linux-kernel - [PATCH] tracing: Simplify conditional compilation code in tracing_set

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Message-Id: <20220602022404.508144-1-sunliming@kylinos.cn>
Date:   Thu,  2 Jun 2022 10:24:04 +0800
From:   sunliming <sunliming@...inos.cn>
To:     rostedt@...dmis.org, mingo@...nel.org
Cc:     linux-kernel@...r.kernel.org, sunliming@...inos.cn,
        kelulanainsley@...il.com
Subject: [PATCH] tracing: Simplify conditional compilation code in tracing_set_tracer()

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

Signed-off-by: sunliming <sunliming@...inos.cn>
---
 kernel/trace/trace.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index f400800bc910..dc959e339512 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -6430,9 +6430,7 @@ 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)
-- 
2.25.1