Hi, the patch "sched-sibling-map-to-cpumask.patch" inroduced following compile error on UP machines: CC [M] arch/i386/kernel/cpu/cpufreq/p4-clockmod.o arch/i386/kernel/cpu/cpufreq/p4-clockmod.c: In function `cpufreq_p4_setdc': arch/i386/kernel/cpu/cpufreq/p4-clockmod.c:71: error: `cpu_sibling_map' undeclared (first use in this function) arch/i386/kernel/cpu/cpufreq/p4-clockmod.c:71: error: (Each undeclared identifier is reported only once arch/i386/kernel/cpu/cpufreq/p4-clockmod.c:71: error: for each function it appears in.) The attached patch fixes it... Thomas Schlichter