obj-$(CONFIG_LTTNG) += lttng-probe-sched.o
obj-$(CONFIG_LTTNG) += lttng-probe-irq.o
obj-$(CONFIG_LTTNG) += lttng-probe-timer.o
-obj-$(CONFIG_LTTNG) += lttng-probe-kmem.o
+
+# A dependency on internal header 'mm/slab.h' was introduced in v6.0
+kmem_dep = $(srctree)/mm/slab.h
+kmem_dep_wildcard = $(wildcard $(kmem_dep))
+kmem_dep_check = $(shell \
+if [ \( $(VERSION) -ge 7 \
+ -o \( $(VERSION) -eq 6 -a $(PATCHLEVEL) -ge 0 \) \) -a \
+ -z "$(kmem_dep_wildcard)" ] ; then \
+ echo "warn" ; \
+else \
+ echo "ok" ; \
+fi ;)
+ifeq ($(kmem_dep_check),ok)
+ obj-$(CONFIG_LTTNG) += lttng-probe-kmem.o
+else
+ $(warning File $(kmem_dep) not found. Probe "kmem" is disabled. Use full kernel source tree to enable it.)
+endif
+
obj-$(CONFIG_LTTNG) += lttng-probe-module.o
obj-$(CONFIG_LTTNG) += lttng-probe-power.o
obj-$(CONFIG_LTTNG) += lttng-probe-statedump.o