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It is not necessary to define the variable ret to receive the return value of the xbc_node_compose_key() method. Link: https://lkml.kernel.org/r/20210414134647.1870-1-zuoqilin1@163.com Acked-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: zuoqilin <zuoqilin@yulong.com> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>