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The optional and required hints in the tcp_congestion_ops are information for the user of this interface to signalize its importance when implementing these functions. However, cong_avoid comment incorrectly tells that it is required, in reality congestion control must provide one of either cong_avoid or cong_control. In addition, min_tso_segs has not had any comment optional/required hints. So mark it as optional since it is used only in BBR. Co-developed-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Neal Cardwell <ncardwell@google.com> Signed-off-by: Daniel Sedlak <daniel.sedlak@cdn77.com> Link: https://patch.msgid.link/20260105115533.1151442-1-daniel.sedlak@cdn77.com Signed-off-by: Jakub Kicinski <kuba@kernel.org>