event = &ftrace_event_type_##call, \
- .raw_init = ftrace_raw_init_event_##call, \
+ .raw_init = trace_event_raw_init, \
.regfunc = ftrace_raw_reg_event_##call, \
.unregfunc = ftrace_raw_unreg_event_##call, \
.show_format = ftrace_format_##call, \
@@ -953,7 +927,6 @@ end: \
perf_swevent_put_recursion_context(rctx); \
end_recursion: \
local_irq_restore(irq_flags); \
- \
}
#undef DEFINE_EVENT
diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 1d18315..8ed66e0 100644
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -105,6 +105,20 @@ void trace_destroy_fields(struct ftrace_event_call *call)
}
}
+int trace_event_raw_init(struct ftrace_event_call *call)
+{
+ int id;
+
+ id = register_ftrace_event(call->event);
+ if (!id)
+ return -ENODEV;
+ call->id = id;
+ INIT_LIST_HEAD(&call->fields);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(trace_event_raw_init);
+
static void ftrace_event_enable_disable(struct ftrace_event_call *call,
int enable)
{
--
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