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The kernel-mode PPPoE relay feature and its two associated ioctls (PPPOEIOCSFWD and PPPOEIOCDFWD) are not used by any existing userspace PPPoE implementations. The most commonly-used package, RP-PPPoE [1], handles the relaying entirely in userspace. This legacy code has remained in the driver since its introduction in kernel 2.3.99-pre7 for over two decades, but has served no practical purpose. Remove the unused relay code. [1] https://dianne.skoll.ca/projects/rp-pppoe/ Signed-off-by: Qingfang Deng <dqfext@gmail.com> Acked-by: Arnd Bergmann <arnd@arndb.de> Reviewed-by: Guillaume Nault <gnault@redhat.com> Link: https://patch.msgid.link/20260224015053.42472-1-dqfext@gmail.com Signed-off-by: Paolo Abeni <pabeni@redhat.com>