linux-kernel - [PATCH] ftrace: remove unused pointer ftrace_swapper

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Message-Id: <20180809125609.13142-1-colin.king@canonical.com>
Date:   Thu,  9 Aug 2018 13:56:09 +0100
From:   Colin King <colin.king@...onical.com>
To:     Steven Rostedt <rostedt@...dmis.org>,
        Ingo Molnar <mingo@...hat.com>
Cc:     kernel-janitors@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: [PATCH] ftrace: remove unused pointer ftrace_swapper_pid

From: Colin Ian King <colin.king@...onical.com>

Pointer ftrace_swapper_pid is defined but is never used hence it is
redundant and can be removed. The use of this variable was removed
in commit 345ddcc882d8 ("ftrace: Have set_ftrace_pid use the bitmap
like events do").

Cleans up clang warning:
warning: 'ftrace_swapper_pid' defined but not used [-Wunused-const-variable=]

Signed-off-by: Colin Ian King <colin.king@...onical.com>
---
 kernel/trace/ftrace.c | 2 --
 1 file changed, 2 deletions(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index caf9cbf35816..2cc008cfbd4f 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -1049,8 +1049,6 @@ static __init void ftrace_profile_tracefs(struct dentry *d_tracer)
 }
 #endif /* CONFIG_FUNCTION_PROFILER */
 
-static struct pid * const ftrace_swapper_pid = &init_struct_pid;
-
 #ifdef CONFIG_FUNCTION_GRAPH_TRACER
 static int ftrace_graph_active;
 #else
-- 
2.17.1