Merge tag 'trace-3.19-2' of git://git.kernel.org/pub/scm/linux/kernel/git/rostedt...

[cascardo/linux.git] / kernel / trace / trace_events.c

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index d0e4f92..366a78a 100644 (file)
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -212,8 +212,40 @@ void *ftrace_event_buffer_reserve(struct ftrace_event_buffer *fbuffer,
 }
 EXPORT_SYMBOL_GPL(ftrace_event_buffer_reserve);
 
+static DEFINE_SPINLOCK(tracepoint_iter_lock);
+
+static void output_printk(struct ftrace_event_buffer *fbuffer)
+{
+       struct ftrace_event_call *event_call;
+       struct trace_event *event;
+       unsigned long flags;
+       struct trace_iterator *iter = tracepoint_print_iter;
+
+       if (!iter)
+               return;
+
+       event_call = fbuffer->ftrace_file->event_call;
+       if (!event_call || !event_call->event.funcs ||
+           !event_call->event.funcs->trace)
+               return;
+
+       event = &fbuffer->ftrace_file->event_call->event;
+
+       spin_lock_irqsave(&tracepoint_iter_lock, flags);
+       trace_seq_init(&iter->seq);
+       iter->ent = fbuffer->entry;
+       event_call->event.funcs->trace(iter, 0, event);
+       trace_seq_putc(&iter->seq, 0);
+       printk("%s", iter->seq.buffer);
+
+       spin_unlock_irqrestore(&tracepoint_iter_lock, flags);
+}
+
 void ftrace_event_buffer_commit(struct ftrace_event_buffer *fbuffer)
 {
+       if (tracepoint_printk)
+               output_printk(fbuffer);
+
        event_trigger_unlock_commit(fbuffer->ftrace_file, fbuffer->buffer,
                                    fbuffer->event, fbuffer->entry,
                                    fbuffer->flags, fbuffer->pc);
@@ -2480,8 +2512,14 @@ static __init int event_trace_init(void)
 #endif
        return 0;
 }
-early_initcall(event_trace_memsetup);
-core_initcall(event_trace_enable);
+
+void __init trace_event_init(void)
+{
+       event_trace_memsetup();
+       init_ftrace_syscalls();
+       event_trace_enable();
+}
+
 fs_initcall(event_trace_init);
 
 #ifdef CONFIG_FTRACE_STARTUP_TEST