Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel

* 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/mingo/linux-2.6-sched-devel: (62 commits)
  sched: build fix
  sched: better rt-group documentation
  sched: features fix
  sched: /debug/sched_features
  sched: add SCHED_FEAT_DEADLINE
  sched: debug: show a weight tree
  sched: fair: weight calculations
  sched: fair-group: de-couple load-balancing from the rb-trees
  sched: fair-group scheduling vs latency
  sched: rt-group: optimize dequeue_rt_stack
  sched: debug: add some debug code to handle the full hierarchy
  sched: fair-group: SMP-nice for group scheduling
  sched, cpuset: customize sched domains, core
  sched, cpuset: customize sched domains, docs
  sched: prepatory code movement
  sched: rt: multi level group constraints
  sched: task_group hierarchy
  sched: fix the task_group hierarchy for UID grouping
  sched: allow the group scheduler to have multiple levels
  sched: mix tasks and groups
  ...

11 files changed, 169 insertions, 114 deletions

diff --git a/arch/x86/kernel/acpi/cstate.c b/arch/x86/kernel/acpi/cstate.c
index 9366fb68d8d8..c2502eb9aa83 100644
--- a/arch/x86/kernel/acpi/cstate.c
+++ b/arch/x86/kernel/acpi/cstate.c
@@ -91,7 +91,7 @@ int acpi_processor_ffh_cstate_probe(unsigned int cpu,
 
         /* Make sure we are running on right CPU */
         saved_mask = current->cpus_allowed;
-        retval = set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        retval = set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
         if (retval)
                 return -1;
 
@@ -128,7 +128,7 @@ int acpi_processor_ffh_cstate_probe(unsigned int cpu,
                  cx->address);
 
 out:
-        set_cpus_allowed(current, saved_mask);
+        set_cpus_allowed_ptr(current, &saved_mask);
         return retval;
 }
 EXPORT_SYMBOL_GPL(acpi_processor_ffh_cstate_probe);
diff --git a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
index a962dcb9c408..e2d870de837c 100644
--- a/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
+++ b/arch/x86/kernel/cpu/cpufreq/acpi-cpufreq.c
@@ -192,9 +192,9 @@ static void drv_read(struct drv_cmd *cmd)
         cpumask_t saved_mask = current->cpus_allowed;
         cmd->val = 0;
 
-        set_cpus_allowed(current, cmd->mask);
+        set_cpus_allowed_ptr(current, &cmd->mask);
         do_drv_read(cmd);
-        set_cpus_allowed(current, saved_mask);
+        set_cpus_allowed_ptr(current, &saved_mask);
 }
 
 static void drv_write(struct drv_cmd *cmd)
@@ -203,30 +203,30 @@ static void drv_write(struct drv_cmd *cmd)
         unsigned int i;
 
         for_each_cpu_mask(i, cmd->mask) {
-                set_cpus_allowed(current, cpumask_of_cpu(i));
+                set_cpus_allowed_ptr(current, &cpumask_of_cpu(i));
                 do_drv_write(cmd);
         }
 
-        set_cpus_allowed(current, saved_mask);
+        set_cpus_allowed_ptr(current, &saved_mask);
         return;
 }
 
-static u32 get_cur_val(cpumask_t mask)
+static u32 get_cur_val(const cpumask_t *mask)
 {
         struct acpi_processor_performance *perf;
         struct drv_cmd cmd;
 
-        if (unlikely(cpus_empty(mask)))
+        if (unlikely(cpus_empty(*mask)))
                 return 0;
 
-        switch (per_cpu(drv_data, first_cpu(mask))->cpu_feature) {
+        switch (per_cpu(drv_data, first_cpu(*mask))->cpu_feature) {
         case SYSTEM_INTEL_MSR_CAPABLE:
                 cmd.type = SYSTEM_INTEL_MSR_CAPABLE;
                 cmd.addr.msr.reg = MSR_IA32_PERF_STATUS;
                 break;
         case SYSTEM_IO_CAPABLE:
                 cmd.type = SYSTEM_IO_CAPABLE;
-                perf = per_cpu(drv_data, first_cpu(mask))->acpi_data;
+                perf = per_cpu(drv_data, first_cpu(*mask))->acpi_data;
                 cmd.addr.io.port = perf->control_register.address;
                 cmd.addr.io.bit_width = perf->control_register.bit_width;
                 break;
@@ -234,7 +234,7 @@ static u32 get_cur_val(cpumask_t mask)
                 return 0;
         }
 
-        cmd.mask = mask;
+        cmd.mask = *mask;
 
         drv_read(&cmd);
 
@@ -271,7 +271,7 @@ static unsigned int get_measured_perf(unsigned int cpu)
         unsigned int retval;
 
         saved_mask = current->cpus_allowed;
-        set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
         if (get_cpu() != cpu) {
                 /* We were not able to run on requested processor */
                 put_cpu();
@@ -329,7 +329,7 @@ static unsigned int get_measured_perf(unsigned int cpu)
         retval = per_cpu(drv_data, cpu)->max_freq * perf_percent / 100;
 
         put_cpu();
-        set_cpus_allowed(current, saved_mask);
+        set_cpus_allowed_ptr(current, &saved_mask);
 
         dprintk("cpu %d: performance percent %d\n", cpu, perf_percent);
         return retval;
@@ -347,13 +347,13 @@ static unsigned int get_cur_freq_on_cpu(unsigned int cpu)
                 return 0;
         }
 
-        freq = extract_freq(get_cur_val(cpumask_of_cpu(cpu)), data);
+        freq = extract_freq(get_cur_val(&cpumask_of_cpu(cpu)), data);
         dprintk("cur freq = %u\n", freq);
 
         return freq;
 }
 
-static unsigned int check_freqs(cpumask_t mask, unsigned int freq,
+static unsigned int check_freqs(const cpumask_t *mask, unsigned int freq,
                                 struct acpi_cpufreq_data *data)
 {
         unsigned int cur_freq;
@@ -449,7 +449,7 @@ static int acpi_cpufreq_target(struct cpufreq_policy *policy,
         drv_write(&cmd);
 
         if (acpi_pstate_strict) {
-                if (!check_freqs(cmd.mask, freqs.new, data)) {
+                if (!check_freqs(&cmd.mask, freqs.new, data)) {
                         dprintk("acpi_cpufreq_target failed (%d)\n",
                                 policy->cpu);
                         return -EAGAIN;
diff --git a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
index c99d59d8ef2e..46d4034d9f37 100644
--- a/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
+++ b/arch/x86/kernel/cpu/cpufreq/powernow-k8.c
@@ -478,12 +478,12 @@ static int core_voltage_post_transition(struct powernow_k8_data *data, u32 reqvi
 
 static int check_supported_cpu(unsigned int cpu)
 {
-        cpumask_t oldmask = CPU_MASK_ALL;
+        cpumask_t oldmask;
         u32 eax, ebx, ecx, edx;
         unsigned int rc = 0;
 
         oldmask = current->cpus_allowed;
-        set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
 
         if (smp_processor_id() != cpu) {
                 printk(KERN_ERR PFX "limiting to cpu %u failed\n", cpu);
@@ -528,7 +528,7 @@ static int check_supported_cpu(unsigned int cpu)
         rc = 1;
 
 out:
-        set_cpus_allowed(current, oldmask);
+        set_cpus_allowed_ptr(current, &oldmask);
         return rc;
 }
 
@@ -1015,7 +1015,7 @@ static int transition_frequency_pstate(struct powernow_k8_data *data, unsigned i
 /* Driver entry point to switch to the target frequency */
 static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsigned relation)
 {
-        cpumask_t oldmask = CPU_MASK_ALL;
+        cpumask_t oldmask;
         struct powernow_k8_data *data = per_cpu(powernow_data, pol->cpu);
         u32 checkfid;
         u32 checkvid;
@@ -1030,7 +1030,7 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi
 
         /* only run on specific CPU from here on */
         oldmask = current->cpus_allowed;
-        set_cpus_allowed(current, cpumask_of_cpu(pol->cpu));
+        set_cpus_allowed_ptr(current, &cpumask_of_cpu(pol->cpu));
 
         if (smp_processor_id() != pol->cpu) {
                 printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
@@ -1085,7 +1085,7 @@ static int powernowk8_target(struct cpufreq_policy *pol, unsigned targfreq, unsi
         ret = 0;
 
 err_out:
-        set_cpus_allowed(current, oldmask);
+        set_cpus_allowed_ptr(current, &oldmask);
         return ret;
 }
 
@@ -1104,7 +1104,7 @@ static int powernowk8_verify(struct cpufreq_policy *pol)
 static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
 {
         struct powernow_k8_data *data;
-        cpumask_t oldmask = CPU_MASK_ALL;
+        cpumask_t oldmask;
         int rc;
 
         if (!cpu_online(pol->cpu))
@@ -1145,7 +1145,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
 
         /* only run on specific CPU from here on */
         oldmask = current->cpus_allowed;
-        set_cpus_allowed(current, cpumask_of_cpu(pol->cpu));
+        set_cpus_allowed_ptr(current, &cpumask_of_cpu(pol->cpu));
 
         if (smp_processor_id() != pol->cpu) {
                 printk(KERN_ERR PFX "limiting to cpu %u failed\n", pol->cpu);
@@ -1164,7 +1164,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
                 fidvid_msr_init();
 
         /* run on any CPU again */
-        set_cpus_allowed(current, oldmask);
+        set_cpus_allowed_ptr(current, &oldmask);
 
         if (cpu_family == CPU_HW_PSTATE)
                 pol->cpus = cpumask_of_cpu(pol->cpu);
@@ -1205,7 +1205,7 @@ static int __cpuinit powernowk8_cpu_init(struct cpufreq_policy *pol)
         return 0;
 
 err_out:
-        set_cpus_allowed(current, oldmask);
+        set_cpus_allowed_ptr(current, &oldmask);
         powernow_k8_cpu_exit_acpi(data);
 
         kfree(data);
@@ -1242,10 +1242,11 @@ static unsigned int powernowk8_get (unsigned int cpu)
         if (!data)
                 return -EINVAL;
 
-        set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
         if (smp_processor_id() != cpu) {
-                printk(KERN_ERR PFX "limiting to CPU %d failed in powernowk8_get\n", cpu);
-                set_cpus_allowed(current, oldmask);
+                printk(KERN_ERR PFX
+                        "limiting to CPU %d failed in powernowk8_get\n", cpu);
+                set_cpus_allowed_ptr(current, &oldmask);
                 return 0;
         }
 
@@ -1253,13 +1254,14 @@ static unsigned int powernowk8_get (unsigned int cpu)
                 goto out;
 
         if (cpu_family == CPU_HW_PSTATE)
-                khz = find_khz_freq_from_pstate(data->powernow_table, data->currpstate);
+                khz = find_khz_freq_from_pstate(data->powernow_table,
+                                                data->currpstate);
         else
                 khz = find_khz_freq_from_fid(data->currfid);
 
 
 out:
-        set_cpus_allowed(current, oldmask);
+        set_cpus_allowed_ptr(current, &oldmask);
         return khz;
 }
 
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
index 3031f1196192..908dd347c67e 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-centrino.c
@@ -315,7 +315,7 @@ static unsigned int get_cur_freq(unsigned int cpu)
         cpumask_t saved_mask;
 
         saved_mask = current->cpus_allowed;
-        set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
         if (smp_processor_id() != cpu)
                 return 0;
 
@@ -333,7 +333,7 @@ static unsigned int get_cur_freq(unsigned int cpu)
                 clock_freq = extract_clock(l, cpu, 1);
         }
 
-        set_cpus_allowed(current, saved_mask);
+        set_cpus_allowed_ptr(current, &saved_mask);
         return clock_freq;
 }
 
@@ -487,7 +487,7 @@ static int centrino_target (struct cpufreq_policy *policy,
                 else
                         cpu_set(j, set_mask);
 
-                set_cpus_allowed(current, set_mask);
+                set_cpus_allowed_ptr(current, &set_mask);
                 preempt_disable();
                 if (unlikely(!cpu_isset(smp_processor_id(), set_mask))) {
                         dprintk("couldn't limit to CPUs in this domain\n");
@@ -555,7 +555,8 @@ static int centrino_target (struct cpufreq_policy *policy,
 
                 if (!cpus_empty(covered_cpus)) {
                         for_each_cpu_mask(j, covered_cpus) {
-                                set_cpus_allowed(current, cpumask_of_cpu(j));
+                                set_cpus_allowed_ptr(current,
+                                                     &cpumask_of_cpu(j));
                                 wrmsr(MSR_IA32_PERF_CTL, oldmsr, h);
                         }
                 }
@@ -569,12 +570,12 @@ static int centrino_target (struct cpufreq_policy *policy,
                         cpufreq_notify_transition(&freqs, CPUFREQ_POSTCHANGE);
                 }
         }
-        set_cpus_allowed(current, saved_mask);
+        set_cpus_allowed_ptr(current, &saved_mask);
         return 0;
 
 migrate_end:
         preempt_enable();
-        set_cpus_allowed(current, saved_mask);
+        set_cpus_allowed_ptr(current, &saved_mask);
         return 0;
 }
 
diff --git a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
index 14d68aa301ee..1b50244b1fdf 100644
--- a/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
+++ b/arch/x86/kernel/cpu/cpufreq/speedstep-ich.c
@@ -229,22 +229,22 @@ static unsigned int speedstep_detect_chipset (void)
         return 0;
 }
 
-static unsigned int _speedstep_get(cpumask_t cpus)
+static unsigned int _speedstep_get(const cpumask_t *cpus)
 {
         unsigned int speed;
         cpumask_t cpus_allowed;
 
         cpus_allowed = current->cpus_allowed;
-        set_cpus_allowed(current, cpus);
+        set_cpus_allowed_ptr(current, cpus);
         speed = speedstep_get_processor_frequency(speedstep_processor);
-        set_cpus_allowed(current, cpus_allowed);
+        set_cpus_allowed_ptr(current, &cpus_allowed);
         dprintk("detected %u kHz as current frequency\n", speed);
         return speed;
 }
 
 static unsigned int speedstep_get(unsigned int cpu)
 {
-        return _speedstep_get(cpumask_of_cpu(cpu));
+        return _speedstep_get(&cpumask_of_cpu(cpu));
 }
 
 /**
@@ -267,7 +267,7 @@ static int speedstep_target (struct cpufreq_policy *policy,
         if (cpufreq_frequency_table_target(policy, &speedstep_freqs[0], target_freq, relation, &newstate))
                 return -EINVAL;
 
-        freqs.old = _speedstep_get(policy->cpus);
+        freqs.old = _speedstep_get(&policy->cpus);
         freqs.new = speedstep_freqs[newstate].frequency;
         freqs.cpu = policy->cpu;
 
@@ -285,12 +285,12 @@ static int speedstep_target (struct cpufreq_policy *policy,
         }
 
         /* switch to physical CPU where state is to be changed */
-        set_cpus_allowed(current, policy->cpus);
+        set_cpus_allowed_ptr(current, &policy->cpus);
 
         speedstep_set_state(newstate);
 
         /* allow to be run on all CPUs */
-        set_cpus_allowed(current, cpus_allowed);
+        set_cpus_allowed_ptr(current, &cpus_allowed);
 
         for_each_cpu_mask(i, policy->cpus) {
                 freqs.cpu = i;
@@ -326,7 +326,7 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
 #endif
 
         cpus_allowed = current->cpus_allowed;
-        set_cpus_allowed(current, policy->cpus);
+        set_cpus_allowed_ptr(current, &policy->cpus);
 
         /* detect low and high frequency and transition latency */
         result = speedstep_get_freqs(speedstep_processor,
@@ -334,12 +334,12 @@ static int speedstep_cpu_init(struct cpufreq_policy *policy)
                                      &speedstep_freqs[SPEEDSTEP_HIGH].frequency,
                                      &policy->cpuinfo.transition_latency,
                                      &speedstep_set_state);
-        set_cpus_allowed(current, cpus_allowed);
+        set_cpus_allowed_ptr(current, &cpus_allowed);
         if (result)
                 return result;
 
         /* get current speed setting */
-        speed = _speedstep_get(policy->cpus);
+        speed = _speedstep_get(&policy->cpus);
         if (!speed)
                 return -EIO;
 
diff --git a/arch/x86/kernel/cpu/intel_cacheinfo.c b/arch/x86/kernel/cpu/intel_cacheinfo.c
index 1b889860eb73..26d615dcb149 100644
--- a/arch/x86/kernel/cpu/intel_cacheinfo.c
+++ b/arch/x86/kernel/cpu/intel_cacheinfo.c
@@ -129,7 +129,7 @@ struct _cpuid4_info {
         union _cpuid4_leaf_ebx ebx;
         union _cpuid4_leaf_ecx ecx;
         unsigned long size;
-        cpumask_t shared_cpu_map;
+        cpumask_t shared_cpu_map;       /* future?: only cpus/node is needed */
 };
 
 unsigned short                  num_cache_leaves;
@@ -451,8 +451,8 @@ unsigned int __cpuinit init_intel_cacheinfo(struct cpuinfo_x86 *c)
 }
 
 /* pointer to _cpuid4_info array (for each cache leaf) */
-static struct _cpuid4_info *cpuid4_info[NR_CPUS];
-#define CPUID4_INFO_IDX(x,y)    (&((cpuid4_info[x])[y]))
+static DEFINE_PER_CPU(struct _cpuid4_info *, cpuid4_info);
+#define CPUID4_INFO_IDX(x, y)    (&((per_cpu(cpuid4_info, x))[y]))
 
 #ifdef CONFIG_SMP
 static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
@@ -474,7 +474,7 @@ static void __cpuinit cache_shared_cpu_map_setup(unsigned int cpu, int index)
                         if (cpu_data(i).apicid >> index_msb ==
                             c->apicid >> index_msb) {
                                 cpu_set(i, this_leaf->shared_cpu_map);
-                                if (i != cpu && cpuid4_info[i])  {
+                                if (i != cpu && per_cpu(cpuid4_info, i))  {
                                         sibling_leaf = CPUID4_INFO_IDX(i, index);
                                         cpu_set(cpu, sibling_leaf->shared_cpu_map);
                                 }
@@ -505,8 +505,8 @@ static void __cpuinit free_cache_attributes(unsigned int cpu)
         for (i = 0; i < num_cache_leaves; i++)
                 cache_remove_shared_cpu_map(cpu, i);
 
-        kfree(cpuid4_info[cpu]);
-        cpuid4_info[cpu] = NULL;
+        kfree(per_cpu(cpuid4_info, cpu));
+        per_cpu(cpuid4_info, cpu) = NULL;
 }
 
 static int __cpuinit detect_cache_attributes(unsigned int cpu)
@@ -519,13 +519,13 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
         if (num_cache_leaves == 0)
                 return -ENOENT;
 
-        cpuid4_info[cpu] = kzalloc(
+        per_cpu(cpuid4_info, cpu) = kzalloc(
             sizeof(struct _cpuid4_info) * num_cache_leaves, GFP_KERNEL);
-        if (cpuid4_info[cpu] == NULL)
+        if (per_cpu(cpuid4_info, cpu) == NULL)
                 return -ENOMEM;
 
         oldmask = current->cpus_allowed;
-        retval = set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        retval = set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
         if (retval)
                 goto out;
 
@@ -542,12 +542,12 @@ static int __cpuinit detect_cache_attributes(unsigned int cpu)
                 }
                 cache_shared_cpu_map_setup(cpu, j);
         }
-        set_cpus_allowed(current, oldmask);
+        set_cpus_allowed_ptr(current, &oldmask);
 
 out:
         if (retval) {
-                kfree(cpuid4_info[cpu]);
-                cpuid4_info[cpu] = NULL;
+                kfree(per_cpu(cpuid4_info, cpu));
+                per_cpu(cpuid4_info, cpu) = NULL;
         }
 
         return retval;
@@ -561,7 +561,7 @@ out:
 extern struct sysdev_class cpu_sysdev_class; /* from drivers/base/cpu.c */
 
 /* pointer to kobject for cpuX/cache */
-static struct kobject * cache_kobject[NR_CPUS];
+static DEFINE_PER_CPU(struct kobject *, cache_kobject);
 
 struct _index_kobject {
         struct kobject kobj;
@@ -570,8 +570,8 @@ struct _index_kobject {
 };
 
 /* pointer to array of kobjects for cpuX/cache/indexY */
-static struct _index_kobject *index_kobject[NR_CPUS];
-#define INDEX_KOBJECT_PTR(x,y)    (&((index_kobject[x])[y]))
+static DEFINE_PER_CPU(struct _index_kobject *, index_kobject);
+#define INDEX_KOBJECT_PTR(x, y)    (&((per_cpu(index_kobject, x))[y]))
 
 #define show_one_plus(file_name, object, val)                           \
 static ssize_t show_##file_name                                         \
@@ -591,11 +591,32 @@ static ssize_t show_size(struct _cpuid4_info *this_leaf, char *buf)
         return sprintf (buf, "%luK\n", this_leaf->size / 1024);
 }
 
-static ssize_t show_shared_cpu_map(struct _cpuid4_info *this_leaf, char *buf)
+static ssize_t show_shared_cpu_map_func(struct _cpuid4_info *this_leaf,
+                                        int type, char *buf)
 {
-        char mask_str[NR_CPUS];
-        cpumask_scnprintf(mask_str, NR_CPUS, this_leaf->shared_cpu_map);
-        return sprintf(buf, "%s\n", mask_str);
+        ptrdiff_t len = PTR_ALIGN(buf + PAGE_SIZE - 1, PAGE_SIZE) - buf;
+        int n = 0;
+
+        if (len > 1) {
+                cpumask_t *mask = &this_leaf->shared_cpu_map;
+
+                n = type?
+                        cpulist_scnprintf(buf, len-2, *mask):
+                        cpumask_scnprintf(buf, len-2, *mask);
+                buf[n++] = '\n';
+                buf[n] = '\0';
+        }
+        return n;
+}
+
+static inline ssize_t show_shared_cpu_map(struct _cpuid4_info *leaf, char *buf)
+{
+        return show_shared_cpu_map_func(leaf, 0, buf);
+}
+
+static inline ssize_t show_shared_cpu_list(struct _cpuid4_info *leaf, char *buf)
+{
+        return show_shared_cpu_map_func(leaf, 1, buf);
 }
 
 static ssize_t show_type(struct _cpuid4_info *this_leaf, char *buf) {
@@ -633,6 +654,7 @@ define_one_ro(ways_of_associativity);
 define_one_ro(number_of_sets);
 define_one_ro(size);
 define_one_ro(shared_cpu_map);
+define_one_ro(shared_cpu_list);
 
 static struct attribute * default_attrs[] = {
         &type.attr,
@@ -643,6 +665,7 @@ static struct attribute * default_attrs[] = {
         &number_of_sets.attr,
         &size.attr,
         &shared_cpu_map.attr,
+        &shared_cpu_list.attr,
         NULL
 };
 
@@ -684,10 +707,10 @@ static struct kobj_type ktype_percpu_entry = {
 
 static void __cpuinit cpuid4_cache_sysfs_exit(unsigned int cpu)
 {
-        kfree(cache_kobject[cpu]);
-        kfree(index_kobject[cpu]);
-        cache_kobject[cpu] = NULL;
-        index_kobject[cpu] = NULL;
+        kfree(per_cpu(cache_kobject, cpu));
+        kfree(per_cpu(index_kobject, cpu));
+        per_cpu(cache_kobject, cpu) = NULL;
+        per_cpu(index_kobject, cpu) = NULL;
         free_cache_attributes(cpu);
 }
 
@@ -703,13 +726,14 @@ static int __cpuinit cpuid4_cache_sysfs_init(unsigned int cpu)
                 return err;
 
         /* Allocate all required memory */
-        cache_kobject[cpu] = kzalloc(sizeof(struct kobject), GFP_KERNEL);
-        if (unlikely(cache_kobject[cpu] == NULL))
+        per_cpu(cache_kobject, cpu) =
+                kzalloc(sizeof(struct kobject), GFP_KERNEL);
+        if (unlikely(per_cpu(cache_kobject, cpu) == NULL))
                 goto err_out;
 
-        index_kobject[cpu] = kzalloc(
+        per_cpu(index_kobject, cpu) = kzalloc(
             sizeof(struct _index_kobject ) * num_cache_leaves, GFP_KERNEL);
-        if (unlikely(index_kobject[cpu] == NULL))
+        if (unlikely(per_cpu(index_kobject, cpu) == NULL))
                 goto err_out;
 
         return 0;
@@ -733,7 +757,8 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
         if (unlikely(retval < 0))
                 return retval;
 
-        retval = kobject_init_and_add(cache_kobject[cpu], &ktype_percpu_entry,
+        retval = kobject_init_and_add(per_cpu(cache_kobject, cpu),
+                                      &ktype_percpu_entry,
                                       &sys_dev->kobj, "%s", "cache");
         if (retval < 0) {
                 cpuid4_cache_sysfs_exit(cpu);
@@ -745,13 +770,14 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
                 this_object->cpu = cpu;
                 this_object->index = i;
                 retval = kobject_init_and_add(&(this_object->kobj),
-                                              &ktype_cache, cache_kobject[cpu],
+                                              &ktype_cache,
+                                              per_cpu(cache_kobject, cpu),
                                               "index%1lu", i);
                 if (unlikely(retval)) {
                         for (j = 0; j < i; j++) {
                                 kobject_put(&(INDEX_KOBJECT_PTR(cpu,j)->kobj));
                         }
-                        kobject_put(cache_kobject[cpu]);
+                        kobject_put(per_cpu(cache_kobject, cpu));
                         cpuid4_cache_sysfs_exit(cpu);
                         break;
                 }
@@ -760,7 +786,7 @@ static int __cpuinit cache_add_dev(struct sys_device * sys_dev)
         if (!retval)
                 cpu_set(cpu, cache_dev_map);
 
-        kobject_uevent(cache_kobject[cpu], KOBJ_ADD);
+        kobject_uevent(per_cpu(cache_kobject, cpu), KOBJ_ADD);
         return retval;
 }
 
@@ -769,7 +795,7 @@ static void __cpuinit cache_remove_dev(struct sys_device * sys_dev)
         unsigned int cpu = sys_dev->id;
         unsigned long i;
 
-        if (cpuid4_info[cpu] == NULL)
+        if (per_cpu(cpuid4_info, cpu) == NULL)
                 return;
         if (!cpu_isset(cpu, cache_dev_map))
                 return;
@@ -777,7 +803,7 @@ static void __cpuinit cache_remove_dev(struct sys_device * sys_dev)
 
         for (i = 0; i < num_cache_leaves; i++)
                 kobject_put(&(INDEX_KOBJECT_PTR(cpu,i)->kobj));
-        kobject_put(cache_kobject[cpu]);
+        kobject_put(per_cpu(cache_kobject, cpu));
         cpuid4_cache_sysfs_exit(cpu);
 }
 
diff --git a/arch/x86/kernel/cpu/mcheck/mce_amd_64.c b/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
index 32671da8184e..7c9a813e1193 100644
--- a/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
+++ b/arch/x86/kernel/cpu/mcheck/mce_amd_64.c
@@ -251,18 +251,18 @@ struct threshold_attr {
         ssize_t(*store) (struct threshold_block *, const char *, size_t count);
 };
 
-static cpumask_t affinity_set(unsigned int cpu)
+static void affinity_set(unsigned int cpu, cpumask_t *oldmask,
+                                           cpumask_t *newmask)
 {
-        cpumask_t oldmask = current->cpus_allowed;
-        cpumask_t newmask = CPU_MASK_NONE;
-        cpu_set(cpu, newmask);
-        set_cpus_allowed(current, newmask);
-        return oldmask;
+        *oldmask = current->cpus_allowed;
+        cpus_clear(*newmask);
+        cpu_set(cpu, *newmask);
+        set_cpus_allowed_ptr(current, newmask);
 }
 
-static void affinity_restore(cpumask_t oldmask)
+static void affinity_restore(const cpumask_t *oldmask)
 {
-        set_cpus_allowed(current, oldmask);
+        set_cpus_allowed_ptr(current, oldmask);
 }
 
 #define SHOW_FIELDS(name)                                           \
@@ -277,15 +277,15 @@ static ssize_t store_interrupt_enable(struct threshold_block *b,
                                       const char *buf, size_t count)
 {
         char *end;
-        cpumask_t oldmask;
+        cpumask_t oldmask, newmask;
         unsigned long new = simple_strtoul(buf, &end, 0);
         if (end == buf)
                 return -EINVAL;
         b->interrupt_enable = !!new;
 
-        oldmask = affinity_set(b->cpu);
+        affinity_set(b->cpu, &oldmask, &newmask);
         threshold_restart_bank(b, 0, 0);
-        affinity_restore(oldmask);
+        affinity_restore(&oldmask);
 
         return end - buf;
 }
@@ -294,7 +294,7 @@ static ssize_t store_threshold_limit(struct threshold_block *b,
                                      const char *buf, size_t count)
 {
         char *end;
-        cpumask_t oldmask;
+        cpumask_t oldmask, newmask;
         u16 old;
         unsigned long new = simple_strtoul(buf, &end, 0);
         if (end == buf)
@@ -306,9 +306,9 @@ static ssize_t store_threshold_limit(struct threshold_block *b,
         old = b->threshold_limit;
         b->threshold_limit = new;
 
-        oldmask = affinity_set(b->cpu);
+        affinity_set(b->cpu, &oldmask, &newmask);
         threshold_restart_bank(b, 0, old);
-        affinity_restore(oldmask);
+        affinity_restore(&oldmask);
 
         return end - buf;
 }
@@ -316,10 +316,10 @@ static ssize_t store_threshold_limit(struct threshold_block *b,
 static ssize_t show_error_count(struct threshold_block *b, char *buf)
 {
         u32 high, low;
-        cpumask_t oldmask;
-        oldmask = affinity_set(b->cpu);
+        cpumask_t oldmask, newmask;
+        affinity_set(b->cpu, &oldmask, &newmask);
         rdmsr(b->address, low, high);
-        affinity_restore(oldmask);
+        affinity_restore(&oldmask);
         return sprintf(buf, "%x\n",
                        (high & 0xFFF) - (THRESHOLD_MAX - b->threshold_limit));
 }
@@ -327,10 +327,10 @@ static ssize_t show_error_count(struct threshold_block *b, char *buf)
 static ssize_t store_error_count(struct threshold_block *b,
                                  const char *buf, size_t count)
 {
-        cpumask_t oldmask;
-        oldmask = affinity_set(b->cpu);
+        cpumask_t oldmask, newmask;
+        affinity_set(b->cpu, &oldmask, &newmask);
         threshold_restart_bank(b, 1, 0);
-        affinity_restore(oldmask);
+        affinity_restore(&oldmask);
         return 1;
 }
 
@@ -468,7 +468,7 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
 {
         int i, err = 0;
         struct threshold_bank *b = NULL;
-        cpumask_t oldmask = CPU_MASK_NONE;
+        cpumask_t oldmask, newmask;
         char name[32];
 
         sprintf(name, "threshold_bank%i", bank);
@@ -519,10 +519,10 @@ static __cpuinit int threshold_create_bank(unsigned int cpu, unsigned int bank)
 
         per_cpu(threshold_banks, cpu)[bank] = b;
 
-        oldmask = affinity_set(cpu);
+        affinity_set(cpu, &oldmask, &newmask);
         err = allocate_threshold_blocks(cpu, bank, 0,
                                         MSR_IA32_MC0_MISC + bank * 4);
-        affinity_restore(oldmask);
+        affinity_restore(&oldmask);
 
         if (err)
                 goto out_free;
diff --git a/arch/x86/kernel/io_apic_64.c b/arch/x86/kernel/io_apic_64.c
index b54464b26658..9ba11d07920f 100644
--- a/arch/x86/kernel/io_apic_64.c
+++ b/arch/x86/kernel/io_apic_64.c
@@ -785,7 +785,7 @@ static void __clear_irq_vector(int irq)
                 per_cpu(vector_irq, cpu)[vector] = -1;
 
         cfg->vector = 0;
-        cfg->domain = CPU_MASK_NONE;
+        cpus_clear(cfg->domain);
 }
 
 void __setup_vector_irq(int cpu)
diff --git a/arch/x86/kernel/microcode.c b/arch/x86/kernel/microcode.c
index 25cf6dee4e56..69729e38b78a 100644
--- a/arch/x86/kernel/microcode.c
+++ b/arch/x86/kernel/microcode.c
@@ -402,7 +402,7 @@ static int do_microcode_update (void)
 
                         if (!uci->valid)
                                 continue;
-                        set_cpus_allowed(current, cpumask_of_cpu(cpu));
+                        set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
                         error = get_maching_microcode(new_mc, cpu);
                         if (error < 0)
                                 goto out;
@@ -416,7 +416,7 @@ out:
                 vfree(new_mc);
         if (cursor < 0)
                 error = cursor;
-        set_cpus_allowed(current, old);
+        set_cpus_allowed_ptr(current, &old);
         return error;
 }
 
@@ -579,7 +579,7 @@ static int apply_microcode_check_cpu(int cpu)
                 return 0;
 
         old = current->cpus_allowed;
-        set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
 
         /* Check if the microcode we have in memory matches the CPU */
         if (c->x86_vendor != X86_VENDOR_INTEL || c->x86 < 6 ||
@@ -610,7 +610,7 @@ static int apply_microcode_check_cpu(int cpu)
                         " sig=0x%x, pf=0x%x, rev=0x%x\n",
                         cpu, uci->sig, uci->pf, uci->rev);
 
-        set_cpus_allowed(current, old);
+        set_cpus_allowed_ptr(current, &old);
         return err;
 }
 
@@ -621,13 +621,13 @@ static void microcode_init_cpu(int cpu, int resume)
 
         old = current->cpus_allowed;
 
-        set_cpus_allowed(current, cpumask_of_cpu(cpu));
+        set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
         mutex_lock(&microcode_mutex);
         collect_cpu_info(cpu);
         if (uci->valid && system_state == SYSTEM_RUNNING && !resume)
                 cpu_request_microcode(cpu);
         mutex_unlock(&microcode_mutex);
-        set_cpus_allowed(current, old);
+        set_cpus_allowed_ptr(current, &old);
 }
 
 static void microcode_fini_cpu(int cpu)
@@ -657,14 +657,14 @@ static ssize_t reload_store(struct sys_device *dev, const char *buf, size_t sz)
                 old = current->cpus_allowed;
 
                 get_online_cpus();
-                set_cpus_allowed(current, cpumask_of_cpu(cpu));
+                set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
 
                 mutex_lock(&microcode_mutex);
                 if (uci->valid)
                         err = cpu_request_microcode(cpu);
                 mutex_unlock(&microcode_mutex);
                 put_online_cpus();
-                set_cpus_allowed(current, old);
+                set_cpus_allowed_ptr(current, &old);
         }
         if (err)
                 return err;
diff --git a/arch/x86/kernel/reboot.c b/arch/x86/kernel/reboot.c
index 9692202d3bfb..19c9386ac118 100644
--- a/arch/x86/kernel/reboot.c
+++ b/arch/x86/kernel/reboot.c
@@ -420,7 +420,7 @@ static void native_machine_shutdown(void)
                 reboot_cpu_id = smp_processor_id();
 
         /* Make certain I only run on the appropriate processor */
-        set_cpus_allowed(current, cpumask_of_cpu(reboot_cpu_id));
+        set_cpus_allowed_ptr(current, &cpumask_of_cpu(reboot_cpu_id));
 
         /* O.K Now that I'm on the appropriate processor,
          * stop all of the others.
diff --git a/arch/x86/kernel/setup.c b/arch/x86/kernel/setup.c
index ed157c90412e..0d1f44ae6eea 100644
--- a/arch/x86/kernel/setup.c
+++ b/arch/x86/kernel/setup.c
@@ -54,6 +54,24 @@ static void __init setup_per_cpu_maps(void)
 #endif
 }
 
+#ifdef CONFIG_HAVE_CPUMASK_OF_CPU_MAP
+cpumask_t *cpumask_of_cpu_map __read_mostly;
+EXPORT_SYMBOL(cpumask_of_cpu_map);
+
+/* requires nr_cpu_ids to be initialized */
+static void __init setup_cpumask_of_cpu(void)
+{
+        int i;
+
+        /* alloc_bootmem zeroes memory */
+        cpumask_of_cpu_map = alloc_bootmem_low(sizeof(cpumask_t) * nr_cpu_ids);
+        for (i = 0; i < nr_cpu_ids; i++)
+                cpu_set(i, cpumask_of_cpu_map[i]);
+}
+#else
+static inline void setup_cpumask_of_cpu(void) { }
+#endif
+
 #ifdef CONFIG_X86_32
 /*
  * Great future not-so-futuristic plan: make i386 and x86_64 do it
@@ -70,7 +88,7 @@ EXPORT_SYMBOL(__per_cpu_offset);
  */
 void __init setup_per_cpu_areas(void)
 {
-        int i;
+        int i, highest_cpu = 0;
         unsigned long size;
 
 #ifdef CONFIG_HOTPLUG_CPU
@@ -104,10 +122,18 @@ void __init setup_per_cpu_areas(void)
                 __per_cpu_offset[i] = ptr - __per_cpu_start;
 #endif
                 memcpy(ptr, __per_cpu_start, __per_cpu_end - __per_cpu_start);
+
+                highest_cpu = i;
         }
 
+        nr_cpu_ids = highest_cpu + 1;
+        printk(KERN_DEBUG "NR_CPUS: %d, nr_cpu_ids: %d\n", NR_CPUS, nr_cpu_ids);
+
         /* Setup percpu data maps */
         setup_per_cpu_maps();
+
+        /* Setup cpumask_of_cpu map */
+        setup_cpumask_of_cpu();
 }
 
 #endif