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    Subject[PATCH 3/7] tracing: add back the available_events file
    From: Steven Rostedt <srostedt@redhat.com>

    The event directory files type and available_types were no longer
    needed with the new TRACE_EVENT_FORMAT macros, they were deleted.
    But by accident the available_events file was also removed.
    This patch brings it back.

    Reported-by: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>
    Signed-off-by: Steven Rostedt <srostedt@redhat.com>
    ---
    kernel/trace/trace_events.c | 14 ++++++++++++++
    1 files changed, 14 insertions(+), 0 deletions(-)

    diff --git a/kernel/trace/trace_events.c b/kernel/trace/trace_events.c
    index 85ec10f..769dfd0 100644
    --- a/kernel/trace/trace_events.c
    +++ b/kernel/trace/trace_events.c
    @@ -428,6 +428,13 @@ static const struct seq_operations show_set_event_seq_ops = {
    .stop = t_stop,
    };

    +static const struct file_operations ftrace_avail_fops = {
    + .open = ftrace_event_seq_open,
    + .read = seq_read,
    + .llseek = seq_lseek,
    + .release = seq_release,
    +};
    +
    static const struct file_operations ftrace_set_event_fops = {
    .open = ftrace_event_seq_open,
    .read = seq_read,
    @@ -569,6 +576,13 @@ static __init int event_trace_init(void)
    if (!d_tracer)
    return 0;

    + entry = debugfs_create_file("available_events", 0444, d_tracer,
    + (void *)&show_event_seq_ops,
    + &ftrace_avail_fops);
    + if (!entry)
    + pr_warning("Could not create debugfs "
    + "'available_events' entry\n");
    +
    entry = debugfs_create_file("set_event", 0644, d_tracer,
    (void *)&show_set_event_seq_ops,
    &ftrace_set_event_fops);
    --
    1.6.1.3
    --


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