[tip:perf/core] ring-buffer: Remove unnecessary recusive call in rb_advance_iter()

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Commit-ID:  771e03842a9e98a1c2013ca1ed8bb2793488f3e5
Gitweb:     http://git.kernel.org/tip/771e03842a9e98a1c2013ca1ed8bb2793488f3e5
Author:     Steven Rostedt <srostedt@xxxxxxxxxx>
AuthorDate: Fri, 30 Nov 2012 10:41:57 -0500
Committer:  Steven Rostedt <rostedt@xxxxxxxxxxx>
CommitDate: Mon, 21 Jan 2013 13:22:29 -0500

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@xxxxxxxxxxx>
---
 kernel/trace/ring_buffer.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index ce8514f..6ff9cc4 100644
--- 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)
--
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