[for-next][PATCH 10/15] ftrace: Assign RCU list variable with rcu_assign_ptr()
From: Steven Rostedt
Date: Thu Jun 06 2024 - 08:14:29 EST
From: "Steven Rostedt (Google)" <rostedt@xxxxxxxxxxx>
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 *
Link: https://lore.kernel.org/linux-trace-kernel/20240605202708.613471310@xxxxxxxxxxx
Cc: Mark Rutland <mark.rutland@xxxxxxx>
Cc: Mathieu Desnoyers <mathieu.desnoyers@xxxxxxxxxxxx>
Cc: Andrew Morton <akpm@xxxxxxxxxxxxxxxxxxxx>
Acked-by: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx>
Signed-off-by: Steven Rostedt (Google) <rostedt@xxxxxxxxxxx>
---
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 034242675e7b..4aeb1183ea9f 100644
--- a/kernel/trace/ftrace.c
+++ b/kernel/trace/ftrace.c
@@ -311,7 +311,7 @@ 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