Merge branch 'fix/hda' into for-linus

[karo-tx-linux.git] / kernel / trace / trace_events.c

diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
index aa08be69a1b6c1fcc026359ece8613812ad1a492..e75276a49cf5cfa2fb968609602621fa8e5a5da3 100644 (file)
--- a/kernel/trace/trace_events.c
+++ b/kernel/trace/trace_events.c
@@ -300,10 +300,18 @@ t_next(struct seq_file *m, void *v, loff_t *pos)
 
 static void *t_start(struct seq_file *m, loff_t *pos)
 {
+       struct ftrace_event_call *call = NULL;
+       loff_t l;
+
        mutex_lock(&event_mutex);
-       if (*pos == 0)
-               m->private = ftrace_events.next;
-       return t_next(m, NULL, pos);
+
+       m->private = ftrace_events.next;
+       for (l = 0; l <= *pos; ) {
+               call = t_next(m, NULL, &l);
+               if (!call)
+                       break;
+       }
+       return call;
 }
 
 static void *
@@ -332,10 +340,18 @@ s_next(struct seq_file *m, void *v, loff_t *pos)
 
 static void *s_start(struct seq_file *m, loff_t *pos)
 {
+       struct ftrace_event_call *call = NULL;
+       loff_t l;
+
        mutex_lock(&event_mutex);
-       if (*pos == 0)
-               m->private = ftrace_events.next;
-       return s_next(m, NULL, pos);
+
+       m->private = ftrace_events.next;
+       for (l = 0; l <= *pos; ) {
+               call = s_next(m, NULL, &l);
+               if (!call)
+                       break;
+       }
+       return call;
 }
 
 static int t_show(struct seq_file *m, void *v)
@@ -360,7 +376,7 @@ ftrace_event_seq_open(struct inode *inode, struct file *file)
        const struct seq_operations *seq_ops;
 
        if ((file->f_mode & FMODE_WRITE) &&
-           !(file->f_flags & O_APPEND))
+           (file->f_flags & O_TRUNC))
                ftrace_clear_events();
 
        seq_ops = inode->i_private;
@@ -924,7 +940,7 @@ event_create_dir(struct ftrace_event_call *call, struct dentry *d_events,
                entry = trace_create_file("enable", 0644, call->dir, call,
                                          enable);
 
-       if (call->id)
+       if (call->id && call->profile_enable)
                entry = trace_create_file("id", 0444, call->dir, call,
                                          id);