Upto this point I have tried Step1) gcc -Wall -DMODULE -D__KERNEL__ -DLINUX -c sample2.c Step2) added -I to gcc flag gcc -Wall -DMODULE -D__KERNEL -DLINUX -I /usr/src/linux-headers-2.6.28- 11/include/ -c sample2.c Step3) added one more -I with asm in path gcc -I /usr/src/linux-headers-2.6.28-11/arch/x86/include/asm/ -I /usr/src/linux-headers-2.6.28-11/include/ -c sample2.c Step4) added asm/x86/include in path gcc -I /usr/src/linux-headers-2.6.28-11/arch/x86/include/ -I /usr/src/linux-headers-2.6.28-11/include/ -c sample2.c Step5) added linux in -I of second argument gcc -I /usr/src/linux-headers-2.6.28-11/arch/x86/include/asm/ -I /usr/src/linux-headers-2.6.28-11/include/linux/ -c sample2.c Step6) removed asm from first argument and linux from second gcc -I /usr/src/linux-headers-2.6.28-11/arch/x86/include/ -I /usr/src/linux-headers-2.6.28-11/include/ -c sample2.c Any more guesses as what is it failing? This is the link http://techblog.aasisvinayak.com/a-voyage-to-kernel-first-24-parts/ where author has shared his programs. These are working programs which have failed on my hardware. -- To unsubscribe from this list: send an email with "unsubscribe kernelnewbies" to ecartis@xxxxxxxxxxxx Please read the FAQ at http://kernelnewbies.org/FAQ