1 files changed, 49 insertions, 8 deletions

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index 0cc51edde3a8..366a78a3e61e 100644
--- 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);
@@ -461,7 +493,7 @@ static void remove_event_file_dir(struct ftrace_event_file *file)
 
         if (dir) {
                 spin_lock(&dir->d_lock);        /* probably unneeded */
-                list_for_each_entry(child, &dir->d_subdirs, d_u.d_child) {
+                list_for_each_entry(child, &dir->d_subdirs, d_child) {
                         if (child->d_inode)     /* probably unneeded */
                                 child->d_inode->i_private = NULL;
                 }
@@ -918,7 +950,7 @@ static int f_show(struct seq_file *m, void *v)
         case FORMAT_HEADER:
                 seq_printf(m, "name: %s\n", ftrace_event_name(call));
                 seq_printf(m, "ID: %d\n", call->event.type);
-                seq_printf(m, "format:\n");
+                seq_puts(m, "format:\n");
                 return 0;
 
         case FORMAT_FIELD_SEPERATOR:
@@ -1044,7 +1076,8 @@ event_filter_read(struct file *filp, char __user *ubuf, size_t cnt,
         mutex_unlock(&event_mutex);
 
         if (file)
-                r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, s->len);
+                r = simple_read_from_buffer(ubuf, cnt, ppos,
+                                            s->buffer, trace_seq_used(s));
 
         kfree(s);
 
@@ -1210,7 +1243,8 @@ subsystem_filter_read(struct file *filp, char __user *ubuf, size_t cnt,
         trace_seq_init(s);
 
         print_subsystem_event_filter(system, s);
-        r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, s->len);
+        r = simple_read_from_buffer(ubuf, cnt, ppos,
+                                    s->buffer, trace_seq_used(s));
 
         kfree(s);
 
@@ -1265,7 +1299,8 @@ show_header(struct file *filp, char __user *ubuf, size_t cnt, loff_t *ppos)
         trace_seq_init(s);
 
         func(s);
-        r = simple_read_from_buffer(ubuf, cnt, ppos, s->buffer, s->len);
+        r = simple_read_from_buffer(ubuf, cnt, ppos,
+                                    s->buffer, trace_seq_used(s));
 
         kfree(s);
 
@@ -1988,7 +2023,7 @@ event_enable_print(struct seq_file *m, unsigned long ip,
                    ftrace_event_name(data->file->event_call));
 
         if (data->count == -1)
-                seq_printf(m, ":unlimited\n");
+                seq_puts(m, ":unlimited\n");
         else
                 seq_printf(m, ":count=%ld\n", data->count);
 
@@ -2477,8 +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