tracing: Simplify conditional compilation code in tracing_set_tracer()

[ Upstream commit f4b0d318097e45cbac5e14976f8bb56aa2cef504 ]

Two conditional compilation directives "#ifdef CONFIG_TRACER_MAX_TRACE"
are used consecutively, and no other code in between. Simplify conditional
the compilation code and only use one "#ifdef CONFIG_TRACER_MAX_TRACE".

Link: https://lkml.kernel.org/r/20220602140613.545069-1-sunliming@kylinos.cn
Signed-off-by: sunliming <sunliming@kylinos.cn>
Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>
Stable-dep-of: a541a9559bb0 ("tracing: Do not free snapshot if tracer is on cmdline")
Signed-off-by: Sasha Levin <sashal@kernel.org>

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 0dc17fd..2179577 100644 (file)
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -6416,9 +6416,7 @@ int tracing_set_tracer(struct trace_array *tr, const char *buf)
                synchronize_rcu();
                free_snapshot(tr);
        }
-#endif
 
-#ifdef CONFIG_TRACER_MAX_TRACE
        if (t->use_max_tr && !had_max_tr) {
                ret = tracing_alloc_snapshot_instance(tr);
                if (ret < 0)