I have recently started with Device Drivers in Linux and have made a simple Hello world module. My code is this //--------------------------------------------------------- /* My first kernel Module */ #include <linux/init.h> #include <linux/module.h> static init my_init(void){ printk(KERN_ALERT "Hello World\n"); return 0; } static void my_exit(void){ printk(KERN_ALERT "asta la vista baby\n"); } MODULE_LICENSE("GPL"); module_init(my_init); module_exit(my_exit); //------------------------------------------------------------- and the makefile i am using is like this... //------------------------------------------------------------- all: make -C /home/arun/Linux_Source M=`pwd` clean: make -C /home/arun/Linux_Source M=`pwd` clean obj-m := Hello_World.o //--------------------------------------------------------------------- I receive the following error on running "$make" //--------------------------------------------------------- make -C /home/arun/Linux_Source M=`pwd` make[1]: Entering directory `/home/arun/Linux_Source' ERROR: Kernel configuration is invalid. include/generated/autoconf.h or include/config/auto.conf are missing. Run 'make oldconfig && make prepare' on kernel src to fix it. make[1]: *** No rule to make target `Device'. Stop. make[1]: Leaving directory `/home/arun/Linux_Source' make: *** [all] Error 2 //---------------------------------------------------------- PS: The kernel Source i am using is a Copy of my Git Repository and is a copy of the branch 3.10.25. my system details are: Linux linux-nwya.site 3.10.25-2.10-desktop #2 SMP PREEMPT Tue Jan 7 00:25:03 IST 2014 i686 i686 i386 GNU/Linux