Merge master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq

* master.kernel.org:/pub/scm/linux/kernel/git/davej/cpufreq:
  [CPUFREQ] Don't take semaphore in cpufreq_quick_get()
  [CPUFREQ] Support different families in fid/did to frequency conversion
  [CPUFREQ] cpufreq_stats: misc cpuinit section annotations
  [CPUFREQ] implement !CONFIG_CPU_FREQ stub for  cpufreq_unregister_notifier()
  [CPUFREQ] mark hotplug notifier callback as __cpuinit
  [CPUFREQ] Only check for transition latency on problematic governors (kconfig fix)
  [CPUFREQ] allow ondemand and conservative cpufreq governors to be used as default
  [CPUFREQ] move policy's governor initialisation out of low-level drivers into cpufreq core
  [CPUFREQ] Longhaul - Add support for PM133 northbridge
  [CPUFREQ] x86: use num_online_nodes to get physical cpus numbers for

31 files changed, 119 insertions, 86 deletions

diff --git a/arch/arm/mach-imx/cpufreq.c b/arch/arm/mach-imx/cpufreq.c
index 467d899fbe75..e548ba74a4d2 100644
--- a/arch/arm/mach-imx/cpufreq.c
+++ b/arch/arm/mach-imx/cpufreq.c
@@ -269,7 +269,6 @@ static int __init imx_cpufreq_driver_init(struct cpufreq_policy *policy)
                 return -EINVAL;
 
         policy->cur = policy->min = policy->max = imx_get_speed(0);
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.min_freq = 8000;
         policy->cpuinfo.max_freq = 200000;
          /* Manual states, that PLL stabilizes in two CLK32 periods */
diff --git a/arch/arm/mach-sa1100/cpu-sa1110.c b/arch/arm/mach-sa1100/cpu-sa1110.c
index 78f4c1346044..36b47ff5af11 100644
--- a/arch/arm/mach-sa1100/cpu-sa1110.c
+++ b/arch/arm/mach-sa1100/cpu-sa1110.c
@@ -331,7 +331,6 @@ static int __init sa1110_cpu_init(struct cpufreq_policy *policy)
         if (policy->cpu != 0)
                 return -EINVAL;
         policy->cur = policy->min = policy->max = sa11x0_getspeed(0);
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.min_freq = 59000;
         policy->cpuinfo.max_freq = 287000;
         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
diff --git a/arch/arm/plat-omap/cpu-omap.c b/arch/arm/plat-omap/cpu-omap.c
index a0c71dca2373..c0d63b0c61c9 100644
--- a/arch/arm/plat-omap/cpu-omap.c
+++ b/arch/arm/plat-omap/cpu-omap.c
@@ -108,7 +108,6 @@ static int __init omap_cpu_init(struct cpufreq_policy *policy)
         if (policy->cpu != 0)
                 return -EINVAL;
         policy->cur = policy->min = policy->max = omap_getspeed(0);
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.min_freq = clk_round_rate(mpu_clk, 0) / 1000;
         policy->cpuinfo.max_freq = clk_round_rate(mpu_clk, VERY_HI_RATE) / 1000;
         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
diff --git a/arch/blackfin/mach-bf533/cpu.c b/arch/blackfin/mach-bf533/cpu.c
index 6fd9cfd0a31b..b7a0e0fbd9af 100644
--- a/arch/blackfin/mach-bf533/cpu.c
+++ b/arch/blackfin/mach-bf533/cpu.c
@@ -118,8 +118,6 @@ static int __init __bf533_cpu_init(struct cpufreq_policy *policy)
         if (policy->cpu != 0)
                 return -EINVAL;
 
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
         /*Now ,only support one cpu */
         policy->cur = bf533_getfreq(0);
diff --git a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
index 8c6ec7070844..b8498ea62068 100644
--- a/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
+++ b/arch/ia64/kernel/cpufreq/acpi-cpufreq.c
@@ -321,8 +321,6 @@ acpi_cpufreq_cpu_init (
                             data->acpi_data.states[i].transition_latency * 1000;
                 }
         }
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
         policy->cur = processor_get_freq(data, policy->cpu);
 
         /* table init */
diff --git a/arch/powerpc/platforms/cell/cbe_cpufreq.c b/arch/powerpc/platforms/cell/cbe_cpufreq.c
index 901236fa0f07..5123e9d4164b 100644
--- a/arch/powerpc/platforms/cell/cbe_cpufreq.c
+++ b/arch/powerpc/platforms/cell/cbe_cpufreq.c
@@ -107,8 +107,6 @@ static int cbe_cpufreq_cpu_init(struct cpufreq_policy *policy)
                 pr_debug("%d: %d\n", i, cbe_freqs[i].frequency);
         }
 
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
         /* if DEBUG is enabled set_pmode() measures the latency
          * of a transition */
         policy->cpuinfo.transition_latency = 25000;
diff --git a/arch/powerpc/platforms/pasemi/cpufreq.c b/arch/powerpc/platforms/pasemi/cpufreq.c
index 3ae083851b01..1cfb8b0c8fec 100644
--- a/arch/powerpc/platforms/pasemi/cpufreq.c
+++ b/arch/powerpc/platforms/pasemi/cpufreq.c
@@ -195,8 +195,6 @@ static int pas_cpufreq_cpu_init(struct cpufreq_policy *policy)
                 pr_debug("%d: %d\n", i, pas_freqs[i].frequency);
         }
 
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
         policy->cpuinfo.transition_latency = get_gizmo_latency();
 
         cur_astate = get_cur_astate(policy->cpu);
diff --git a/arch/powerpc/platforms/powermac/cpufreq_32.c b/arch/powerpc/platforms/powermac/cpufreq_32.c
index 1fe35dab0e9e..c04abcc28a7a 100644
--- a/arch/powerpc/platforms/powermac/cpufreq_32.c
+++ b/arch/powerpc/platforms/powermac/cpufreq_32.c
@@ -410,7 +410,6 @@ static int pmac_cpufreq_cpu_init(struct cpufreq_policy *policy)
         if (policy->cpu != 0)
                 return -ENODEV;
 
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency      = CPUFREQ_ETERNAL;
         policy->cur = cur_freq;
 
diff --git a/arch/powerpc/platforms/powermac/cpufreq_64.c b/arch/powerpc/platforms/powermac/cpufreq_64.c
index 00f50298c342..4dfb4bc242b5 100644
--- a/arch/powerpc/platforms/powermac/cpufreq_64.c
+++ b/arch/powerpc/platforms/powermac/cpufreq_64.c
@@ -357,7 +357,6 @@ static unsigned int g5_cpufreq_get_speed(unsigned int cpu)
 
 static int g5_cpufreq_cpu_init(struct cpufreq_policy *policy)
 {
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
         policy->cur = g5_cpu_freqs[g5_query_freq()].frequency;
         /* secondary CPUs are tied to the primary one by the
diff --git a/arch/sh/kernel/cpufreq.c b/arch/sh/kernel/cpufreq.c
index e61890217c50..71d1c427b907 100644
--- a/arch/sh/kernel/cpufreq.c
+++ b/arch/sh/kernel/cpufreq.c
@@ -93,7 +93,6 @@ static int sh_cpufreq_cpu_init(struct cpufreq_policy *policy)
         policy->cpuinfo.max_freq = (clk_round_rate(cpuclk, ~0UL) + 500) / 1000;
         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
 
-        policy->governor        = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cur             = sh_cpufreq_get(policy->cpu);
         policy->min             = policy->cpuinfo.min_freq;
         policy->max             = policy->cpuinfo.max_freq;
diff --git a/arch/sparc64/kernel/us2e_cpufreq.c b/arch/sparc64/kernel/us2e_cpufreq.c
index 1f83fe6a82d6..791c15138f3a 100644
--- a/arch/sparc64/kernel/us2e_cpufreq.c
+++ b/arch/sparc64/kernel/us2e_cpufreq.c
@@ -326,7 +326,6 @@ static int __init us2e_freq_cpu_init(struct cpufreq_policy *policy)
         table[2].index = 5;
         table[3].frequency = CPUFREQ_TABLE_END;
 
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency = 0;
         policy->cur = clock_tick;
 
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index b6434a7ef8b2..ffd01e5dcb52 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -646,7 +646,6 @@ static int acpi_cpufreq_cpu_init(struct cpufreq_policy *policy)
                         policy->cpuinfo.transition_latency =
                             perf->states[i].transition_latency * 1000;
         }
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 
         data->max_freq = perf->states[0].core_frequency * 1000;
         /* table init */
diff --git a/arch/x86/kernel/cpu/cpufreq/cpufreq-nforce2.c b/arch/x86/kernel/cpu/cpufreq/cpufreq-nforce2.c
index 66acd5039918..32f0bda3fc95 100644
--- a/arch/x86/kernel/cpu/cpufreq/cpufreq-nforce2.c
+++ b/arch/x86/kernel/cpu/cpufreq/cpufreq-nforce2.c
@@ -363,7 +363,6 @@ static int nforce2_cpu_init(struct cpufreq_policy *policy)
         policy->cur = nforce2_get(policy->cpu);
         policy->min = policy->cpuinfo.min_freq;
         policy->max = policy->cpuinfo.max_freq;
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
 
         return 0;
 }
diff --git a/arch/x86/kernel/cpu/cpufreq/e_powersaver.c b/arch/x86/kernel/cpu/cpufreq/e_powersaver.c
index f43d98e11cc7..c11baaf9f2b4 100644
--- a/arch/x86/kernel/cpu/cpufreq/e_powersaver.c
+++ b/arch/x86/kernel/cpu/cpufreq/e_powersaver.c
@@ -253,7 +253,6 @@ static int eps_cpu_init(struct cpufreq_policy *policy)
                 f_table[k].frequency = CPUFREQ_TABLE_END;
         }
 
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency = 140000; /* 844mV -> 700mV in ns */
         policy->cur = fsb * current_multiplier;
 
diff --git a/arch/x86/kernel/cpu/cpufreq/elanfreq.c b/arch/x86/kernel/cpu/cpufreq/elanfreq.c
index f317276afa7a..1e7ae7dafcf6 100644
--- a/arch/x86/kernel/cpu/cpufreq/elanfreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/elanfreq.c
@@ -219,7 +219,6 @@ static int elanfreq_cpu_init(struct cpufreq_policy *policy)
         }
 
         /* cpuinfo and default policy values */
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
         policy->cur = elanfreq_get_cpu_frequency(0);
 
diff --git a/arch/x86/kernel/cpu/cpufreq/gx-suspmod.c b/arch/x86/kernel/cpu/cpufreq/gx-suspmod.c
index 461dabc4e495..ed2bda127c44 100644
--- a/arch/x86/kernel/cpu/cpufreq/gx-suspmod.c
+++ b/arch/x86/kernel/cpu/cpufreq/gx-suspmod.c
@@ -420,7 +420,6 @@ static int cpufreq_gx_cpu_init(struct cpufreq_policy *policy)
                 policy->min = maxfreq / POLICY_MIN_DIV;
         policy->max = maxfreq;
         policy->cur = curfreq;
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.min_freq = maxfreq / max_duration;
         policy->cpuinfo.max_freq = maxfreq;
         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
diff --git a/arch/x86/kernel/cpu/cpufreq/longhaul.c b/arch/x86/kernel/cpu/cpufreq/longhaul.c
index f0cce3c2dc3a..5045f5d583c8 100644
--- a/arch/x86/kernel/cpu/cpufreq/longhaul.c
+++ b/arch/x86/kernel/cpu/cpufreq/longhaul.c
@@ -710,6 +710,10 @@ static int enable_arbiter_disable(void)
         reg = 0x78;
         dev = pci_get_device(PCI_VENDOR_ID_VIA, PCI_DEVICE_ID_VIA_8601_0,
                              NULL);
+        /* Find PM133/VT8605 host bridge */
+        if (dev == NULL)
+                dev = pci_get_device(PCI_VENDOR_ID_VIA,
+                                     PCI_DEVICE_ID_VIA_8605_0, NULL);
         /* Find CLE266 host bridge */
         if (dev == NULL) {
                 reg = 0x76;
@@ -918,7 +922,6 @@ static int __init longhaul_cpu_init(struct cpufreq_policy *policy)
         if ((longhaul_version != TYPE_LONGHAUL_V1) && (scale_voltage != 0))
                 longhaul_setup_voltagescaling();
 
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency = 200000;    /* nsec */
         policy->cur = calc_speed(longhaul_get_cpu_mult());
 
diff --git a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
index 4c76b511e194..8eb414b906d2 100644
--- a/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
+++ b/arch/x86/kernel/cpu/cpufreq/p4-clockmod.c
@@ -229,7 +229,6 @@ static int cpufreq_p4_cpu_init(struct cpufreq_policy *policy)
         cpufreq_frequency_table_get_attr(p4clockmod_table, policy->cpu);
 
         /* cpuinfo and default policy values */
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency = 1000000; /* assumed */
         policy->cur = stock_freq;
 
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k6.c b/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
index f89524051e4a..6d0285339317 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k6.c
@@ -160,7 +160,6 @@ static int powernow_k6_cpu_init(struct cpufreq_policy *policy)
         }
 
         /* cpuinfo and default policy values */
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
         policy->cur = busfreq * max_multiplier;
 
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
index ca3e1d341889..7decd6a50ffa 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k7.c
@@ -637,8 +637,6 @@ static int __init powernow_cpu_init (struct cpufreq_policy *policy)
         printk (KERN_INFO PFX "Minimum speed %d MHz. Maximum speed %d MHz.\n",
                                 minimum_speed/1000, maximum_speed/1000);
 
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
-
         policy->cpuinfo.transition_latency = cpufreq_scale(2000000UL, fsb, latency);
 
         policy->cur = powernow_get(0);
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index 34ed53a06730..b273b69cfddf 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -76,7 +76,10 @@ static u32 find_khz_freq_from_fid(u32 fid)
 /* Return a frequency in MHz, given an input fid and did */
 static u32 find_freq_from_fiddid(u32 fid, u32 did)
 {
-        return 100 * (fid + 0x10) >> did;
+        if (current_cpu_data.x86 == 0x10)
+                return 100 * (fid + 0x10) >> did;
+        else
+                return 100 * (fid + 0x8) >> did;
 }
 
 static u32 find_khz_freq_from_fiddid(u32 fid, u32 did)
@@ -1208,7 +1211,6 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
         /* run on any CPU again */
         set_cpus_allowed(current, oldmask);
 
-        pol->governor = CPUFREQ_DEFAULT_GOVERNOR;
         if (cpu_family == CPU_HW_PSTATE)
                 pol->cpus = cpumask_of_cpu(pol->cpu);
         else
@@ -1325,21 +1327,16 @@ static struct cpufreq_driver cpufreq_amd64_driver = {
 static int __cpuinit powernowk8_init(void)
 {
         unsigned int i, supported_cpus = 0;
-        unsigned int booted_cores = 1;
 
         for_each_online_cpu(i) {
                 if (check_supported_cpu(i))
                         supported_cpus++;
         }
 
-#ifdef CONFIG_SMP
-        booted_cores = cpu_data[0].booted_cores;
-#endif
-
         if (supported_cpus == num_online_cpus()) {
                 printk(KERN_INFO PFX "Found %d %s "
                         "processors (%d cpu cores) (" VERSION ")\n",
-                        supported_cpus/booted_cores,
+                        num_online_nodes(),
                         boot_cpu_data.x86_model_id, supported_cpus);
                 return cpufreq_register_driver(&cpufreq_amd64_driver);
         }
diff --git a/arch/x86/kernel/cpu/cpufreq/sc520_freq.c b/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
index b8fb4b521c62..d9f3e90a7ae0 100644
--- a/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
+++ b/arch/x86/kernel/cpu/cpufreq/sc520_freq.c
@@ -111,7 +111,6 @@ static int sc520_freq_cpu_init(struct cpufreq_policy *policy)
                 return -ENODEV;
 
         /* cpuinfo and default policy values */
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency = 1000000; /* 1ms */
         policy->cur = sc520_freq_get_cpu_frequency(0);
 
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
index 6c5dc2c85aeb..811d47438546 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -393,7 +393,6 @@ static int centrino_cpu_init(struct cpufreq_policy *policy)
 
         freq = get_cur_freq(policy->cpu);
 
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency = 10000; /* 10uS transition latency */
         policy->cur = freq;
 
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
index a5b2346faf1f..36685e8f7be1 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
@@ -348,7 +348,6 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
                 (speed / 1000));
 
         /* cpuinfo and default policy values */
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cur = speed;
 
         result = cpufreq_frequency_table_cpuinfo(policy, speedstep_freqs);
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c b/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c
index e1c509aa3054..f2b5a621d27b 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-smi.c
@@ -290,7 +290,6 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
                 (speed / 1000));
 
         /* cpuinfo and default policy values */
-        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         policy->cpuinfo.transition_latency = CPUFREQ_ETERNAL;
         policy->cur = speed;
 
diff --git a/drivers/cpufreq/Kconfig b/drivers/cpufreq/Kconfig
index 993fa7b89253..721f86f4f008 100644
--- a/drivers/cpufreq/Kconfig
+++ b/drivers/cpufreq/Kconfig
@@ -56,10 +56,6 @@ config CPU_FREQ_STAT_DETAILS
 
           If in doubt, say N.
 
-# Note that it is not currently possible to set the other governors (such as ondemand)
-# as the default, since if they fail to initialise, cpufreq will be
-# left in an undefined state.
-
 choice
         prompt "Default CPUFreq governor"
         default CPU_FREQ_DEFAULT_GOV_USERSPACE if CPU_FREQ_SA1100 || CPU_FREQ_SA1110
@@ -85,6 +81,29 @@ config CPU_FREQ_DEFAULT_GOV_USERSPACE
           program shall be able to set the CPU dynamically without having
           to enable the userspace governor manually.
 
+config CPU_FREQ_DEFAULT_GOV_ONDEMAND
+        bool "ondemand"
+        select CPU_FREQ_GOV_ONDEMAND
+        select CPU_FREQ_GOV_PERFORMANCE
+        help
+          Use the CPUFreq governor 'ondemand' as default. This allows
+          you to get a full dynamic frequency capable system by simply
+          loading your cpufreq low-level hardware driver.
+          Be aware that not all cpufreq drivers support the ondemand
+          governor. If unsure have a look at the help section of the
+          driver. Fallback governor will be the performance governor.
+
+config CPU_FREQ_DEFAULT_GOV_CONSERVATIVE
+        bool "conservative"
+        select CPU_FREQ_GOV_CONSERVATIVE
+        select CPU_FREQ_GOV_PERFORMANCE
+        help
+          Use the CPUFreq governor 'conservative' as default. This allows
+          you to get a full dynamic frequency capable system by simply
+          loading your cpufreq low-level hardware driver.
+          Be aware that not all cpufreq drivers support the conservative
+          governor. If unsure have a look at the help section of the
+          driver. Fallback governor will be the performance governor.
 endchoice
 
 config CPU_FREQ_GOV_PERFORMANCE
diff --git a/drivers/cpufreq/cpufreq.c b/drivers/cpufreq/cpufreq.c
index 2f6a73c01b71..f7b9d6fce123 100644
--- a/drivers/cpufreq/cpufreq.c
+++ b/drivers/cpufreq/cpufreq.c
@@ -763,6 +763,8 @@ static int cpufreq_add_dev (struct sys_device * sys_dev)
         init_completion(&policy->kobj_unregister);
         INIT_WORK(&policy->update, handle_update);
 
+        /* Set governor before ->init, so that driver could check it */
+        policy->governor = CPUFREQ_DEFAULT_GOVERNOR;
         /* call driver. From then on the cpufreq must be able
          * to accept all calls to ->verify and ->setpolicy for this CPU
          */
@@ -1109,12 +1111,7 @@ unsigned int cpufreq_quick_get(unsigned int cpu)
         unsigned int ret_freq = 0;
 
         if (policy) {
-                if (unlikely(lock_policy_rwsem_read(cpu)))
-                        return ret_freq;
-
                 ret_freq = policy->cur;
-
-                unlock_policy_rwsem_read(cpu);
                 cpufreq_cpu_put(policy);
         }
 
@@ -1483,6 +1480,31 @@ static int __cpufreq_governor(struct cpufreq_policy *policy,
 {
         int ret;
 
+        /* Only must be defined when default governor is known to have latency
+           restrictions, like e.g. conservative or ondemand.
+           That this is the case is already ensured in Kconfig
+        */
+#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
+        struct cpufreq_governor *gov = &cpufreq_gov_performance;
+#else
+        struct cpufreq_governor *gov = NULL;
+#endif
+
+        if (policy->governor->max_transition_latency &&
+            policy->cpuinfo.transition_latency >
+            policy->governor->max_transition_latency) {
+                if (!gov)
+                        return -EINVAL;
+                else {
+                        printk(KERN_WARNING "%s governor failed, too long"
+                               " transition latency of HW, fallback"
+                               " to %s governor\n",
+                               policy->governor->name,
+                               gov->name);
+                        policy->governor = gov;
+                }
+        }
+
         if (!try_module_get(policy->governor->owner))
                 return -EINVAL;
 
@@ -1703,7 +1725,7 @@ int cpufreq_update_policy(unsigned int cpu)
 }
 EXPORT_SYMBOL(cpufreq_update_policy);
 
-static int cpufreq_cpu_callback(struct notifier_block *nfb,
+static int __cpuinit cpufreq_cpu_callback(struct notifier_block *nfb,
                                         unsigned long action, void *hcpu)
 {
         unsigned int cpu = (unsigned long)hcpu;
diff --git a/drivers/cpufreq/cpufreq_conservative.c b/drivers/cpufreq/cpufreq_conservative.c
index 26f440ccc3fb..4bd33ce8a6f3 100644
--- a/drivers/cpufreq/cpufreq_conservative.c
+++ b/drivers/cpufreq/cpufreq_conservative.c
@@ -58,7 +58,7 @@ static unsigned int 				def_sampling_rate;
 #define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER    (1000)
 #define DEF_SAMPLING_DOWN_FACTOR                (1)
 #define MAX_SAMPLING_DOWN_FACTOR                (10)
-#define TRANSITION_LATENCY_LIMIT                (10 * 1000)
+#define TRANSITION_LATENCY_LIMIT                (10 * 1000 * 1000)
 
 static void do_dbs_timer(struct work_struct *work);
 
@@ -466,9 +466,6 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
                     (!policy->cur))
                         return -EINVAL;
 
-                if (policy->cpuinfo.transition_latency >
-                                (TRANSITION_LATENCY_LIMIT * 1000))
-                        return -EINVAL;
                 if (this_dbs_info->enable) /* Already enabled */
                         break;
                  
@@ -551,15 +548,17 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
         return 0;
 }
 
-static struct cpufreq_governor cpufreq_gov_dbs = {
-        .name           = "conservative",
-        .governor       = cpufreq_governor_dbs,
-        .owner          = THIS_MODULE,
+struct cpufreq_governor cpufreq_gov_conservative = {
+        .name                   = "conservative",
+        .governor               = cpufreq_governor_dbs,
+        .max_transition_latency = TRANSITION_LATENCY_LIMIT,
+        .owner                  = THIS_MODULE,
 };
+EXPORT_SYMBOL(cpufreq_gov_conservative);
 
 static int __init cpufreq_gov_dbs_init(void)
 {
-        return cpufreq_register_governor(&cpufreq_gov_dbs);
+        return cpufreq_register_governor(&cpufreq_gov_conservative);
 }
 
 static void __exit cpufreq_gov_dbs_exit(void)
@@ -567,7 +566,7 @@ static void __exit cpufreq_gov_dbs_exit(void)
         /* Make sure that the scheduled work is indeed not running */
         flush_scheduled_work();
 
-        cpufreq_unregister_governor(&cpufreq_gov_dbs);
+        cpufreq_unregister_governor(&cpufreq_gov_conservative);
 }
 
 
diff --git a/drivers/cpufreq/cpufreq_ondemand.c b/drivers/cpufreq/cpufreq_ondemand.c
index e794527e4925..369f44595150 100644
--- a/drivers/cpufreq/cpufreq_ondemand.c
+++ b/drivers/cpufreq/cpufreq_ondemand.c
@@ -47,7 +47,7 @@ static unsigned int def_sampling_rate;
                         (def_sampling_rate / MIN_SAMPLING_RATE_RATIO)
 #define MAX_SAMPLING_RATE                       (500 * def_sampling_rate)
 #define DEF_SAMPLING_RATE_LATENCY_MULTIPLIER    (1000)
-#define TRANSITION_LATENCY_LIMIT                (10 * 1000)
+#define TRANSITION_LATENCY_LIMIT                (10 * 1000 * 1000)
 
 static void do_dbs_timer(struct work_struct *work);
 
@@ -508,12 +508,6 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
                 if ((!cpu_online(cpu)) || (!policy->cur))
                         return -EINVAL;
 
-                if (policy->cpuinfo.transition_latency >
-                                (TRANSITION_LATENCY_LIMIT * 1000)) {
-                        printk(KERN_WARNING "ondemand governor failed to load "
-                               "due to too long transition latency\n");
-                        return -EINVAL;
-                }
                 if (this_dbs_info->enable) /* Already enabled */
                         break;
 
@@ -585,11 +579,13 @@ static int cpufreq_governor_dbs(struct cpufreq_policy *policy,
         return 0;
 }
 
-static struct cpufreq_governor cpufreq_gov_dbs = {
-        .name = "ondemand",
-        .governor = cpufreq_governor_dbs,
-        .owner = THIS_MODULE,
+struct cpufreq_governor cpufreq_gov_ondemand = {
+        .name                   = "ondemand",
+        .governor               = cpufreq_governor_dbs,
+        .max_transition_latency = TRANSITION_LATENCY_LIMIT,
+        .owner                  = THIS_MODULE,
 };
+EXPORT_SYMBOL(cpufreq_gov_ondemand);
 
 static int __init cpufreq_gov_dbs_init(void)
 {
@@ -598,12 +594,12 @@ static int __init cpufreq_gov_dbs_init(void)
                 printk(KERN_ERR "Creation of kondemand failed\n");
                 return -EFAULT;
         }
-        return cpufreq_register_governor(&cpufreq_gov_dbs);
+        return cpufreq_register_governor(&cpufreq_gov_ondemand);
 }
 
 static void __exit cpufreq_gov_dbs_exit(void)
 {
-        cpufreq_unregister_governor(&cpufreq_gov_dbs);
+        cpufreq_unregister_governor(&cpufreq_gov_ondemand);
         destroy_workqueue(kondemand_wq);
 }
 
diff --git a/drivers/cpufreq/cpufreq_stats.c b/drivers/cpufreq/cpufreq_stats.c
index 917b9bab9ccb..8a45d0f93e26 100644
--- a/drivers/cpufreq/cpufreq_stats.c
+++ b/drivers/cpufreq/cpufreq_stats.c
@@ -164,8 +164,7 @@ freq_table_get_index(struct cpufreq_stats *stat, unsigned int freq)
         return -1;
 }
 
-static void
-cpufreq_stats_free_table (unsigned int cpu)
+static void __cpuexit cpufreq_stats_free_table(unsigned int cpu)
 {
         struct cpufreq_stats *stat = cpufreq_stats_table[cpu];
         struct cpufreq_policy *policy = cpufreq_cpu_get(cpu);
@@ -305,8 +304,9 @@ cpufreq_stat_notifier_trans (struct notifier_block *nb, unsigned long val,
         return 0;
 }
 
-static int cpufreq_stat_cpu_callback(struct notifier_block *nfb,
-                                        unsigned long action, void *hcpu)
+static int __cpuinit cpufreq_stat_cpu_callback(struct notifier_block *nfb,
+                                               unsigned long action,
+                                               void *hcpu)
 {
         unsigned int cpu = (unsigned long)hcpu;
 
@@ -323,7 +323,7 @@ static int cpufreq_stat_cpu_callback(struct notifier_block *nfb,
         return NOTIFY_OK;
 }
 
-static struct notifier_block cpufreq_stat_cpu_notifier =
+static struct notifier_block cpufreq_stat_cpu_notifier __cpuinitdata =
 {
         .notifier_call = cpufreq_stat_cpu_callback,
 };
@@ -356,8 +356,7 @@ __init cpufreq_stats_init(void)
 
         register_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
         for_each_online_cpu(cpu) {
-                cpufreq_stat_cpu_callback(&cpufreq_stat_cpu_notifier,
-                                CPU_ONLINE, (void *)(long)cpu);
+                cpufreq_update_policy(cpu);
         }
         return 0;
 }
@@ -372,13 +371,12 @@ __exit cpufreq_stats_exit(void)
                         CPUFREQ_TRANSITION_NOTIFIER);
         unregister_hotcpu_notifier(&cpufreq_stat_cpu_notifier);
         for_each_online_cpu(cpu) {
-                cpufreq_stat_cpu_callback(&cpufreq_stat_cpu_notifier,
-                                                CPU_DEAD, (void *)(long)cpu);
+                cpufreq_stats_free_table(cpu);
         }
 }
 
 MODULE_AUTHOR ("Zou Nan hai <nanhai.zou@intel.com>");
-MODULE_DESCRIPTION ("'cpufreq_stats' - A driver to export cpufreq stats"
+MODULE_DESCRIPTION ("'cpufreq_stats' - A driver to export cpufreq stats "
                                 "through sysfs filesystem");
 MODULE_LICENSE ("GPL");
 
diff --git a/include/linux/cpufreq.h b/include/linux/cpufreq.h
index 3ec6e7ff5fbd..23932d7741a9 100644
--- a/include/linux/cpufreq.h
+++ b/include/linux/cpufreq.h
@@ -32,12 +32,24 @@
  *                     CPUFREQ NOTIFIER INTERFACE                    *
  *********************************************************************/
 
-int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
-int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
-
 #define CPUFREQ_TRANSITION_NOTIFIER     (0)
 #define CPUFREQ_POLICY_NOTIFIER         (1)
 
+#ifdef CONFIG_CPU_FREQ
+int cpufreq_register_notifier(struct notifier_block *nb, unsigned int list);
+int cpufreq_unregister_notifier(struct notifier_block *nb, unsigned int list);
+#else           /* CONFIG_CPU_FREQ */
+static inline int cpufreq_register_notifier(struct notifier_block *nb,
+                                                unsigned int list)
+{
+        return 0;
+}
+static inline int cpufreq_unregister_notifier(struct notifier_block *nb,
+                                                unsigned int list)
+{
+        return 0;
+}
+#endif          /* CONFIG_CPU_FREQ */
 
 /* if (cpufreq_driver->target) exists, the ->governor decides what frequency
  * within the limits is used. If (cpufreq_driver->setpolicy> exists, these
@@ -155,6 +167,9 @@ struct cpufreq_governor {
         char    name[CPUFREQ_NAME_LEN];
         int     (*governor)     (struct cpufreq_policy *policy,
                                  unsigned int event);
+        unsigned int max_transition_latency; /* HW must be able to switch to
+                        next freq faster than this value in nano secs or we
+                        will fallback to performance governor */
         struct list_head        governor_list;
         struct module           *owner;
 };
@@ -279,12 +294,24 @@ static inline unsigned int cpufreq_quick_get(unsigned int cpu)
  *********************************************************************/
 
 
-#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+/*
+  Performance governor is fallback governor if any other gov failed to
+  auto load due latency restrictions
+*/
+#ifdef CONFIG_CPU_FREQ_GOV_PERFORMANCE
 extern struct cpufreq_governor cpufreq_gov_performance;
-#define CPUFREQ_DEFAULT_GOVERNOR        &cpufreq_gov_performance
+#endif
+#ifdef CONFIG_CPU_FREQ_DEFAULT_GOV_PERFORMANCE
+#define CPUFREQ_DEFAULT_GOVERNOR        (&cpufreq_gov_performance)
 #elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_USERSPACE)
 extern struct cpufreq_governor cpufreq_gov_userspace;
-#define CPUFREQ_DEFAULT_GOVERNOR        &cpufreq_gov_userspace
+#define CPUFREQ_DEFAULT_GOVERNOR        (&cpufreq_gov_userspace)
+#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_ONDEMAND)
+extern struct cpufreq_governor cpufreq_gov_ondemand;
+#define CPUFREQ_DEFAULT_GOVERNOR        (&cpufreq_gov_ondemand)
+#elif defined(CONFIG_CPU_FREQ_DEFAULT_GOV_CONSERVATIVE)
+extern struct cpufreq_governor cpufreq_gov_conservative;
+#define CPUFREQ_DEFAULT_GOVERNOR        (&cpufreq_gov_conservative)
 #endif