linux-kernel - [PATCH 2/6] ftrace: Assign ftrace_list_end to ftrace_ops

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Message-ID: <20240605202708.450784356@goodmis.org>
Date: Wed, 05 Jun 2024 16:26:46 -0400
From: Steven Rostedt <rostedt@...dmis.org>
To: linux-kernel@...r.kernel.org,
 linux-trace-kernel@...r.kernel.org
Cc: Masami Hiramatsu <mhiramat@...nel.org>,
 Mark Rutland <mark.rutland@....com>,
 Mathieu Desnoyers <mathieu.desnoyers@...icios.com>,
 Andrew Morton <akpm@...ux-foundation.org>
Subject: [PATCH 2/6] ftrace: Assign ftrace_list_end to ftrace_ops_list type cast to RCU

From: "Steven Rostedt (Google)" <rostedt@...dmis.org>

Use a type cast to convert ftrace_list_end to RCU when assigning
ftrace_ops_list. This will quiet the sparse warning:

 kernel/trace/ftrace.c:125:59: warning: incorrect type in initializer (different address spaces)
 kernel/trace/ftrace.c:125:59:    expected struct ftrace_ops [noderef] __rcu *[addressable] [toplevel] ftrace_ops_list
 kernel/trace/ftrace.c:125:59:    got struct ftrace_ops *

Signed-off-by: Steven Rostedt (Google) <rostedt@...dmis.org>
---
 kernel/trace/ftrace.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/kernel/trace/ftrace.c b/kernel/trace/ftrace.c
index da7e6abf48b4..3af0b1feb873 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -122,7 +122,7 @@ static int ftrace_disabled __read_mostly;
 
 DEFINE_MUTEX(ftrace_lock);
 
-struct ftrace_ops __rcu *ftrace_ops_list __read_mostly = &ftrace_list_end;
+struct ftrace_ops __rcu *ftrace_ops_list __read_mostly = (struct ftrace_ops __rcu *)&ftrace_list_end;
 ftrace_func_t ftrace_trace_function __read_mostly = ftrace_stub;
 struct ftrace_ops global_ops;
 
-- 
2.43.0