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'struct iio_map' are not modified in these drivers. Constifying this structure moves some data to a read-only section, so increase overall security. In order to do it, the prototype of iio_map_array_register() and devm_iio_map_array_register(), and a few structures that hold a "struct iio_map *" need to be adjusted. On a x86_64, with allmodconfig, as an example: Before: ====== text data bss dec hex filename 21086 760 0 21846 5556 drivers/iio/adc/axp20x_adc.o After: ===== text data bss dec hex filename 21470 360 0 21830 5546 drivers/iio/adc/axp20x_adc.o 33842 1697 384 35923 8c53 drivers/iio/addac/ad74413r.o -- Compile tested only Signed-off-by: Christophe JAILLET <christophe.jaillet@wanadoo.fr> Link: https://patch.msgid.link/5729dc3cc3892ecf0d8ea28c5f7307b34e27493e.1725729801.git.christophe.jaillet@wanadoo.fr Signed-off-by: Jonathan Cameron <Jonathan.Cameron@huawei.com>