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'top_waiter' is assigned unconditionally before first use, so it does not need an initialization. [ mingo: Created legible changelog. ] Signed-off-by: Li zeming <zeming@nfschina.com> Signed-off-by: Ingo Molnar <mingo@kernel.org> Link: https://lore.kernel.org/r/20230725195047.3106-1-zeming@nfschina.com