Hi, using 2.6.24.3-rt3 for ARM gives me this error. [...] CHK include/linux/compile.h CC arch/arm/kernel/process.o arch/arm/kernel/process.c: In function 'cpu_idle': arch/arm/kernel/process.c:175: error: implicit declaration of function 'trace_preempt_exit_idle' arch/arm/kernel/process.c:180: error: implicit declaration of function 'trace_preempt_enter_idle' make[2]: *** [arch/arm/kernel/process.o] Error 1 make[1]: *** [arch/arm/kernel] Error 2 I didn't find any implementation of these functions in the kernel. Do we need them or can I remove them? Juergen -- Dipl.-Ing. Juergen Beisert | http://www.pengutronix.de Pengutronix - Linux Solutions for Science and Industry Handelsregister: Amtsgericht Hildesheim, HRA 2686 Vertretung Sued/Muenchen, Germany Phone: +49-8766-939 228 | Fax: +49-5121-206917-9 -- To unsubscribe from this list: send the line "unsubscribe linux-rt-users" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html