Hello World for linux Kernel Module

02_better_hello/Makefile

@@ -0,0 +1,21 @@
+
+#This variable is used to specify all the object file
+#which will be loaded and compile as kernel module for
+#usage. And the compilation for obj file from .c file
+#is done automatically.
+
+obj-m += hello.o
+
+# M variable used here tells the "make" to look in
+# current path to build bootable kernel module from
+# .c files in specified current path.
+
+# modules: It is the target that is used to build the kernel
+# 			modules.
+# clean: It is used to clean the build targets, compile and 
+#			generated files which would be created.
+all:
+	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) modules
+
+clean:
+	make -C /lib/modules/$(shell uname -r)/build M=$(PWD) clean