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tracing: Add ftrace event call parameter to its field descriptor handler

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Add the struct ftrace_event_call as a parameter of its show_format()
callback. This way we can use it from the syscall trace events to
retrieve the syscall name from the ftrace event call parameter and
describe its fields using the syscalls metadata.

Signed-off-by: Frederic Weisbecker <fweisbec@gmail.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>
Cc: Jason Baron <jbaron@redhat.com>
This commit is contained in:
Frederic Weisbecker 2009-08-11 17:42:52 +02:00
parent 0ac676fb50
commit e8f9f4d79a
4 changed files with 9 additions and 5 deletions
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2
kernel/trace/trace_events.c
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@ -576,7 +576,7 @@ event_format_read(struct file *filp, char __user *ubuf, size_t cnt,
trace_seq_printf(s, "format:\n");
trace_write_header(s);
r = call->show_format(s);
r = call->show_format(call, s);
if (!r) {
/*
* ug! The format output is bigger than a PAGE!!