5 files changed, 51 insertions, 3 deletions

diff --git a/arch/i386/kernel/cpu/proc.c b/arch/i386/kernel/cpu/proc.c
index e7921315ae9d..6d91b274589c 100644
--- a/arch/i386/kernel/cpu/proc.c
+++ b/arch/i386/kernel/cpu/proc.c
@@ -3,6 +3,7 @@
 #include <linux/string.h>
 #include <asm/semaphore.h>
 #include <linux/seq_file.h>
+#include <linux/cpufreq.h>
 
 /*
  *      Get CPU information for use by the procfs.
@@ -86,8 +87,11 @@ static int show_cpuinfo(struct seq_file *m, void *v)
                 seq_printf(m, "stepping\t: unknown\n");
 
         if ( cpu_has(c, X86_FEATURE_TSC) ) {
+                unsigned int freq = cpufreq_quick_get(n);
+                if (!freq)
+                        freq = cpu_khz;
                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
-                        cpu_khz / 1000, (cpu_khz % 1000));
+                        freq / 1000, (freq % 1000));
         }
 
         /* Cache size */
diff --git a/arch/ia64/kernel/setup.c b/arch/ia64/kernel/setup.c
index 5add0bcf87a7..088e5dded8dc 100644
--- a/arch/ia64/kernel/setup.c
+++ b/arch/ia64/kernel/setup.c
@@ -43,6 +43,7 @@
 #include <linux/initrd.h>
 #include <linux/platform.h>
 #include <linux/pm.h>
+#include <linux/cpufreq.h>
 
 #include <asm/ia32.h>
 #include <asm/machvec.h>
@@ -517,6 +518,7 @@ show_cpuinfo (struct seq_file *m, void *v)
         char family[32], features[128], *cp, sep;
         struct cpuinfo_ia64 *c = v;
         unsigned long mask;
+        unsigned int proc_freq;
         int i;
 
         mask = c->features;
@@ -549,6 +551,10 @@ show_cpuinfo (struct seq_file *m, void *v)
                 sprintf(cp, " 0x%lx", mask);
         }
 
+        proc_freq = cpufreq_quick_get(cpunum);
+        if (!proc_freq)
+                proc_freq = c->proc_freq / 1000;
+
         seq_printf(m,
                    "processor  : %d\n"
                    "vendor     : %s\n"
@@ -565,7 +571,7 @@ show_cpuinfo (struct seq_file *m, void *v)
                    "BogoMIPS   : %lu.%02lu\n",
                    cpunum, c->vendor, family, c->model, c->revision, c->archrev,
                    features, c->ppn, c->number,
-                   c->proc_freq / 1000000, c->proc_freq % 1000000,
+                   proc_freq / 1000, proc_freq % 1000,
                    c->itc_freq / 1000000, c->itc_freq % 1000000,
                    lpj*HZ/500000, (lpj*HZ/5000) % 100);
 #ifdef CONFIG_SMP
diff --git a/arch/x86_64/kernel/setup.c b/arch/x86_64/kernel/setup.c
index 750e01dcbdf4..64c4534b930c 100644
--- a/arch/x86_64/kernel/setup.c
+++ b/arch/x86_64/kernel/setup.c
@@ -42,6 +42,7 @@
 #include <linux/edd.h>
 #include <linux/mmzone.h>
 #include <linux/kexec.h>
+#include <linux/cpufreq.h>
 
 #include <asm/mtrr.h>
 #include <asm/uaccess.h>
@@ -1256,8 +1257,11 @@ static int show_cpuinfo(struct seq_file *m, void *v)
                 seq_printf(m, "stepping\t: unknown\n");
         
         if (cpu_has(c,X86_FEATURE_TSC)) {
+                unsigned int freq = cpufreq_quick_get((unsigned)(c-cpu_data));
+                if (!freq)
+                        freq = cpu_khz;
                 seq_printf(m, "cpu MHz\t\t: %u.%03u\n",
-                             cpu_khz / 1000, (cpu_khz % 1000));
+                             freq / 1000, (freq % 1000));
         }
 
         /* Cache size */
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 815902c2c856..a9163d02983a 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -823,6 +823,30 @@ static void cpufreq_out_of_sync(unsigned int cpu, unsigned int old_freq, unsigne
 
 
 /** 
+ * cpufreq_quick_get - get the CPU frequency (in kHz) frpm policy->cur
+ * @cpu: CPU number
+ *
+ * This is the last known freq, without actually getting it from the driver.
+ * Return value will be same as what is shown in scaling_cur_freq in sysfs.
+ */
+unsigned int cpufreq_quick_get(unsigned int cpu)
+{
+        struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
+        unsigned int ret = 0;
+
+        if (policy) {
+                down(&policy->lock);
+                ret = policy->cur;
+                up(&policy->lock);
+                cpufreq_cpu_put(policy);
+        }
+
+        return (ret);
+}
+EXPORT_SYMBOL(cpufreq_quick_get);
+
+
+/** 
  * cpufreq_get - get the current CPU frequency (in kHz)
  * @cpu: CPU number
  *
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index d068176b7ad7..c31650df9241 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -256,6 +256,16 @@ int cpufreq_update_policy(unsigned int cpu);
 /* query the current CPU frequency (in kHz). If zero, cpufreq couldn't detect it */
 unsigned int cpufreq_get(unsigned int cpu);
 
+/* query the last known CPU freq (in kHz). If zero, cpufreq couldn't detect it */
+#ifdef CONFIG_CPU_FREQ
+unsigned int cpufreq_quick_get(unsigned int cpu);
+#else
+static inline unsigned int cpufreq_quick_get(unsigned int cpu)
+{
+        return 0;
+}
+#endif
+
 
 /*********************************************************************
  *                       CPUFREQ DEFAULT GOVERNOR                    *