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Message-ID: <20240605202708.613471310@goodmis.org>
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Date: Wed, 05 Jun 2024 16:26:47 -0400
From: Steven Rostedt <rostedt@goodmis.org>
To: linux-kernel@vger.kernel.org,
 linux-trace-kernel@vger.kernel.org
Cc: Masami Hiramatsu <mhiramat@kernel.org>,
 Mark Rutland <mark.rutland@arm.com>,
 Mathieu Desnoyers <mathieu.desnoyers@efficios.com>,
 Andrew Morton <akpm@linux-foundation.org>
Subject: [PATCH 3/6] ftrace: Assign RCU list variable with rcu_assign_ptr()
References: <20240605202644.293295925@goodmis.org>
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From: "Steven Rostedt (Google)" <rostedt@goodmis.org>

Use rcu_assign_ptr() to assign the list pointer as it is marked as RCU,
and this quiets the sparse warning:

   kernel/trace/ftrace.c:313:23: warning: incorrect type in assignment (different address spaces)
   kernel/trace/ftrace.c:313:23:    expected struct ftrace_ops [noderef] __rcu *
   kernel/trace/ftrace.c:313:23:    got struct ftrace_ops *

Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.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 3af0b1feb873..a39842a53444 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -310,7 +310,7 @@ static int remove_ftrace_ops(struct ftrace_ops __rcu **list,
 			lockdep_is_held(&ftrace_lock)) == ops &&
 	    rcu_dereference_protected(ops->next,
 			lockdep_is_held(&ftrace_lock)) == &ftrace_list_end) {
-		*list = &ftrace_list_end;
+		rcu_assign_pointer(*list, &ftrace_list_end);
 		return 0;
 	}
 
-- 
2.43.0