2 files changed, 14 insertions, 3 deletions

diff --git a/arch/x86/kernel/cpu/cpufreq/longrun.c b/arch/x86/kernel/cpu/cpufreq/longrun.c
index af4a867a097c..777a7ff075de 100644
--- a/arch/x86/kernel/cpu/cpufreq/longrun.c
+++ b/arch/x86/kernel/cpu/cpufreq/longrun.c
@@ -245,7 +245,7 @@ static unsigned int __init longrun_determine_freqs(unsigned int *low_freq,
         if ((ecx > 95) || (ecx == 0) || (eax < ebx))
                 return -EIO;
 
-        edx = (eax - ebx) / (100 - ecx);
+        edx = ((eax - ebx) * 100) / (100 - ecx);
         *low_freq = edx * 1000; /* back to kHz */
 
         dprintk("low frequency is %u kHz\n", *low_freq);
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 46d4034d9f37..206791eb46e3 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -1127,12 +1127,23 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
                  * an UP version, and is deprecated by AMD.
                  */
                 if (num_online_cpus() != 1) {
-                        printk(KERN_ERR PFX "MP systems not supported by PSB BIOS structure\n");
+#ifndef CONFIG_ACPI_PROCESSOR
+                        printk(KERN_ERR PFX "ACPI Processor support is required "
+                               "for SMP systems but is absent. Please load the "
+                               "ACPI Processor module before starting this "
+                               "driver.\n");
+#else
+                        printk(KERN_ERR PFX "Your BIOS does not provide ACPI "
+                               "_PSS objects in a way that Linux understands. "
+                               "Please report this to the Linux ACPI maintainers"
+                               " and complain to your BIOS vendor.\n");
+#endif
                         kfree(data);
                         return -ENODEV;
                 }
                 if (pol->cpu != 0) {
-                        printk(KERN_ERR PFX "No _PSS objects for CPU other than CPU0\n");
+                        printk(KERN_ERR PFX "No ACPI _PSS objects for CPU other than "
+                               "CPU0. Complain to your BIOS vendor.\n");
                         kfree(data);
                         return -ENODEV;
                 }