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Now that the driver core can properly handle constant struct bus_type, move the rpmsg_bus variable to be a constant structure as well, placing it into read-only memory which can not be modified at runtime. Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Suggested-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Ricardo B. Marliere <ricardo@marliere.net> Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Link: https://lore.kernel.org/r/20240204-bus_cleanup-rpmsg-v1-1-1703508c23b7@marliere.net Signed-off-by: Mathieu Poirier <mathieu.poirier@linaro.org>