fix build issue

driver/CMakeLists.txt

@@ -33,12 +33,11 @@ endif (KERNELHEADERS_DIR)
 
 mark_as_advanced(KERNELHEADERS_FOUND)
 
-#find_package(KernelHeaders REQUIRED)
 include_directories(${KERNELHEADERS_INCLUDE_DIRS})
 
 set(DRIVER_FILE pico_rng.ko)
 set(KBUILD_CMD $(MAKE) -C ${KERNELHEADERS_DIR} modules M=${CMAKE_CURRENT_BINARY_DIR} src=${CMAKE_CURRENT_SOURCE_DIR})
-#FILE(WRITE ${CMAKE_CURRENT_SOURCE_DIR}/Kbuild "obj-m := pico_rng.o")
+FILE(WRITE ${CMAKE_CURRENT_SOURCE_DIR}/Kbuild "obj-m := pico_rng.o")
 
 add_custom_command(OUTPUT ${DRIVER_FILE}
         COMMAND ${KBUILD_CMD}

driver/Kbuild

@@ -1 +1 @@
-obj-m := pico_rng.o
+obj-m := pico_rng.o

driver/pico_rng.c

@@ -1,6 +1,3 @@
-//TODO Split this file into multiple, there are a few things going on here that need organizaion: usb device, character device, and rng thread.
-//     Move past prototype and put some polish on it.
-
 #include <linux/module.h>
 #include <linux/kernel.h>
 #include <linux/init.h>