drivers/sensors/Makefile has a type which prevents the adm9240.o module to be built The line in the Makefile is: obj-$(CONFIG_SENSORS_ADM9024) += adm9024.o should be : obj-$(CONFIG_SENSORS_ADM9420) += adm9420.o
Thanks for the report. Will be fixed in the next kernel build (2.4.1-0.1.15 or later)