'struct thermal_zone_device_ops' is not modified in this driver. Constifying this structure moves some data to a read-only section, so increases overall security, especially when the structure holds some function pointers. On a x86_64, with allmodconfig: Before: ====== text data bss dec hex filename 8567 2144 0 10711 29d7 drivers/thermal/imx91_thermal.o After: ===== text data bss dec hex filename 8695 2016 0 10711 29d7 drivers/thermal/imx91_thermal.o Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Signed-off-by: Daniel Lezcano <daniel.lezcano@kernel.org> Reviewed-by: Frank Li <Frank.Li@nxp.com> Link: https://patch.msgid.link/5cce9ea713edcf2aa3c0efd5d31e9d9fd9f40a88.1786220585.git.christophe.jaillet@wanadoo.fr