+diff -Naur linux-2.6.27.45.org/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c linux-2.6.27.45/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
+--- linux-2.6.27.45.org/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c 2010-01-29 00:21:45.000000000 +0100
++++ linux-2.6.27.45/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c 2010-02-11 15:21:39.000000000 +0100
+@@ -160,6 +160,8 @@
+ switch (c->x86_model) {
+ case 0x0E: /* Core */
+ case 0x0F: /* Core Duo */
++ case 0x16: /* Celeron Core */
++ case 0x1c: /* Atom */
+ p4clockmod_driver.flags |= CPUFREQ_CONST_LOOPS;
+ return speedstep_get_processor_frequency(SPEEDSTEP_PROCESSOR_PCORE);
+ case 0x0D: /* Pentium M (Dothan) */