ring-buffer: Remove unnecessary recusive call in rb_advance_iter()

The original ring-buffer code had special checks at the start
of rb_advance_iter() and instead of repeating them again at the
end of the function if a certain condition existed, I just did
a recursive call to rb_advance_iter() because the special condition
would cause rb_advance_iter() to return early (after the checks).

But as things have changed, the special checks no longer exist
and the only thing done for the special_condition is to call
rb_inc_iter() and return. Instead of doing a confusing recursive call,
just call rb_inc_iter instead.

Signed-off-by: Steven Rostedt <rostedt@goodmis.org>

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index ce8514f..6ff9cc4 100644 (file)
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -3425,7 +3425,7 @@ static void rb_advance_iter(struct ring_buffer_iter *iter)
        /* check for end of page padding */
        if ((iter->head >= rb_page_size(iter->head_page)) &&
            (iter->head_page != cpu_buffer->commit_page))
-               rb_advance_iter(iter);
+               rb_inc_iter(iter);
 }
 
 static int rb_lost_events(struct ring_buffer_per_cpu *cpu_buffer)