make devices, buffers and triggers optional

Signed-off-by: federico.vaga@cern.ch <federico.vaga@cern.ch>

drivers/zio/Kbuild

@@ -9,9 +9,9 @@ CONFIG_ZIO_SNIFF_DEV:=y
 zio-$(CONFIG_ZIO_SNIFF_DEV) += sniff-dev.o
 
 obj-m = zio.o
-obj-m += devices/
-obj-m += buffers/
-obj-m += triggers/
+obj-$(CONFIG_ZIO_DEVICES) += devices/
+obj-$(CONFIG_ZIO_BUFFERS) += buffers/
+obj-$(CONFIG_ZIO_TRIGGERS) += triggers/
 
 # src is defined byt the kernel Makefile, but we want to use it also in our
 # local Makefile (tools, lib)

drivers/zio/Makefile

@@ -16,6 +16,14 @@ ZIO_VERSION += -D__ZIO_PATCH_VERSION=$(shell echo $(GIT_VERSION) | cut -d '-' -f
 export GIT_VERSION
 export ZIO_VERSION
 
+CONFIG_ZIO_DEVICES ?= m
+CONFIG_ZIO_BUFFERS ?= m
+CONFIG_ZIO_TRIGGERS ?= m
+
+export CONFIG_ZIO_DEVICES
+export CONFIG_ZIO_BUFFERS
+export CONFIG_ZIO_TRIGGERS
+
 all: modules
 
 modules coccicheck modules_install: