Hi, When I tried to compile Linux-2.6.29-git6, I got this error message. My .config is also attached. My system is Jaunty Kubuntu 9.04 with latest updates as of today. If it is already reported before, please ignore it. Thanks, Tarkan Erimer make[1]: Entering directory `/usr/src/linux-2.6.29' CHK include/linux/version.h CHK include/linux/utsrelease.h SYMLINK include/asm -> include/asm-x86 CALL scripts/checksyscalls.sh CC [M] arch/x86/kernel/msr.o CC [M] arch/x86/kernel/cpuid.o CC [M] arch/x86/kernel/microcode_core.o CC [M] arch/x86/kernel/microcode_intel.o LD [M] arch/x86/kernel/microcode.o CC [M] arch/x86/kernel/cpu/cpufreq/speedstep-lib.o CC [M] arch/x86/kernel/cpu/cpufreq/p4-clockmod.o arch/x86/kernel/cpu/cpufreq/p4-clockmod.c: In function ‘cpufreq_p4_cpu_init’: arch/x86/kernel/cpu/cpufreq/p4-clockmod.c:232: error: implicit declaration of function ‘recalibrate_cpu_khz’ make[4]: *** [arch/x86/kernel/cpu/cpufreq/p4-clockmod.o] Error 1 make[3]: *** [arch/x86/kernel/cpu/cpufreq] Error 2 make[2]: *** [arch/x86/kernel/cpu] Error 2 make[1]: *** [arch/x86/kernel] Error 2 make[1]: Leaving directory `/usr/src/linux-2.6.29' make: *** [debian/stamp/build/kernel] Error 2