-obj-m += $(shell \
- if [ $(VERSION) -ge 4 \
- -o \( $(VERSION) -eq 3 -a $(PATCHLEVEL) -ge 2 \) ] ; then \
- echo "lttng-probe-regmap.o" ; fi;)
+regmap_dep_4_1 = $(srctree)/drivers/base/regmap/trace.h
+ifneq ($(wildcard $(regmap_dep_4_1)),)
+obj-m += lttng-probe-regmap.o
+else
+$(warning File $(regmap_dep_4_1) not found. Probe "regmap" is disabled. Need Linux 4.1+ kernel source tree to enable it.)
+endif