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Now that the driver core can properly handle constant struct bus_type, move the spmi_bus_type 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> Link: https://lore.kernel.org/r/20240204-bus_cleanup-spmi-v1-1-ef7f278f1987@marliere.net Reviewed-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> Signed-off-by: Stephen Boyd <sboyd@kernel.org> Link: https://lore.kernel.org/r/20240507210809.3479953-2-sboyd@kernel.org Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>