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mbox_send_message() sends a u32 bit message, not a pointer to a message. We only convert to a pointer type as a generic type. If we want to send a dummy message of 0, then simply send 0 (NULL). Signed-off-by: Andrew Davis <afd@ti.com> Link: https://lore.kernel.org/r/20240325165507.30323-1-afd@ti.com Signed-off-by: Nishanth Menon <nm@ti.com>