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tracing: Add ftrace_event_call void * 'data' field

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add an optional void * pointer to 'ftrace_event_call' that is
passed in for regfunc and unregfunc.

This prepares for syscall tracepoints creation by passing the name of
the syscall we want to trace and then retrieve its number through our
arch syscall table.

Signed-off-by: Jason Baron <jbaron@redhat.com>
Cc: Lai Jiangshan <laijs@cn.fujitsu.com>
Cc: Steven Rostedt <rostedt@goodmis.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Mathieu Desnoyers <mathieu.desnoyers@polymtl.ca>
Cc: Jiaying Zhang <jiayingz@google.com>
Cc: Martin Bligh <mbligh@google.com>
Cc: Li Zefan <lizf@cn.fujitsu.com>
Cc: Masami Hiramatsu <mhiramat@redhat.com>
Signed-off-by: Frederic Weisbecker <fweisbec@gmail.com>
This commit is contained in:
Jason Baron 2009-08-10 16:52:44 -04:00 committed by Frederic Weisbecker
parent f744bd576a
commit 69fd4f0eb2
3 changed files with 7 additions and 6 deletions
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5
include/linux/ftrace_event.h
View file

@ -112,8 +112,8 @@ struct ftrace_event_call {
struct dentry *dir;
struct trace_event *event;
int enabled;
int (*regfunc)(void);
void (*unregfunc)(void);
int (*regfunc)(void *);
void (*unregfunc)(void *);
int id;
int (*raw_init)(void);
int (*show_format)(struct trace_seq *s);
@ -122,6 +122,7 @@ struct ftrace_event_call {
int filter_active;
struct event_filter *filter;
void *mod;
void *data;
atomic_t profile_count;
int (*profile_enable)(struct ftrace_event_call *);

4
include/trace/ftrace.h
View file

@ -568,7 +568,7 @@ static void ftrace_raw_event_##call(proto) \
trace_nowake_buffer_unlock_commit(event, irq_flags, pc); \
} \
\
static int ftrace_raw_reg_event_##call(void) \
static int ftrace_raw_reg_event_##call(void *ptr) \
{ \
int ret; \
\
@ -579,7 +579,7 @@ static int ftrace_raw_reg_event_##call(void) \
return ret; \
} \
\
static void ftrace_raw_unreg_event_##call(void) \
static void ftrace_raw_unreg_event_##call(void *ptr) \
{ \
unregister_trace_##call(ftrace_raw_event_##call); \
} \

4
kernel/trace/trace_events.c
View file

@ -86,14 +86,14 @@ static void ftrace_event_enable_disable(struct ftrace_event_call *call,
if (call->enabled) {
call->enabled = 0;
tracing_stop_cmdline_record();
call->unregfunc();
call->unregfunc(call->data);
}
break;
case 1:
if (!call->enabled) {
call->enabled = 1;
tracing_start_cmdline_record();
call->regfunc();
call->regfunc(call->data);
}
break;
}