[for-linus][PATCH 04/13] tracing: Remove unused ret assignment in tracing_set_tracer()

[Steven Rostedt]

From: "Wayen.Yan" <win847@xxxxxxxxx>

In tracing_set_tracer(), the assignment 'ret = 0' following the
__tracing_resize_ring_buffer() error check is a dead store. After
this point, all subsequent code paths either return with a constant
value (-EINVAL, 0, -EBUSY) or reassign ret before reading it
(tracing_arm_snapshot_locked, tracer_init).

Remove the unnecessary assignment.

No functional change.

Link: https://patch.msgid.link/6a2a37c4.f0a9eb5a.2fc603.7724@xxxxxxxxxxxxx
Signed-off-by: Wayen.Yan <win847@xxxxxxxxx>
Signed-off-by: Steven Rostedt <rostedt@xxxxxxxxxxx>
---
 kernel/trace/trace.c | 1 -
 1 file changed, 1 deletion(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 1146b83b711a..299f5ab630b9 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -5015,7 +5015,6 @@ int tracing_set_tracer(struct trace_array *tr, const char *buf)
 						RING_BUFFER_ALL_CPUS);
 		if (ret < 0)
 			return ret;
-		ret = 0;
 	}
 
 	list_for_each_entry(t, &tr->tracers, list) {
-- 
2.53.0