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Sparse complains that function_trace_op is not static but is not declared in a header file. It is used only in assembly code. But add it to a header so that sparse no longer complains: kernel/trace/ftrace.c:99:19: warning: symbol 'function_trace_op' was not declared. Should it be static? Link: https://lore.kernel.org/linux-trace-kernel/20240605202708.289105647@goodmis.org Cc: Mark Rutland <mark.rutland@arm.com> Cc: Mathieu Desnoyers <mathieu.desnoyers@efficios.com> Cc: Andrew Morton <akpm@linux-foundation.org> Acked-by: Masami Hiramatsu (Google) <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (Google) <rostedt@goodmis.org>