add character driver fops struct + implementation

1 files changed, 4 insertions, 1 deletions

diff --git a/1/Makefile b/1/Makefile
index a345845..d968e31 100644
--- a/1/Makefile
+++ b/1/Makefile
@@ -3,8 +3,11 @@ KERNEL := /lib/modules/$(RELEASE)/build
 # PWD doesn't have to be defined as it's inherited from the current environment
 # MAKE shouldn't be defined as it's special in GNU make
 
+# the names of these variables are required by the kernel's (imo weird) build
+# system, see [kbuild-obj-var] and [kbuild-module-makefile] in ../readme.md
 obj-m += lork.o
-lork-y := main.o
+lork-y += main.o
+lork-y += fopdrv.o
 
 all:
 	$(MAKE) -C $(KERNEL) M=$(PWD) modules