Merge branch 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip

* 'cpus4096-for-linus-3' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/linux-2.6-tip: (77 commits)
  x86: setup_per_cpu_areas() cleanup
  cpumask: fix compile error when CONFIG_NR_CPUS is not defined
  cpumask: use alloc_cpumask_var_node where appropriate
  cpumask: convert shared_cpu_map in acpi_processor* structs to cpumask_var_t
  x86: use cpumask_var_t in acpi/boot.c
  x86: cleanup some remaining usages of NR_CPUS where s/b nr_cpu_ids
  sched: put back some stack hog changes that were undone in kernel/sched.c
  x86: enable cpus display of kernel_max and offlined cpus
  ia64: cpumask fix for is_affinity_mask_valid()
  cpumask: convert RCU implementations, fix
  xtensa: define __fls
  mn10300: define __fls
  m32r: define __fls
  h8300: define __fls
  frv: define __fls
  cris: define __fls
  cpumask: CONFIG_DISABLE_OBSOLETE_CPUMASK_FUNCTIONS
  cpumask: zero extra bits in alloc_cpumask_var_node
  cpumask: replace for_each_cpu_mask_nr with for_each_cpu in kernel/time/
  cpumask: convert mm/
  ...

29 files changed, 495 insertions, 420 deletions

diff --git a/kernel/compat.c b/kernel/compat.c
index 8eafe3eb50d9..d52e2ec1deb5 100644
--- a/kernel/compat.c
+++ b/kernel/compat.c
@@ -454,16 +454,16 @@ asmlinkage long compat_sys_waitid(int which, compat_pid_t pid,
 }
 
 static int compat_get_user_cpu_mask(compat_ulong_t __user *user_mask_ptr,
-                                    unsigned len, cpumask_t *new_mask)
+                                    unsigned len, struct cpumask *new_mask)
 {
         unsigned long *k;
 
-        if (len < sizeof(cpumask_t))
-                memset(new_mask, 0, sizeof(cpumask_t));
-        else if (len > sizeof(cpumask_t))
-                len = sizeof(cpumask_t);
+        if (len < cpumask_size())
+                memset(new_mask, 0, cpumask_size());
+        else if (len > cpumask_size())
+                len = cpumask_size();
 
-        k = cpus_addr(*new_mask);
+        k = cpumask_bits(new_mask);
         return compat_get_bitmap(k, user_mask_ptr, len * 8);
 }
 
@@ -471,40 +471,51 @@ asmlinkage long compat_sys_sched_setaffinity(compat_pid_t pid,
                                              unsigned int len,
                                              compat_ulong_t __user *user_mask_ptr)
 {
-        cpumask_t new_mask;
+        cpumask_var_t new_mask;
         int retval;
 
-        retval = compat_get_user_cpu_mask(user_mask_ptr, len, &new_mask);
+        if (!alloc_cpumask_var(&new_mask, GFP_KERNEL))
+                return -ENOMEM;
+
+        retval = compat_get_user_cpu_mask(user_mask_ptr, len, new_mask);
         if (retval)
-                return retval;
+                goto out;
 
-        return sched_setaffinity(pid, &new_mask);
+        retval = sched_setaffinity(pid, new_mask);
+out:
+        free_cpumask_var(new_mask);
+        return retval;
 }
 
 asmlinkage long compat_sys_sched_getaffinity(compat_pid_t pid, unsigned int len,
                                              compat_ulong_t __user *user_mask_ptr)
 {
         int ret;
-        cpumask_t mask;
+        cpumask_var_t mask;
         unsigned long *k;
-        unsigned int min_length = sizeof(cpumask_t);
+        unsigned int min_length = cpumask_size();
 
-        if (NR_CPUS <= BITS_PER_COMPAT_LONG)
+        if (nr_cpu_ids <= BITS_PER_COMPAT_LONG)
                 min_length = sizeof(compat_ulong_t);
 
         if (len < min_length)
                 return -EINVAL;
 
-        ret = sched_getaffinity(pid, &mask);
+        if (!alloc_cpumask_var(&mask, GFP_KERNEL))
+                return -ENOMEM;
+
+        ret = sched_getaffinity(pid, mask);
         if (ret < 0)
-                return ret;
+                goto out;
 
-        k = cpus_addr(mask);
+        k = cpumask_bits(mask);
         ret = compat_put_bitmap(user_mask_ptr, k, min_length * 8);
-        if (ret)
-                return ret;
+        if (ret == 0)
+                ret = min_length;
 
-        return min_length;
+out:
+        free_cpumask_var(mask);
+        return ret;
 }
 
 int get_compat_itimerspec(struct itimerspec *dst,
diff --git a/kernel/cpu.c b/kernel/cpu.c
index bae131a1211b..47fff3b63cbf 100644
--- a/kernel/cpu.c
+++ b/kernel/cpu.c
@@ -15,30 +15,8 @@
 #include <linux/stop_machine.h>
 #include <linux/mutex.h>
 
-/*
- * Represents all cpu's present in the system
- * In systems capable of hotplug, this map could dynamically grow
- * as new cpu's are detected in the system via any platform specific
- * method, such as ACPI for e.g.
- */
-cpumask_t cpu_present_map __read_mostly;
-EXPORT_SYMBOL(cpu_present_map);
-
-/*
- * Represents all cpu's that are currently online.
- */
-cpumask_t cpu_online_map __read_mostly;
-EXPORT_SYMBOL(cpu_online_map);
-
-#ifdef CONFIG_INIT_ALL_POSSIBLE
-cpumask_t cpu_possible_map __read_mostly = CPU_MASK_ALL;
-#else
-cpumask_t cpu_possible_map __read_mostly;
-#endif
-EXPORT_SYMBOL(cpu_possible_map);
-
 #ifdef CONFIG_SMP
-/* Serializes the updates to cpu_online_map, cpu_present_map */
+/* Serializes the updates to cpu_online_mask, cpu_present_mask */
 static DEFINE_MUTEX(cpu_add_remove_lock);
 
 static __cpuinitdata RAW_NOTIFIER_HEAD(cpu_chain);
@@ -65,8 +43,6 @@ void __init cpu_hotplug_init(void)
         cpu_hotplug.refcount = 0;
 }
 
-cpumask_t cpu_active_map;
-
 #ifdef CONFIG_HOTPLUG_CPU
 
 void get_online_cpus(void)
@@ -97,7 +73,7 @@ EXPORT_SYMBOL_GPL(put_online_cpus);
 
 /*
  * The following two API's must be used when attempting
- * to serialize the updates to cpu_online_map, cpu_present_map.
+ * to serialize the updates to cpu_online_mask, cpu_present_mask.
  */
 void cpu_maps_update_begin(void)
 {
@@ -218,7 +194,7 @@ static int __ref take_cpu_down(void *_param)
 static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
 {
         int err, nr_calls = 0;
-        cpumask_t old_allowed, tmp;
+        cpumask_var_t old_allowed;
         void *hcpu = (void *)(long)cpu;
         unsigned long mod = tasks_frozen ? CPU_TASKS_FROZEN : 0;
         struct take_cpu_down_param tcd_param = {
@@ -232,6 +208,9 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
         if (!cpu_online(cpu))
                 return -EINVAL;
 
+        if (!alloc_cpumask_var(&old_allowed, GFP_KERNEL))
+                return -ENOMEM;
+
         cpu_hotplug_begin();
         err = __raw_notifier_call_chain(&cpu_chain, CPU_DOWN_PREPARE | mod,
                                         hcpu, -1, &nr_calls);
@@ -246,13 +225,11 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
         }
 
         /* Ensure that we are not runnable on dying cpu */
-        old_allowed = current->cpus_allowed;
-        cpus_setall(tmp);
-        cpu_clear(cpu, tmp);
-        set_cpus_allowed_ptr(current, &tmp);
-        tmp = cpumask_of_cpu(cpu);
+        cpumask_copy(old_allowed, &current->cpus_allowed);
+        set_cpus_allowed_ptr(current,
+                             cpumask_of(cpumask_any_but(cpu_online_mask, cpu)));
 
-        err = __stop_machine(take_cpu_down, &tcd_param, &tmp);
+        err = __stop_machine(take_cpu_down, &tcd_param, cpumask_of(cpu));
         if (err) {
                 /* CPU didn't die: tell everyone.  Can't complain. */
                 if (raw_notifier_call_chain(&cpu_chain, CPU_DOWN_FAILED | mod,
@@ -278,7 +255,7 @@ static int __ref _cpu_down(unsigned int cpu, int tasks_frozen)
         check_for_tasks(cpu);
 
 out_allowed:
-        set_cpus_allowed_ptr(current, &old_allowed);
+        set_cpus_allowed_ptr(current, old_allowed);
 out_release:
         cpu_hotplug_done();
         if (!err) {
@@ -286,6 +263,7 @@ out_release:
                                             hcpu) == NOTIFY_BAD)
                         BUG();
         }
+        free_cpumask_var(old_allowed);
         return err;
 }
 
@@ -304,7 +282,7 @@ int __ref cpu_down(unsigned int cpu)
 
         /*
          * Make sure the all cpus did the reschedule and are not
-         * using stale version of the cpu_active_map.
+         * using stale version of the cpu_active_mask.
          * This is not strictly necessary becuase stop_machine()
          * that we run down the line already provides the required
          * synchronization. But it's really a side effect and we do not
@@ -368,7 +346,7 @@ out_notify:
 int __cpuinit cpu_up(unsigned int cpu)
 {
         int err = 0;
-        if (!cpu_isset(cpu, cpu_possible_map)) {
+        if (!cpu_possible(cpu)) {
                 printk(KERN_ERR "can't online cpu %d because it is not "
                         "configured as may-hotadd at boot time\n", cpu);
 #if defined(CONFIG_IA64) || defined(CONFIG_X86_64)
@@ -393,25 +371,25 @@ out:
 }
 
 #ifdef CONFIG_PM_SLEEP_SMP
-static cpumask_t frozen_cpus;
+static cpumask_var_t frozen_cpus;
 
 int disable_nonboot_cpus(void)
 {
         int cpu, first_cpu, error = 0;
 
         cpu_maps_update_begin();
-        first_cpu = first_cpu(cpu_online_map);
+        first_cpu = cpumask_first(cpu_online_mask);
         /* We take down all of the non-boot CPUs in one shot to avoid races
          * with the userspace trying to use the CPU hotplug at the same time
          */
-        cpus_clear(frozen_cpus);
+        cpumask_clear(frozen_cpus);
         printk("Disabling non-boot CPUs ...\n");
         for_each_online_cpu(cpu) {
                 if (cpu == first_cpu)
                         continue;
                 error = _cpu_down(cpu, 1);
                 if (!error) {
-                        cpu_set(cpu, frozen_cpus);
+                        cpumask_set_cpu(cpu, frozen_cpus);
                         printk("CPU%d is down\n", cpu);
                 } else {
                         printk(KERN_ERR "Error taking CPU%d down: %d\n",
@@ -437,11 +415,11 @@ void __ref enable_nonboot_cpus(void)
         /* Allow everyone to use the CPU hotplug again */
         cpu_maps_update_begin();
         cpu_hotplug_disabled = 0;
-        if (cpus_empty(frozen_cpus))
+        if (cpumask_empty(frozen_cpus))
                 goto out;
 
         printk("Enabling non-boot CPUs ...\n");
-        for_each_cpu_mask_nr(cpu, frozen_cpus) {
+        for_each_cpu(cpu, frozen_cpus) {
                 error = _cpu_up(cpu, 1);
                 if (!error) {
                         printk("CPU%d is up\n", cpu);
@@ -449,10 +427,18 @@ void __ref enable_nonboot_cpus(void)
                 }
                 printk(KERN_WARNING "Error taking CPU%d up: %d\n", cpu, error);
         }
-        cpus_clear(frozen_cpus);
+        cpumask_clear(frozen_cpus);
 out:
         cpu_maps_update_done();
 }
+
+static int alloc_frozen_cpus(void)
+{
+        if (!alloc_cpumask_var(&frozen_cpus, GFP_KERNEL|__GFP_ZERO))
+                return -ENOMEM;
+        return 0;
+}
+core_initcall(alloc_frozen_cpus);
 #endif /* CONFIG_PM_SLEEP_SMP */
 
 /**
@@ -468,7 +454,7 @@ void __cpuinit notify_cpu_starting(unsigned int cpu)
         unsigned long val = CPU_STARTING;
 
 #ifdef CONFIG_PM_SLEEP_SMP
-        if (cpu_isset(cpu, frozen_cpus))
+        if (frozen_cpus != NULL && cpumask_test_cpu(cpu, frozen_cpus))
                 val = CPU_STARTING_FROZEN;
 #endif /* CONFIG_PM_SLEEP_SMP */
         raw_notifier_call_chain(&cpu_chain, val, (void *)(long)cpu);
@@ -480,7 +466,7 @@ void __cpuinit notify_cpu_starting(unsigned int cpu)
  * cpu_bit_bitmap[] is a special, "compressed" data structure that
  * represents all NR_CPUS bits binary values of 1<<nr.
  *
- * It is used by cpumask_of_cpu() to get a constant address to a CPU
+ * It is used by cpumask_of() to get a constant address to a CPU
  * mask value that has a single bit set only.
  */
 
@@ -503,3 +489,71 @@ EXPORT_SYMBOL_GPL(cpu_bit_bitmap);
 
 const DECLARE_BITMAP(cpu_all_bits, NR_CPUS) = CPU_BITS_ALL;
 EXPORT_SYMBOL(cpu_all_bits);
+
+#ifdef CONFIG_INIT_ALL_POSSIBLE
+static DECLARE_BITMAP(cpu_possible_bits, CONFIG_NR_CPUS) __read_mostly
+        = CPU_BITS_ALL;
+#else
+static DECLARE_BITMAP(cpu_possible_bits, CONFIG_NR_CPUS) __read_mostly;
+#endif
+const struct cpumask *const cpu_possible_mask = to_cpumask(cpu_possible_bits);
+EXPORT_SYMBOL(cpu_possible_mask);
+
+static DECLARE_BITMAP(cpu_online_bits, CONFIG_NR_CPUS) __read_mostly;
+const struct cpumask *const cpu_online_mask = to_cpumask(cpu_online_bits);
+EXPORT_SYMBOL(cpu_online_mask);
+
+static DECLARE_BITMAP(cpu_present_bits, CONFIG_NR_CPUS) __read_mostly;
+const struct cpumask *const cpu_present_mask = to_cpumask(cpu_present_bits);
+EXPORT_SYMBOL(cpu_present_mask);
+
+static DECLARE_BITMAP(cpu_active_bits, CONFIG_NR_CPUS) __read_mostly;
+const struct cpumask *const cpu_active_mask = to_cpumask(cpu_active_bits);
+EXPORT_SYMBOL(cpu_active_mask);
+
+void set_cpu_possible(unsigned int cpu, bool possible)
+{
+        if (possible)
+                cpumask_set_cpu(cpu, to_cpumask(cpu_possible_bits));
+        else
+                cpumask_clear_cpu(cpu, to_cpumask(cpu_possible_bits));
+}
+
+void set_cpu_present(unsigned int cpu, bool present)
+{
+        if (present)
+                cpumask_set_cpu(cpu, to_cpumask(cpu_present_bits));
+        else
+                cpumask_clear_cpu(cpu, to_cpumask(cpu_present_bits));
+}
+
+void set_cpu_online(unsigned int cpu, bool online)
+{
+        if (online)
+                cpumask_set_cpu(cpu, to_cpumask(cpu_online_bits));
+        else
+                cpumask_clear_cpu(cpu, to_cpumask(cpu_online_bits));
+}
+
+void set_cpu_active(unsigned int cpu, bool active)
+{
+        if (active)
+                cpumask_set_cpu(cpu, to_cpumask(cpu_active_bits));
+        else
+                cpumask_clear_cpu(cpu, to_cpumask(cpu_active_bits));
+}
+
+void init_cpu_present(const struct cpumask *src)
+{
+        cpumask_copy(to_cpumask(cpu_present_bits), src);
+}
+
+void init_cpu_possible(const struct cpumask *src)
+{
+        cpumask_copy(to_cpumask(cpu_possible_bits), src);
+}
+
+void init_cpu_online(const struct cpumask *src)
+{
+        cpumask_copy(to_cpumask(cpu_online_bits), src);
+}
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 61c4a9b62165..cd0cd8dcb345 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -16,8 +16,15 @@
 #include "internals.h"
 
 #ifdef CONFIG_SMP
+cpumask_var_t irq_default_affinity;
 
-cpumask_t irq_default_affinity = CPU_MASK_ALL;
+static int init_irq_default_affinity(void)
+{
+        alloc_cpumask_var(&irq_default_affinity, GFP_KERNEL);
+        cpumask_setall(irq_default_affinity);
+        return 0;
+}
+core_initcall(init_irq_default_affinity);
 
 /**
  *      synchronize_irq - wait for pending IRQ handlers (on other CPUs)
@@ -127,7 +134,7 @@ int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc)
                         desc->status &= ~IRQ_AFFINITY_SET;
         }
 
-        cpumask_and(&desc->affinity, cpu_online_mask, &irq_default_affinity);
+        cpumask_and(&desc->affinity, cpu_online_mask, irq_default_affinity);
 set_affinity:
         desc->chip->set_affinity(irq, &desc->affinity);
 
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index d2c0e5ee53c5..aae3f742bcec 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -20,7 +20,7 @@ static struct proc_dir_entry *root_irq_dir;
 static int irq_affinity_proc_show(struct seq_file *m, void *v)
 {
         struct irq_desc *desc = irq_to_desc((long)m->private);
-        cpumask_t *mask = &desc->affinity;
+        const struct cpumask *mask = &desc->affinity;
 
 #ifdef CONFIG_GENERIC_PENDING_IRQ
         if (desc->status & IRQ_MOVE_PENDING)
@@ -54,7 +54,7 @@ static ssize_t irq_affinity_proc_write(struct file *file,
         if (err)
                 goto free_cpumask;
 
-        if (!is_affinity_mask_valid(*new_value)) {
+        if (!is_affinity_mask_valid(new_value)) {
                 err = -EINVAL;
                 goto free_cpumask;
         }
@@ -93,7 +93,7 @@ static const struct file_operations irq_affinity_proc_fops = {
 
 static int default_affinity_show(struct seq_file *m, void *v)
 {
-        seq_cpumask(m, &irq_default_affinity);
+        seq_cpumask(m, irq_default_affinity);
         seq_putc(m, '\n');
         return 0;
 }
@@ -101,27 +101,37 @@ static int default_affinity_show(struct seq_file *m, void *v)
 static ssize_t default_affinity_write(struct file *file,
                 const char __user *buffer, size_t count, loff_t *ppos)
 {
-        cpumask_t new_value;
+        cpumask_var_t new_value;
         int err;
 
-        err = cpumask_parse_user(buffer, count, &new_value);
+        if (!alloc_cpumask_var(&new_value, GFP_KERNEL))
+                return -ENOMEM;
+
+        err = cpumask_parse_user(buffer, count, new_value);
         if (err)
-                return err;
+                goto out;
 
-        if (!is_affinity_mask_valid(new_value))
-                return -EINVAL;
+        if (!is_affinity_mask_valid(new_value)) {
+                err = -EINVAL;
+                goto out;
+        }
 
         /*
          * Do not allow disabling IRQs completely - it's a too easy
          * way to make the system unusable accidentally :-) At least
          * one online CPU still has to be targeted.
          */
-        if (!cpus_intersects(new_value, cpu_online_map))
-                return -EINVAL;
+        if (!cpumask_intersects(new_value, cpu_online_mask)) {
+                err = -EINVAL;
+                goto out;
+        }
 
-        irq_default_affinity = new_value;
+        cpumask_copy(irq_default_affinity, new_value);
+        err = count;
 
-        return count;
+out:
+        free_cpumask_var(new_value);
+        return err;
 }
 
 static int default_affinity_open(struct inode *inode, struct file *file)
diff --git a/kernel/kexec.c b/kernel/kexec.c
index ac0fde7b54d0..3fb855ad6aa0 100644
--- a/kernel/kexec.c
+++ b/kernel/kexec.c
@@ -1116,7 +1116,7 @@ void crash_save_cpu(struct pt_regs *regs, int cpu)
         struct elf_prstatus prstatus;
         u32 *buf;
 
-        if ((cpu < 0) || (cpu >= NR_CPUS))
+        if ((cpu < 0) || (cpu >= nr_cpu_ids))
                 return;
 
         /* Using ELF notes here is opportunistic.
diff --git a/kernel/power/poweroff.c b/kernel/power/poweroff.c
index 72016f051477..97890831e1b5 100644
--- a/kernel/power/poweroff.c
+++ b/kernel/power/poweroff.c
@@ -27,7 +27,7 @@ static DECLARE_WORK(poweroff_work, do_poweroff);
 static void handle_poweroff(int key, struct tty_struct *tty)
 {
         /* run sysrq poweroff on boot cpu */
-        schedule_work_on(first_cpu(cpu_online_map), &poweroff_work);
+        schedule_work_on(cpumask_first(cpu_online_mask), &poweroff_work);
 }
 
 static struct sysrq_key_op      sysrq_poweroff_op = {
diff --git a/kernel/profile.c b/kernel/profile.c
index 4cb7d68fed82..d18e2d2654f2 100644
--- a/kernel/profile.c
+++ b/kernel/profile.c
@@ -45,7 +45,7 @@ static unsigned long prof_len, prof_shift;
 int prof_on __read_mostly;
 EXPORT_SYMBOL_GPL(prof_on);
 
-static cpumask_t prof_cpu_mask = CPU_MASK_ALL;
+static cpumask_var_t prof_cpu_mask;
 #ifdef CONFIG_SMP
 static DEFINE_PER_CPU(struct profile_hit *[2], cpu_profile_hits);
 static DEFINE_PER_CPU(int, cpu_profile_flip);
@@ -113,9 +113,13 @@ int __ref profile_init(void)
         buffer_bytes = prof_len*sizeof(atomic_t);
         if (!slab_is_available()) {
                 prof_buffer = alloc_bootmem(buffer_bytes);
+                alloc_bootmem_cpumask_var(&prof_cpu_mask);
                 return 0;
         }
 
+        if (!alloc_cpumask_var(&prof_cpu_mask, GFP_KERNEL))
+                return -ENOMEM;
+
         prof_buffer = kzalloc(buffer_bytes, GFP_KERNEL);
         if (prof_buffer)
                 return 0;
@@ -128,6 +132,7 @@ int __ref profile_init(void)
         if (prof_buffer)
                 return 0;
 
+        free_cpumask_var(prof_cpu_mask);
         return -ENOMEM;
 }
 
@@ -386,13 +391,15 @@ out_free:
                 return NOTIFY_BAD;
         case CPU_ONLINE:
         case CPU_ONLINE_FROZEN:
-                cpu_set(cpu, prof_cpu_mask);
+                if (prof_cpu_mask != NULL)
+                        cpumask_set_cpu(cpu, prof_cpu_mask);
                 break;
         case CPU_UP_CANCELED:
         case CPU_UP_CANCELED_FROZEN:
         case CPU_DEAD:
         case CPU_DEAD_FROZEN:
-                cpu_clear(cpu, prof_cpu_mask);
+                if (prof_cpu_mask != NULL)
+                        cpumask_clear_cpu(cpu, prof_cpu_mask);
                 if (per_cpu(cpu_profile_hits, cpu)[0]) {
                         page = virt_to_page(per_cpu(cpu_profile_hits, cpu)[0]);
                         per_cpu(cpu_profile_hits, cpu)[0] = NULL;
@@ -430,7 +437,8 @@ void profile_tick(int type)
 
         if (type == CPU_PROFILING && timer_hook)
                 timer_hook(regs);
-        if (!user_mode(regs) && cpu_isset(smp_processor_id(), prof_cpu_mask))
+        if (!user_mode(regs) && prof_cpu_mask != NULL &&
+            cpumask_test_cpu(smp_processor_id(), prof_cpu_mask))
                 profile_hit(type, (void *)profile_pc(regs));
 }
 
@@ -442,7 +450,7 @@ void profile_tick(int type)
 static int prof_cpu_mask_read_proc(char *page, char **start, off_t off,
                         int count, int *eof, void *data)
 {
-        int len = cpumask_scnprintf(page, count, (cpumask_t *)data);
+        int len = cpumask_scnprintf(page, count, data);
         if (count - len < 2)
                 return -EINVAL;
         len += sprintf(page + len, "\n");
@@ -452,16 +460,20 @@ static int prof_cpu_mask_read_proc(char *page, char **start, off_t off,
 static int prof_cpu_mask_write_proc(struct file *file,
         const char __user *buffer,  unsigned long count, void *data)
 {
-        cpumask_t *mask = (cpumask_t *)data;
+        struct cpumask *mask = data;
         unsigned long full_count = count, err;
-        cpumask_t new_value;
+        cpumask_var_t new_value;
 
-        err = cpumask_parse_user(buffer, count, &new_value);
-        if (err)
-                return err;
+        if (!alloc_cpumask_var(&new_value, GFP_KERNEL))
+                return -ENOMEM;
 
-        *mask = new_value;
-        return full_count;
+        err = cpumask_parse_user(buffer, count, new_value);
+        if (!err) {
+                cpumask_copy(mask, new_value);
+                err = full_count;
+        }
+        free_cpumask_var(new_value);
+        return err;
 }
 
 void create_prof_cpu_mask(struct proc_dir_entry *root_irq_dir)
@@ -472,7 +484,7 @@ void create_prof_cpu_mask(struct proc_dir_entry *root_irq_dir)
         entry = create_proc_entry("prof_cpu_mask", 0600, root_irq_dir);
         if (!entry)
                 return;
-        entry->data = (void *)&prof_cpu_mask;
+        entry->data = prof_cpu_mask;
         entry->read_proc = prof_cpu_mask_read_proc;
         entry->write_proc = prof_cpu_mask_write_proc;
 }
diff --git a/kernel/rcuclassic.c b/kernel/rcuclassic.c
index c03ca3e61919..490934fc7ac3 100644
--- a/kernel/rcuclassic.c
+++ b/kernel/rcuclassic.c
@@ -63,14 +63,14 @@ static struct rcu_ctrlblk rcu_ctrlblk = {
         .completed = -300,
         .pending = -300,
         .lock = __SPIN_LOCK_UNLOCKED(&rcu_ctrlblk.lock),
-        .cpumask = CPU_MASK_NONE,
+        .cpumask = CPU_BITS_NONE,
 };
 static struct rcu_ctrlblk rcu_bh_ctrlblk = {
         .cur = -300,
         .completed = -300,
         .pending = -300,
         .lock = __SPIN_LOCK_UNLOCKED(&rcu_bh_ctrlblk.lock),
-        .cpumask = CPU_MASK_NONE,
+        .cpumask = CPU_BITS_NONE,
 };
 
 DEFINE_PER_CPU(struct rcu_data, rcu_data) = { 0L };
@@ -85,7 +85,6 @@ static void force_quiescent_state(struct rcu_data *rdp,
                         struct rcu_ctrlblk *rcp)
 {
         int cpu;
-        cpumask_t cpumask;
         unsigned long flags;
 
         set_need_resched();
@@ -96,10 +95,10 @@ static void force_quiescent_state(struct rcu_data *rdp,
                  * Don't send IPI to itself. With irqs disabled,
                  * rdp->cpu is the current cpu.
                  *
-                 * cpu_online_map is updated by the _cpu_down()
+                 * cpu_online_mask is updated by the _cpu_down()
                  * using __stop_machine(). Since we're in irqs disabled
                  * section, __stop_machine() is not exectuting, hence
-                 * the cpu_online_map is stable.
+                 * the cpu_online_mask is stable.
                  *
                  * However,  a cpu might have been offlined _just_ before
                  * we disabled irqs while entering here.
@@ -107,13 +106,14 @@ static void force_quiescent_state(struct rcu_data *rdp,
                  * notification, leading to the offlined cpu's bit
                  * being set in the rcp->cpumask.
                  *
-                 * Hence cpumask = (rcp->cpumask & cpu_online_map) to prevent
+                 * Hence cpumask = (rcp->cpumask & cpu_online_mask) to prevent
                  * sending smp_reschedule() to an offlined CPU.
                  */
-                cpus_and(cpumask, rcp->cpumask, cpu_online_map);
-                cpu_clear(rdp->cpu, cpumask);
-                for_each_cpu_mask_nr(cpu, cpumask)
-                        smp_send_reschedule(cpu);
+                for_each_cpu_and(cpu,
+                                  to_cpumask(rcp->cpumask), cpu_online_mask) {
+                        if (cpu != rdp->cpu)
+                                smp_send_reschedule(cpu);
+                }
         }
         spin_unlock_irqrestore(&rcp->lock, flags);
 }
@@ -193,7 +193,7 @@ static void print_other_cpu_stall(struct rcu_ctrlblk *rcp)
 
         printk(KERN_ERR "INFO: RCU detected CPU stalls:");
         for_each_possible_cpu(cpu) {
-                if (cpu_isset(cpu, rcp->cpumask))
+                if (cpumask_test_cpu(cpu, to_cpumask(rcp->cpumask)))
                         printk(" %d", cpu);
         }
         printk(" (detected by %d, t=%ld jiffies)\n",
@@ -221,7 +221,8 @@ static void check_cpu_stall(struct rcu_ctrlblk *rcp)
         long delta;
 
         delta = jiffies - rcp->jiffies_stall;
-        if (cpu_isset(smp_processor_id(), rcp->cpumask) && delta >= 0) {
+        if (cpumask_test_cpu(smp_processor_id(), to_cpumask(rcp->cpumask)) &&
+                delta >= 0) {
 
                 /* We haven't checked in, so go dump stack. */
                 print_cpu_stall(rcp);
@@ -393,7 +394,8 @@ static void rcu_start_batch(struct rcu_ctrlblk *rcp)
                  * unnecessarily.
                  */
                 smp_mb();
-                cpumask_andnot(&rcp->cpumask, cpu_online_mask, nohz_cpu_mask);
+                cpumask_andnot(to_cpumask(rcp->cpumask),
+                               cpu_online_mask, nohz_cpu_mask);
 
                 rcp->signaled = 0;
         }
@@ -406,8 +408,8 @@ static void rcu_start_batch(struct rcu_ctrlblk *rcp)
  */
 static void cpu_quiet(int cpu, struct rcu_ctrlblk *rcp)
 {
-        cpu_clear(cpu, rcp->cpumask);
-        if (cpus_empty(rcp->cpumask)) {
+        cpumask_clear_cpu(cpu, to_cpumask(rcp->cpumask));
+        if (cpumask_empty(to_cpumask(rcp->cpumask))) {
                 /* batch completed ! */
                 rcp->completed = rcp->cur;
                 rcu_start_batch(rcp);
diff --git a/kernel/rcupreempt.c b/kernel/rcupreempt.c
index 04982659875a..f9dc8f3720f6 100644
--- a/kernel/rcupreempt.c
+++ b/kernel/rcupreempt.c
@@ -164,7 +164,8 @@ static char *rcu_try_flip_state_names[] =
         { "idle", "waitack", "waitzero", "waitmb" };
 #endif /* #ifdef CONFIG_RCU_TRACE */
 
-static cpumask_t rcu_cpu_online_map __read_mostly = CPU_MASK_NONE;
+static DECLARE_BITMAP(rcu_cpu_online_map, NR_CPUS) __read_mostly
+        = CPU_BITS_NONE;
 
 /*
  * Enum and per-CPU flag to determine when each CPU has seen
@@ -758,7 +759,7 @@ rcu_try_flip_idle(void)
 
         /* Now ask each CPU for acknowledgement of the flip. */
 
-        for_each_cpu_mask_nr(cpu, rcu_cpu_online_map) {
+        for_each_cpu(cpu, to_cpumask(rcu_cpu_online_map)) {
                 per_cpu(rcu_flip_flag, cpu) = rcu_flipped;
                 dyntick_save_progress_counter(cpu);
         }
@@ -776,7 +777,7 @@ rcu_try_flip_waitack(void)
         int cpu;
 
         RCU_TRACE_ME(rcupreempt_trace_try_flip_a1);
-        for_each_cpu_mask_nr(cpu, rcu_cpu_online_map)
+        for_each_cpu(cpu, to_cpumask(rcu_cpu_online_map))
                 if (rcu_try_flip_waitack_needed(cpu) &&
                     per_cpu(rcu_flip_flag, cpu) != rcu_flip_seen) {
                         RCU_TRACE_ME(rcupreempt_trace_try_flip_ae1);
@@ -808,7 +809,7 @@ rcu_try_flip_waitzero(void)
         /* Check to see if the sum of the "last" counters is zero. */
 
         RCU_TRACE_ME(rcupreempt_trace_try_flip_z1);
-        for_each_cpu_mask_nr(cpu, rcu_cpu_online_map)
+        for_each_cpu(cpu, to_cpumask(rcu_cpu_online_map))
                 sum += RCU_DATA_CPU(cpu)->rcu_flipctr[lastidx];
         if (sum != 0) {
                 RCU_TRACE_ME(rcupreempt_trace_try_flip_ze1);
@@ -823,7 +824,7 @@ rcu_try_flip_waitzero(void)
         smp_mb();  /*  ^^^^^^^^^^^^ */
 
         /* Call for a memory barrier from each CPU. */
-        for_each_cpu_mask_nr(cpu, rcu_cpu_online_map) {
+        for_each_cpu(cpu, to_cpumask(rcu_cpu_online_map)) {
                 per_cpu(rcu_mb_flag, cpu) = rcu_mb_needed;
                 dyntick_save_progress_counter(cpu);
         }
@@ -843,7 +844,7 @@ rcu_try_flip_waitmb(void)
         int cpu;
 
         RCU_TRACE_ME(rcupreempt_trace_try_flip_m1);
-        for_each_cpu_mask_nr(cpu, rcu_cpu_online_map)
+        for_each_cpu(cpu, to_cpumask(rcu_cpu_online_map))
                 if (rcu_try_flip_waitmb_needed(cpu) &&
                     per_cpu(rcu_mb_flag, cpu) != rcu_mb_done) {
                         RCU_TRACE_ME(rcupreempt_trace_try_flip_me1);
@@ -1032,7 +1033,7 @@ void rcu_offline_cpu(int cpu)
         RCU_DATA_CPU(cpu)->rcu_flipctr[0] = 0;
         RCU_DATA_CPU(cpu)->rcu_flipctr[1] = 0;
 
-        cpu_clear(cpu, rcu_cpu_online_map);
+        cpumask_clear_cpu(cpu, to_cpumask(rcu_cpu_online_map));
 
         spin_unlock_irqrestore(&rcu_ctrlblk.fliplock, flags);
 
@@ -1072,7 +1073,7 @@ void __cpuinit rcu_online_cpu(int cpu)
         struct rcu_data *rdp;
 
         spin_lock_irqsave(&rcu_ctrlblk.fliplock, flags);
-        cpu_set(cpu, rcu_cpu_online_map);
+        cpumask_set_cpu(cpu, to_cpumask(rcu_cpu_online_map));
         spin_unlock_irqrestore(&rcu_ctrlblk.fliplock, flags);
 
         /*
@@ -1430,7 +1431,7 @@ void __init __rcu_init(void)
          * We don't need protection against CPU-Hotplug here
          * since
          * a) If a CPU comes online while we are iterating over the
-         *    cpu_online_map below, we would only end up making a
+         *    cpu_online_mask below, we would only end up making a
          *    duplicate call to rcu_online_cpu() which sets the corresponding
          *    CPU's mask in the rcu_cpu_online_map.
          *
diff --git a/kernel/rcutorture.c b/kernel/rcutorture.c
index b31065522104..3245b40952c6 100644
--- a/kernel/rcutorture.c
+++ b/kernel/rcutorture.c
@@ -868,49 +868,52 @@ static int rcu_idle_cpu;	/* Force all torture tasks off this CPU */
  */
 static void rcu_torture_shuffle_tasks(void)
 {
-        cpumask_t tmp_mask;
+        cpumask_var_t tmp_mask;
         int i;
 
-        cpus_setall(tmp_mask);
+        if (!alloc_cpumask_var(&tmp_mask, GFP_KERNEL))
+                BUG();
+
+        cpumask_setall(tmp_mask);
         get_online_cpus();
 
         /* No point in shuffling if there is only one online CPU (ex: UP) */
-        if (num_online_cpus() == 1) {
-                put_online_cpus();
-                return;
-        }
+        if (num_online_cpus() == 1)
+                goto out;
 
         if (rcu_idle_cpu != -1)
-                cpu_clear(rcu_idle_cpu, tmp_mask);
+                cpumask_clear_cpu(rcu_idle_cpu, tmp_mask);
 
-        set_cpus_allowed_ptr(current, &tmp_mask);
+        set_cpus_allowed_ptr(current, tmp_mask);
 
         if (reader_tasks) {
                 for (i = 0; i < nrealreaders; i++)
                         if (reader_tasks[i])
                                 set_cpus_allowed_ptr(reader_tasks[i],
-                                                     &tmp_mask);
+                                                     tmp_mask);
         }
 
         if (fakewriter_tasks) {
                 for (i = 0; i < nfakewriters; i++)
                         if (fakewriter_tasks[i])
                                 set_cpus_allowed_ptr(fakewriter_tasks[i],
-                                                     &tmp_mask);
+                                                     tmp_mask);
         }
 
         if (writer_task)
-                set_cpus_allowed_ptr(writer_task, &tmp_mask);
+                set_cpus_allowed_ptr(writer_task, tmp_mask);
 
         if (stats_task)
-                set_cpus_allowed_ptr(stats_task, &tmp_mask);
+                set_cpus_allowed_ptr(stats_task, tmp_mask);
 
         if (rcu_idle_cpu == -1)
                 rcu_idle_cpu = num_online_cpus() - 1;
         else
                 rcu_idle_cpu--;
 
+out:
         put_online_cpus();
+        free_cpumask_var(tmp_mask);
 }
 
 /* Shuffle tasks across CPUs, with the intent of allowing each CPU in the
diff --git a/kernel/sched.c b/kernel/sched.c
index 930bf2e6d714..545c6fccd1dc 100644
--- a/kernel/sched.c
+++ b/kernel/sched.c
@@ -3715,7 +3715,7 @@ redo:
                  * don't kick the migration_thread, if the curr
                  * task on busiest cpu can't be moved to this_cpu
                  */
-                if (!cpu_isset(this_cpu, busiest->curr->cpus_allowed)) {
+                if (!cpumask_test_cpu(this_cpu, &busiest->curr->cpus_allowed)) {
                         double_unlock_balance(this_rq, busiest);
                         all_pinned = 1;
                         return ld_moved;
@@ -6257,9 +6257,7 @@ static int __migrate_task_irq(struct task_struct *p, int src_cpu, int dest_cpu)
 static void move_task_off_dead_cpu(int dead_cpu, struct task_struct *p)
 {
         int dest_cpu;
-        /* FIXME: Use cpumask_of_node here. */
-        cpumask_t _nodemask = node_to_cpumask(cpu_to_node(dead_cpu));
-        const struct cpumask *nodemask = &_nodemask;
+        const struct cpumask *nodemask = cpumask_of_node(cpu_to_node(dead_cpu));
 
 again:
         /* Look for allowed, online CPU in same node. */
@@ -7170,21 +7168,18 @@ static int find_next_best_node(int node, nodemask_t *used_nodes)
 static void sched_domain_node_span(int node, struct cpumask *span)
 {
         nodemask_t used_nodes;
-        /* FIXME: use cpumask_of_node() */
-        node_to_cpumask_ptr(nodemask, node);
         int i;
 
-        cpus_clear(*span);
+        cpumask_clear(span);
         nodes_clear(used_nodes);
 
-        cpus_or(*span, *span, *nodemask);
+        cpumask_or(span, span, cpumask_of_node(node));
         node_set(node, used_nodes);
 
         for (i = 1; i < SD_NODES_PER_DOMAIN; i++) {
                 int next_node = find_next_best_node(node, &used_nodes);
 
-                node_to_cpumask_ptr_next(nodemask, next_node);
-                cpus_or(*span, *span, *nodemask);
+                cpumask_or(span, span, cpumask_of_node(next_node));
         }
 }
 #endif /* CONFIG_NUMA */
@@ -7264,9 +7259,7 @@ cpu_to_phys_group(int cpu, const struct cpumask *cpu_map,
 {
         int group;
 #ifdef CONFIG_SCHED_MC
-        /* FIXME: Use cpu_coregroup_mask. */
-        *mask = cpu_coregroup_map(cpu);
-        cpus_and(*mask, *mask, *cpu_map);
+        cpumask_and(mask, cpu_coregroup_mask(cpu), cpu_map);
         group = cpumask_first(mask);
 #elif defined(CONFIG_SCHED_SMT)
         cpumask_and(mask, &per_cpu(cpu_sibling_map, cpu), cpu_map);
@@ -7296,10 +7289,8 @@ static int cpu_to_allnodes_group(int cpu, const struct cpumask *cpu_map,
                                  struct cpumask *nodemask)
 {
         int group;
-        /* FIXME: use cpumask_of_node */
-        node_to_cpumask_ptr(pnodemask, cpu_to_node(cpu));
 
-        cpumask_and(nodemask, pnodemask, cpu_map);
+        cpumask_and(nodemask, cpumask_of_node(cpu_to_node(cpu)), cpu_map);
         group = cpumask_first(nodemask);
 
         if (sg)
@@ -7350,10 +7341,8 @@ static void free_sched_groups(const struct cpumask *cpu_map,
 
                 for (i = 0; i < nr_node_ids; i++) {
                         struct sched_group *oldsg, *sg = sched_group_nodes[i];
-                        /* FIXME: Use cpumask_of_node */
-                        node_to_cpumask_ptr(pnodemask, i);
 
-                        cpus_and(*nodemask, *pnodemask, *cpu_map);
+                        cpumask_and(nodemask, cpumask_of_node(i), cpu_map);
                         if (cpumask_empty(nodemask))
                                 continue;
 
@@ -7562,9 +7551,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
         for_each_cpu(i, cpu_map) {
                 struct sched_domain *sd = NULL, *p;
 
-                /* FIXME: use cpumask_of_node */
-                *nodemask = node_to_cpumask(cpu_to_node(i));
-                cpus_and(*nodemask, *nodemask, *cpu_map);
+                cpumask_and(nodemask, cpumask_of_node(cpu_to_node(i)), cpu_map);
 
 #ifdef CONFIG_NUMA
                 if (cpumask_weight(cpu_map) >
@@ -7605,9 +7592,8 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
                 sd = &per_cpu(core_domains, i).sd;
                 SD_INIT(sd, MC);
                 set_domain_attribute(sd, attr);
-                *sched_domain_span(sd) = cpu_coregroup_map(i);
-                cpumask_and(sched_domain_span(sd),
-                            sched_domain_span(sd), cpu_map);
+                cpumask_and(sched_domain_span(sd), cpu_map,
+                                                   cpu_coregroup_mask(i));
                 sd->parent = p;
                 p->child = sd;
                 cpu_to_core_group(i, cpu_map, &sd->groups, tmpmask);
@@ -7643,9 +7629,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
 #ifdef CONFIG_SCHED_MC
         /* Set up multi-core groups */
         for_each_cpu(i, cpu_map) {
-                /* FIXME: Use cpu_coregroup_mask */
-                *this_core_map = cpu_coregroup_map(i);
-                cpus_and(*this_core_map, *this_core_map, *cpu_map);
+                cpumask_and(this_core_map, cpu_coregroup_mask(i), cpu_map);
                 if (i != cpumask_first(this_core_map))
                         continue;
 
@@ -7657,9 +7641,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
 
         /* Set up physical groups */
         for (i = 0; i < nr_node_ids; i++) {
-                /* FIXME: Use cpumask_of_node */
-                *nodemask = node_to_cpumask(i);
-                cpus_and(*nodemask, *nodemask, *cpu_map);
+                cpumask_and(nodemask, cpumask_of_node(i), cpu_map);
                 if (cpumask_empty(nodemask))
                         continue;
 
@@ -7681,11 +7663,8 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
                 struct sched_group *sg, *prev;
                 int j;
 
-                /* FIXME: Use cpumask_of_node */
-                *nodemask = node_to_cpumask(i);
                 cpumask_clear(covered);
-
-                cpus_and(*nodemask, *nodemask, *cpu_map);
+                cpumask_and(nodemask, cpumask_of_node(i), cpu_map);
                 if (cpumask_empty(nodemask)) {
                         sched_group_nodes[i] = NULL;
                         continue;
@@ -7716,8 +7695,6 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
 
                 for (j = 0; j < nr_node_ids; j++) {
                         int n = (i + j) % nr_node_ids;
-                        /* FIXME: Use cpumask_of_node */
-                        node_to_cpumask_ptr(pnodemask, n);
 
                         cpumask_complement(notcovered, covered);
                         cpumask_and(tmpmask, notcovered, cpu_map);
@@ -7725,7 +7702,7 @@ static int __build_sched_domains(const struct cpumask *cpu_map,
                         if (cpumask_empty(tmpmask))
                                 break;
 
-                        cpumask_and(tmpmask, tmpmask, pnodemask);
+                        cpumask_and(tmpmask, tmpmask, cpumask_of_node(n));
                         if (cpumask_empty(tmpmask))
                                 continue;
 
diff --git a/kernel/sched_rt.c b/kernel/sched_rt.c
index 833b6d44483c..954e1a81b796 100644
--- a/kernel/sched_rt.c
+++ b/kernel/sched_rt.c
@@ -1383,7 +1383,8 @@ static inline void init_sched_rt_class(void)
         unsigned int i;
 
         for_each_possible_cpu(i)
-                alloc_cpumask_var(&per_cpu(local_cpu_mask, i), GFP_KERNEL);
+                alloc_cpumask_var_node(&per_cpu(local_cpu_mask, i),
+                                        GFP_KERNEL, cpu_to_node(i));
 }
 #endif /* CONFIG_SMP */
 
diff --git a/kernel/smp.c b/kernel/smp.c
index 75c8dde58c55..5cfa0e5e3e88 100644
--- a/kernel/smp.c
+++ b/kernel/smp.c
@@ -24,8 +24,8 @@ struct call_function_data {
         struct call_single_data csd;
         spinlock_t lock;
         unsigned int refs;
-        cpumask_t cpumask;
         struct rcu_head rcu_head;
+        unsigned long cpumask_bits[];
 };
 
 struct call_single_queue {
@@ -110,13 +110,13 @@ void generic_smp_call_function_interrupt(void)
         list_for_each_entry_rcu(data, &call_function_queue, csd.list) {
                 int refs;
 
-                if (!cpu_isset(cpu, data->cpumask))
+                if (!cpumask_test_cpu(cpu, to_cpumask(data->cpumask_bits)))
                         continue;
 
                 data->csd.func(data->csd.info);
 
                 spin_lock(&data->lock);
-                cpu_clear(cpu, data->cpumask);
+                cpumask_clear_cpu(cpu, to_cpumask(data->cpumask_bits));
                 WARN_ON(data->refs == 0);
                 data->refs--;
                 refs = data->refs;
@@ -223,7 +223,7 @@ int smp_call_function_single(int cpu, void (*func) (void *info), void *info,
                 local_irq_save(flags);
                 func(info);
                 local_irq_restore(flags);
-        } else if ((unsigned)cpu < NR_CPUS && cpu_online(cpu)) {
+        } else if ((unsigned)cpu < nr_cpu_ids && cpu_online(cpu)) {
                 struct call_single_data *data = NULL;
 
                 if (!wait) {
@@ -266,51 +266,19 @@ void __smp_call_function_single(int cpu, struct call_single_data *data)
         generic_exec_single(cpu, data);
 }
 
-/* Dummy function */
-static void quiesce_dummy(void *unused)
-{
-}
-
-/*
- * Ensure stack based data used in call function mask is safe to free.
- *
- * This is needed by smp_call_function_mask when using on-stack data, because
- * a single call function queue is shared by all CPUs, and any CPU may pick up
- * the data item on the queue at any time before it is deleted. So we need to
- * ensure that all CPUs have transitioned through a quiescent state after
- * this call.
- *
- * This is a very slow function, implemented by sending synchronous IPIs to
- * all possible CPUs. For this reason, we have to alloc data rather than use
- * stack based data even in the case of synchronous calls. The stack based
- * data is then just used for deadlock/oom fallback which will be very rare.
- *
- * If a faster scheme can be made, we could go back to preferring stack based
- * data -- the data allocation/free is non-zero cost.
- */
-static void smp_call_function_mask_quiesce_stack(cpumask_t mask)
-{
-        struct call_single_data data;
-        int cpu;
-
-        data.func = quiesce_dummy;
-        data.info = NULL;
-
-        for_each_cpu_mask(cpu, mask) {
-                data.flags = CSD_FLAG_WAIT;
-                generic_exec_single(cpu, &data);
-        }
-}
+/* FIXME: Shim for archs using old arch_send_call_function_ipi API. */
+#ifndef arch_send_call_function_ipi_mask
+#define arch_send_call_function_ipi_mask(maskp) \
+        arch_send_call_function_ipi(*(maskp))
+#endif
 
 /**
- * smp_call_function_mask(): Run a function on a set of other CPUs.
- * @mask: The set of cpus to run on.
+ * smp_call_function_many(): Run a function on a set of other CPUs.
+ * @mask: The set of cpus to run on (only runs on online subset).
  * @func: The function to run. This must be fast and non-blocking.
  * @info: An arbitrary pointer to pass to the function.
  * @wait: If true, wait (atomically) until function has completed on other CPUs.
  *
- * Returns 0 on success, else a negative status code.
- *
  * If @wait is true, then returns once @func has returned. Note that @wait
  * will be implicitly turned on in case of allocation failures, since
  * we fall back to on-stack allocation.
@@ -319,53 +287,57 @@ static void smp_call_function_mask_quiesce_stack(cpumask_t mask)
  * hardware interrupt handler or from a bottom half handler. Preemption
  * must be disabled when calling this function.
  */
-int smp_call_function_mask(cpumask_t mask, void (*func)(void *), void *info,
-                           int wait)
+void smp_call_function_many(const struct cpumask *mask,
+                            void (*func)(void *), void *info,
+                            bool wait)
 {
-        struct call_function_data d;
-        struct call_function_data *data = NULL;
-        cpumask_t allbutself;
+        struct call_function_data *data;
         unsigned long flags;
-        int cpu, num_cpus;
-        int slowpath = 0;
+        int cpu, next_cpu;
 
         /* Can deadlock when called with interrupts disabled */
         WARN_ON(irqs_disabled());
 
-        cpu = smp_processor_id();
-        allbutself = cpu_online_map;
-        cpu_clear(cpu, allbutself);
-        cpus_and(mask, mask, allbutself);
-        num_cpus = cpus_weight(mask);
-
-        /*
-         * If zero CPUs, return. If just a single CPU, turn this request
-         * into a targetted single call instead since it's faster.
-         */
-        if (!num_cpus)
-                return 0;
-        else if (num_cpus == 1) {
-                cpu = first_cpu(mask);
-                return smp_call_function_single(cpu, func, info, wait);
+        /* So, what's a CPU they want?  Ignoring this one. */
+        cpu = cpumask_first_and(mask, cpu_online_mask);
+        if (cpu == smp_processor_id())
+                cpu = cpumask_next_and(cpu, mask, cpu_online_mask);
+        /* No online cpus?  We're done. */
+        if (cpu >= nr_cpu_ids)
+                return;
+
+        /* Do we have another CPU which isn't us? */
+        next_cpu = cpumask_next_and(cpu, mask, cpu_online_mask);
+        if (next_cpu == smp_processor_id())
+                next_cpu = cpumask_next_and(next_cpu, mask, cpu_online_mask);
+
+        /* Fastpath: do that cpu by itself. */
+        if (next_cpu >= nr_cpu_ids) {
+                smp_call_function_single(cpu, func, info, wait);
+                return;
         }
 
-        data = kmalloc(sizeof(*data), GFP_ATOMIC);
-        if (data) {
-                data->csd.flags = CSD_FLAG_ALLOC;
-                if (wait)
-                        data->csd.flags |= CSD_FLAG_WAIT;
-        } else {
-                data = &d;
-                data->csd.flags = CSD_FLAG_WAIT;
-                wait = 1;
-                slowpath = 1;
+        data = kmalloc(sizeof(*data) + cpumask_size(), GFP_ATOMIC);
+        if (unlikely(!data)) {
+                /* Slow path. */
+                for_each_online_cpu(cpu) {
+                        if (cpu == smp_processor_id())
+                                continue;
+                        if (cpumask_test_cpu(cpu, mask))
+                                smp_call_function_single(cpu, func, info, wait);
+                }
+                return;
         }
 
         spin_lock_init(&data->lock);
+        data->csd.flags = CSD_FLAG_ALLOC;
+        if (wait)
+                data->csd.flags |= CSD_FLAG_WAIT;
         data->csd.func = func;
         data->csd.info = info;
-        data->refs = num_cpus;
-        data->cpumask = mask;
+        cpumask_and(to_cpumask(data->cpumask_bits), mask, cpu_online_mask);
+        cpumask_clear_cpu(smp_processor_id(), to_cpumask(data->cpumask_bits));
+        data->refs = cpumask_weight(to_cpumask(data->cpumask_bits));
 
         spin_lock_irqsave(&call_function_lock, flags);
         list_add_tail_rcu(&data->csd.list, &call_function_queue);
@@ -377,18 +349,13 @@ int smp_call_function_mask(cpumask_t mask, void (*func)(void *), void *info,
         smp_mb();
 
         /* Send a message to all CPUs in the map */
-        arch_send_call_function_ipi(mask);
+        arch_send_call_function_ipi_mask(to_cpumask(data->cpumask_bits));
 
         /* optionally wait for the CPUs to complete */
-        if (wait) {
+        if (wait)
                 csd_flag_wait(&data->csd);
-                if (unlikely(slowpath))
-                        smp_call_function_mask_quiesce_stack(mask);
-        }
-
-        return 0;
 }
-EXPORT_SYMBOL(smp_call_function_mask);
+EXPORT_SYMBOL(smp_call_function_many);
 
 /**
  * smp_call_function(): Run a function on all other CPUs.
@@ -396,7 +363,7 @@ EXPORT_SYMBOL(smp_call_function_mask);
  * @info: An arbitrary pointer to pass to the function.
  * @wait: If true, wait (atomically) until function has completed on other CPUs.
  *
- * Returns 0 on success, else a negative status code.
+ * Returns 0.
  *
  * If @wait is true, then returns once @func has returned; otherwise
  * it returns just before the target cpu calls @func. In case of allocation
@@ -407,12 +374,10 @@ EXPORT_SYMBOL(smp_call_function_mask);
  */
 int smp_call_function(void (*func)(void *), void *info, int wait)
 {
-        int ret;
-
         preempt_disable();
-        ret = smp_call_function_mask(cpu_online_map, func, info, wait);
+        smp_call_function_many(cpu_online_mask, func, info, wait);
         preempt_enable();
-        return ret;
+        return 0;
 }
 EXPORT_SYMBOL(smp_call_function);
 
diff --git a/kernel/softirq.c b/kernel/softirq.c
index 670c1eca47ec..bdbe9de9cd8d 100644
--- a/kernel/softirq.c
+++ b/kernel/softirq.c
@@ -733,7 +733,7 @@ static int __cpuinit cpu_callback(struct notifier_block *nfb,
                         break;
                 /* Unbind so it can run.  Fall thru. */
                 kthread_bind(per_cpu(ksoftirqd, hotcpu),
-                             any_online_cpu(cpu_online_map));
+                             cpumask_any(cpu_online_mask));
         case CPU_DEAD:
         case CPU_DEAD_FROZEN: {
                 struct sched_param param = { .sched_priority = MAX_RT_PRIO-1 };
diff --git a/kernel/softlockup.c b/kernel/softlockup.c
index 1ab790c67b17..d9188c66278a 100644
--- a/kernel/softlockup.c
+++ b/kernel/softlockup.c
@@ -303,17 +303,15 @@ cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
                 break;
         case CPU_ONLINE:
         case CPU_ONLINE_FROZEN:
-                check_cpu = any_online_cpu(cpu_online_map);
+                check_cpu = cpumask_any(cpu_online_mask);
                 wake_up_process(per_cpu(watchdog_task, hotcpu));
                 break;
 #ifdef CONFIG_HOTPLUG_CPU
         case CPU_DOWN_PREPARE:
         case CPU_DOWN_PREPARE_FROZEN:
                 if (hotcpu == check_cpu) {
-                        cpumask_t temp_cpu_online_map = cpu_online_map;
-
-                        cpu_clear(hotcpu, temp_cpu_online_map);
-                        check_cpu = any_online_cpu(temp_cpu_online_map);
+                        /* Pick any other online cpu. */
+                        check_cpu = cpumask_any_but(cpu_online_mask, hotcpu);
                 }
                 break;
 
@@ -323,7 +321,7 @@ cpu_callback(struct notifier_block *nfb, unsigned long action, void *hcpu)
                         break;
                 /* Unbind so it can run.  Fall thru. */
                 kthread_bind(per_cpu(watchdog_task, hotcpu),
-                             any_online_cpu(cpu_online_map));
+                             cpumask_any(cpu_online_mask));
         case CPU_DEAD:
         case CPU_DEAD_FROZEN:
                 p = per_cpu(watchdog_task, hotcpu);
diff --git a/kernel/stop_machine.c b/kernel/stop_machine.c
index 24e8ceacc388..286c41722e8c 100644
--- a/kernel/stop_machine.c
+++ b/kernel/stop_machine.c
@@ -69,10 +69,10 @@ static void stop_cpu(struct work_struct *unused)
         int err;
 
         if (!active_cpus) {
-                if (cpu == first_cpu(cpu_online_map))
+                if (cpu == cpumask_first(cpu_online_mask))
                         smdata = &active;
         } else {
-                if (cpu_isset(cpu, *active_cpus))
+                if (cpumask_test_cpu(cpu, active_cpus))
                         smdata = &active;
         }
         /* Simple state machine */
@@ -109,7 +109,7 @@ static int chill(void *unused)
         return 0;
 }
 
-int __stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus)
+int __stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus)
 {
         struct work_struct *sm_work;
         int i, ret;
@@ -142,7 +142,7 @@ int __stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus)
         return ret;
 }
 
-int stop_machine(int (*fn)(void *), void *data, const cpumask_t *cpus)
+int stop_machine(int (*fn)(void *), void *data, const struct cpumask *cpus)
 {
         int ret;
 
diff --git a/kernel/taskstats.c b/kernel/taskstats.c
index 6d7dc4ec4aa5..888adbcca30c 100644
--- a/kernel/taskstats.c
+++ b/kernel/taskstats.c
@@ -290,18 +290,17 @@ ret:
         return;
 }
 
-static int add_del_listener(pid_t pid, cpumask_t *maskp, int isadd)
+static int add_del_listener(pid_t pid, const struct cpumask *mask, int isadd)
 {
         struct listener_list *listeners;
         struct listener *s, *tmp;
         unsigned int cpu;
-        cpumask_t mask = *maskp;
 
-        if (!cpus_subset(mask, cpu_possible_map))
+        if (!cpumask_subset(mask, cpu_possible_mask))
                 return -EINVAL;
 
         if (isadd == REGISTER) {
-                for_each_cpu_mask_nr(cpu, mask) {
+                for_each_cpu(cpu, mask) {
                         s = kmalloc_node(sizeof(struct listener), GFP_KERNEL,
                                          cpu_to_node(cpu));
                         if (!s)
@@ -320,7 +319,7 @@ static int add_del_listener(pid_t pid, cpumask_t *maskp, int isadd)
 
         /* Deregister or cleanup */
 cleanup:
-        for_each_cpu_mask_nr(cpu, mask) {
+        for_each_cpu(cpu, mask) {
                 listeners = &per_cpu(listener_array, cpu);
                 down_write(&listeners->sem);
                 list_for_each_entry_safe(s, tmp, &listeners->list, list) {
@@ -335,7 +334,7 @@ cleanup:
         return 0;
 }
 
-static int parse(struct nlattr *na, cpumask_t *mask)
+static int parse(struct nlattr *na, struct cpumask *mask)
 {
         char *data;
         int len;
@@ -428,23 +427,33 @@ err:
 
 static int taskstats_user_cmd(struct sk_buff *skb, struct genl_info *info)
 {
-        int rc = 0;
+        int rc;
         struct sk_buff *rep_skb;
         struct taskstats *stats;
         size_t size;
-        cpumask_t mask;
+        cpumask_var_t mask;
+
+        if (!alloc_cpumask_var(&mask, GFP_KERNEL))
+                return -ENOMEM;
 
-        rc = parse(info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK], &mask);
+        rc = parse(info->attrs[TASKSTATS_CMD_ATTR_REGISTER_CPUMASK], mask);
         if (rc < 0)
-                return rc;
-        if (rc == 0)
-                return add_del_listener(info->snd_pid, &mask, REGISTER);
+                goto free_return_rc;
+        if (rc == 0) {
+                rc = add_del_listener(info->snd_pid, mask, REGISTER);
+                goto free_return_rc;
+        }
 
-        rc = parse(info->attrs[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK], &mask);
+        rc = parse(info->attrs[TASKSTATS_CMD_ATTR_DEREGISTER_CPUMASK], mask);
         if (rc < 0)
+                goto free_return_rc;
+        if (rc == 0) {
+                rc = add_del_listener(info->snd_pid, mask, DEREGISTER);
+free_return_rc:
+                free_cpumask_var(mask);
                 return rc;
-        if (rc == 0)
-                return add_del_listener(info->snd_pid, &mask, DEREGISTER);
+        }
+        free_cpumask_var(mask);
 
         /*
          * Size includes space for nested attributes
diff --git a/kernel/time/clocksource.c b/kernel/time/clocksource.c
index 9ed2eec97526..ca89e1593f08 100644
--- a/kernel/time/clocksource.c
+++ b/kernel/time/clocksource.c
@@ -145,10 +145,11 @@ static void clocksource_watchdog(unsigned long data)
                  * Cycle through CPUs to check if the CPUs stay
                  * synchronized to each other.
                  */
-                int next_cpu = next_cpu_nr(raw_smp_processor_id(), cpu_online_map);
+                int next_cpu = cpumask_next(raw_smp_processor_id(),
+                                            cpu_online_mask);
 
                 if (next_cpu >= nr_cpu_ids)
-                        next_cpu = first_cpu(cpu_online_map);
+                        next_cpu = cpumask_first(cpu_online_mask);
                 watchdog_timer.expires += WATCHDOG_INTERVAL;
                 add_timer_on(&watchdog_timer, next_cpu);
         }
@@ -173,7 +174,7 @@ static void clocksource_check_watchdog(struct clocksource *cs)
                         watchdog_last = watchdog->read();
                         watchdog_timer.expires = jiffies + WATCHDOG_INTERVAL;
                         add_timer_on(&watchdog_timer,
-                                     first_cpu(cpu_online_map));
+                                     cpumask_first(cpu_online_mask));
                 }
         } else {
                 if (cs->flags & CLOCK_SOURCE_IS_CONTINUOUS)
@@ -195,7 +196,7 @@ static void clocksource_check_watchdog(struct clocksource *cs)
                                 watchdog_timer.expires =
                                         jiffies + WATCHDOG_INTERVAL;
                                 add_timer_on(&watchdog_timer,
-                                             first_cpu(cpu_online_map));
+                                             cpumask_first(cpu_online_mask));
                         }
                 }
         }
diff --git a/kernel/time/tick-broadcast.c b/kernel/time/tick-broadcast.c
index 9590af2327be..118a3b3b3f9a 100644
--- a/kernel/time/tick-broadcast.c
+++ b/kernel/time/tick-broadcast.c
@@ -28,7 +28,9 @@
  */
 
 struct tick_device tick_broadcast_device;
-static cpumask_t tick_broadcast_mask;
+/* FIXME: Use cpumask_var_t. */
+static DECLARE_BITMAP(tick_broadcast_mask, NR_CPUS);
+static DECLARE_BITMAP(tmpmask, NR_CPUS);
 static DEFINE_SPINLOCK(tick_broadcast_lock);
 static int tick_broadcast_force;
 
@@ -46,9 +48,9 @@ struct tick_device *tick_get_broadcast_device(void)
         return &tick_broadcast_device;
 }
 
-cpumask_t *tick_get_broadcast_mask(void)
+struct cpumask *tick_get_broadcast_mask(void)
 {
-        return &tick_broadcast_mask;
+        return to_cpumask(tick_broadcast_mask);
 }
 
 /*
@@ -72,7 +74,7 @@ int tick_check_broadcast_device(struct clock_event_device *dev)
 
         clockevents_exchange_device(NULL, dev);
         tick_broadcast_device.evtdev = dev;
-        if (!cpus_empty(tick_broadcast_mask))
+        if (!cpumask_empty(tick_get_broadcast_mask()))
                 tick_broadcast_start_periodic(dev);
         return 1;
 }
@@ -104,7 +106,7 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
          */
         if (!tick_device_is_functional(dev)) {
                 dev->event_handler = tick_handle_periodic;
-                cpu_set(cpu, tick_broadcast_mask);
+                cpumask_set_cpu(cpu, tick_get_broadcast_mask());
                 tick_broadcast_start_periodic(tick_broadcast_device.evtdev);
                 ret = 1;
         } else {
@@ -116,7 +118,7 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
                 if (!(dev->features & CLOCK_EVT_FEAT_C3STOP)) {
                         int cpu = smp_processor_id();
 
-                        cpu_clear(cpu, tick_broadcast_mask);
+                        cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
                         tick_broadcast_clear_oneshot(cpu);
                 }
         }
@@ -125,9 +127,9 @@ int tick_device_uses_broadcast(struct clock_event_device *dev, int cpu)
 }
 
 /*
- * Broadcast the event to the cpus, which are set in the mask
+ * Broadcast the event to the cpus, which are set in the mask (mangled).
  */
-static void tick_do_broadcast(cpumask_t mask)
+static void tick_do_broadcast(struct cpumask *mask)
 {
         int cpu = smp_processor_id();
         struct tick_device *td;
@@ -135,22 +137,21 @@ static void tick_do_broadcast(cpumask_t mask)
         /*
          * Check, if the current cpu is in the mask
          */
-        if (cpu_isset(cpu, mask)) {
-                cpu_clear(cpu, mask);
+        if (cpumask_test_cpu(cpu, mask)) {
+                cpumask_clear_cpu(cpu, mask);
                 td = &per_cpu(tick_cpu_device, cpu);
                 td->evtdev->event_handler(td->evtdev);
         }
 
-        if (!cpus_empty(mask)) {
+        if (!cpumask_empty(mask)) {
                 /*
                  * It might be necessary to actually check whether the devices
                  * have different broadcast functions. For now, just use the
                  * one of the first device. This works as long as we have this
                  * misfeature only on x86 (lapic)
                  */
-                cpu = first_cpu(mask);
-                td = &per_cpu(tick_cpu_device, cpu);
-                td->evtdev->broadcast(&mask);
+                td = &per_cpu(tick_cpu_device, cpumask_first(mask));
+                td->evtdev->broadcast(mask);
         }
 }
 
@@ -160,12 +161,11 @@ static void tick_do_broadcast(cpumask_t mask)
  */
 static void tick_do_periodic_broadcast(void)
 {
-        cpumask_t mask;
-
         spin_lock(&tick_broadcast_lock);
 
-        cpus_and(mask, cpu_online_map, tick_broadcast_mask);
-        tick_do_broadcast(mask);
+        cpumask_and(to_cpumask(tmpmask),
+                    cpu_online_mask, tick_get_broadcast_mask());
+        tick_do_broadcast(to_cpumask(tmpmask));
 
         spin_unlock(&tick_broadcast_lock);
 }
@@ -228,13 +228,13 @@ static void tick_do_broadcast_on_off(void *why)
         if (!tick_device_is_functional(dev))
                 goto out;
 
-        bc_stopped = cpus_empty(tick_broadcast_mask);
+        bc_stopped = cpumask_empty(tick_get_broadcast_mask());
 
         switch (*reason) {
         case CLOCK_EVT_NOTIFY_BROADCAST_ON:
         case CLOCK_EVT_NOTIFY_BROADCAST_FORCE:
-                if (!cpu_isset(cpu, tick_broadcast_mask)) {
-                        cpu_set(cpu, tick_broadcast_mask);
+                if (!cpumask_test_cpu(cpu, tick_get_broadcast_mask())) {
+                        cpumask_set_cpu(cpu, tick_get_broadcast_mask());
                         if (tick_broadcast_device.mode ==
                             TICKDEV_MODE_PERIODIC)
                                 clockevents_shutdown(dev);
@@ -244,8 +244,8 @@ static void tick_do_broadcast_on_off(void *why)
                 break;
         case CLOCK_EVT_NOTIFY_BROADCAST_OFF:
                 if (!tick_broadcast_force &&
-                    cpu_isset(cpu, tick_broadcast_mask)) {
-                        cpu_clear(cpu, tick_broadcast_mask);
+                    cpumask_test_cpu(cpu, tick_get_broadcast_mask())) {
+                        cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
                         if (tick_broadcast_device.mode ==
                             TICKDEV_MODE_PERIODIC)
                                 tick_setup_periodic(dev, 0);
@@ -253,7 +253,7 @@ static void tick_do_broadcast_on_off(void *why)
                 break;
         }
 
-        if (cpus_empty(tick_broadcast_mask)) {
+        if (cpumask_empty(tick_get_broadcast_mask())) {
                 if (!bc_stopped)
                         clockevents_shutdown(bc);
         } else if (bc_stopped) {
@@ -272,7 +272,7 @@ out:
  */
 void tick_broadcast_on_off(unsigned long reason, int *oncpu)
 {
-        if (!cpu_isset(*oncpu, cpu_online_map))
+        if (!cpumask_test_cpu(*oncpu, cpu_online_mask))
                 printk(KERN_ERR "tick-broadcast: ignoring broadcast for "
                        "offline CPU #%d\n", *oncpu);
         else
@@ -303,10 +303,10 @@ void tick_shutdown_broadcast(unsigned int *cpup)
         spin_lock_irqsave(&tick_broadcast_lock, flags);
 
         bc = tick_broadcast_device.evtdev;
-        cpu_clear(cpu, tick_broadcast_mask);
+        cpumask_clear_cpu(cpu, tick_get_broadcast_mask());
 
         if (tick_broadcast_device.mode == TICKDEV_MODE_PERIODIC) {
-                if (bc && cpus_empty(tick_broadcast_mask))
+                if (bc && cpumask_empty(tick_get_broadcast_mask()))
                         clockevents_shutdown(bc);
         }
 
@@ -342,10 +342,10 @@ int tick_resume_broadcast(void)
 
                 switch (tick_broadcast_device.mode) {
                 case TICKDEV_MODE_PERIODIC:
-                        if(!cpus_empty(tick_broadcast_mask))
+                        if (!cpumask_empty(tick_get_broadcast_mask()))
                                 tick_broadcast_start_periodic(bc);
-                        broadcast = cpu_isset(smp_processor_id(),
-                                              tick_broadcast_mask);
+                        broadcast = cpumask_test_cpu(smp_processor_id(),
+                                                     tick_get_broadcast_mask());
                         break;
                 case TICKDEV_MODE_ONESHOT:
                         broadcast = tick_resume_broadcast_oneshot(bc);
@@ -360,14 +360,15 @@ int tick_resume_broadcast(void)
 
 #ifdef CONFIG_TICK_ONESHOT
 
-static cpumask_t tick_broadcast_oneshot_mask;
+/* FIXME: use cpumask_var_t. */
+static DECLARE_BITMAP(tick_broadcast_oneshot_mask, NR_CPUS);
 
 /*
- * Debugging: see timer_list.c
+ * Exposed for debugging: see timer_list.c
  */
-cpumask_t *tick_get_broadcast_oneshot_mask(void)
+struct cpumask *tick_get_broadcast_oneshot_mask(void)
 {
-        return &tick_broadcast_oneshot_mask;
+        return to_cpumask(tick_broadcast_oneshot_mask);
 }
 
 static int tick_broadcast_set_event(ktime_t expires, int force)
@@ -389,7 +390,7 @@ int tick_resume_broadcast_oneshot(struct clock_event_device *bc)
  */
 void tick_check_oneshot_broadcast(int cpu)
 {
-        if (cpu_isset(cpu, tick_broadcast_oneshot_mask)) {
+        if (cpumask_test_cpu(cpu, to_cpumask(tick_broadcast_oneshot_mask))) {
                 struct tick_device *td = &per_cpu(tick_cpu_device, cpu);
 
                 clockevents_set_mode(td->evtdev, CLOCK_EVT_MODE_ONESHOT);
@@ -402,7 +403,6 @@ void tick_check_oneshot_broadcast(int cpu)
 static void tick_handle_oneshot_broadcast(struct clock_event_device *dev)
 {
         struct tick_device *td;
-        cpumask_t mask;
         ktime_t now, next_event;
         int cpu;
 
@@ -410,13 +410,13 @@ static void tick_handle_oneshot_broadcast(struct clock_event_device *dev)
 again:
         dev->next_event.tv64 = KTIME_MAX;
         next_event.tv64 = KTIME_MAX;
-        mask = CPU_MASK_NONE;
+        cpumask_clear(to_cpumask(tmpmask));
         now = ktime_get();
         /* Find all expired events */
-        for_each_cpu_mask_nr(cpu, tick_broadcast_oneshot_mask) {
+        for_each_cpu(cpu, tick_get_broadcast_oneshot_mask()) {
                 td = &per_cpu(tick_cpu_device, cpu);
                 if (td->evtdev->next_event.tv64 <= now.tv64)
-                        cpu_set(cpu, mask);
+                        cpumask_set_cpu(cpu, to_cpumask(tmpmask));
                 else if (td->evtdev->next_event.tv64 < next_event.tv64)
                         next_event.tv64 = td->evtdev->next_event.tv64;
         }
@@ -424,7 +424,7 @@ again:
         /*
          * Wakeup the cpus which have an expired event.
          */
-        tick_do_broadcast(mask);
+        tick_do_broadcast(to_cpumask(tmpmask));
 
         /*
          * Two reasons for reprogram:
@@ -476,15 +476,16 @@ void tick_broadcast_oneshot_control(unsigned long reason)
                 goto out;
 
         if (reason == CLOCK_EVT_NOTIFY_BROADCAST_ENTER) {
-                if (!cpu_isset(cpu, tick_broadcast_oneshot_mask)) {
-                        cpu_set(cpu, tick_broadcast_oneshot_mask);
+                if (!cpumask_test_cpu(cpu, tick_get_broadcast_oneshot_mask())) {
+                        cpumask_set_cpu(cpu, tick_get_broadcast_oneshot_mask());
                         clockevents_set_mode(dev, CLOCK_EVT_MODE_SHUTDOWN);
                         if (dev->next_event.tv64 < bc->next_event.tv64)
                                 tick_broadcast_set_event(dev->next_event, 1);
                 }
         } else {
-                if (cpu_isset(cpu, tick_broadcast_oneshot_mask)) {
-                        cpu_clear(cpu, tick_broadcast_oneshot_mask);
+                if (cpumask_test_cpu(cpu, tick_get_broadcast_oneshot_mask())) {
+                        cpumask_clear_cpu(cpu,
+                                          tick_get_broadcast_oneshot_mask());
                         clockevents_set_mode(dev, CLOCK_EVT_MODE_ONESHOT);
                         if (dev->next_event.tv64 != KTIME_MAX)
                                 tick_program_event(dev->next_event, 1);
@@ -502,15 +503,16 @@ out:
  */
 static void tick_broadcast_clear_oneshot(int cpu)
 {
-        cpu_clear(cpu, tick_broadcast_oneshot_mask);
+        cpumask_clear_cpu(cpu, tick_get_broadcast_oneshot_mask());
 }
 
-static void tick_broadcast_init_next_event(cpumask_t *mask, ktime_t expires)
+static void tick_broadcast_init_next_event(struct cpumask *mask,
+                                           ktime_t expires)
 {
         struct tick_device *td;
         int cpu;
 
-        for_each_cpu_mask_nr(cpu, *mask) {
+        for_each_cpu(cpu, mask) {
                 td = &per_cpu(tick_cpu_device, cpu);
                 if (td->evtdev)
                         td->evtdev->next_event = expires;
@@ -526,7 +528,6 @@ void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
         if (bc->event_handler != tick_handle_oneshot_broadcast) {
                 int was_periodic = bc->mode == CLOCK_EVT_MODE_PERIODIC;
                 int cpu = smp_processor_id();
-                cpumask_t mask;
 
                 bc->event_handler = tick_handle_oneshot_broadcast;
                 clockevents_set_mode(bc, CLOCK_EVT_MODE_ONESHOT);
@@ -540,13 +541,15 @@ void tick_broadcast_setup_oneshot(struct clock_event_device *bc)
                  * oneshot_mask bits for those and program the
                  * broadcast device to fire.
                  */
-                mask = tick_broadcast_mask;
-                cpu_clear(cpu, mask);
-                cpus_or(tick_broadcast_oneshot_mask,
-                        tick_broadcast_oneshot_mask, mask);
-
-                if (was_periodic && !cpus_empty(mask)) {
-                        tick_broadcast_init_next_event(&mask, tick_next_period);
+                cpumask_copy(to_cpumask(tmpmask), tick_get_broadcast_mask());
+                cpumask_clear_cpu(cpu, to_cpumask(tmpmask));
+                cpumask_or(tick_get_broadcast_oneshot_mask(),
+                           tick_get_broadcast_oneshot_mask(),
+                           to_cpumask(tmpmask));
+
+                if (was_periodic && !cpumask_empty(to_cpumask(tmpmask))) {
+                        tick_broadcast_init_next_event(to_cpumask(tmpmask),
+                                                       tick_next_period);
                         tick_broadcast_set_event(tick_next_period, 1);
                 } else
                         bc->next_event.tv64 = KTIME_MAX;
@@ -585,7 +588,7 @@ void tick_shutdown_broadcast_oneshot(unsigned int *cpup)
          * Clear the broadcast mask flag for the dead cpu, but do not
          * stop the broadcast device!
          */
-        cpu_clear(cpu, tick_broadcast_oneshot_mask);
+        cpumask_clear_cpu(cpu, tick_get_broadcast_oneshot_mask());
 
         spin_unlock_irqrestore(&tick_broadcast_lock, flags);
 }
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index f8372be74122..63e05d423a09 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -254,7 +254,7 @@ static int tick_check_new_device(struct clock_event_device *newdev)
                 curdev = NULL;
         }
         clockevents_exchange_device(curdev, newdev);
-        tick_setup_device(td, newdev, cpu, &cpumask_of_cpu(cpu));
+        tick_setup_device(td, newdev, cpu, cpumask_of(cpu));
         if (newdev->features & CLOCK_EVT_FEAT_ONESHOT)
                 tick_oneshot_notify();
 
@@ -299,9 +299,9 @@ static void tick_shutdown(unsigned int *cpup)
         }
         /* Transfer the do_timer job away from this cpu */
         if (*cpup == tick_do_timer_cpu) {
-                int cpu = first_cpu(cpu_online_map);
+                int cpu = cpumask_first(cpu_online_mask);
 
-                tick_do_timer_cpu = (cpu != NR_CPUS) ? cpu :
+                tick_do_timer_cpu = (cpu < nr_cpu_ids) ? cpu :
                         TICK_DO_TIMER_NONE;
         }
         spin_unlock_irqrestore(&tick_device_lock, flags);
diff --git a/kernel/trace/ring_buffer.c b/kernel/trace/ring_buffer.c
index 1d601a7c4587..a9d9760dc7b6 100644
--- a/kernel/trace/ring_buffer.c
+++ b/kernel/trace/ring_buffer.c
@@ -195,7 +195,7 @@ void *ring_buffer_event_data(struct ring_buffer_event *event)
 EXPORT_SYMBOL_GPL(ring_buffer_event_data);
 
 #define for_each_buffer_cpu(buffer, cpu)                \
-        for_each_cpu_mask(cpu, buffer->cpumask)
+        for_each_cpu(cpu, buffer->cpumask)
 
 #define TS_SHIFT        27
 #define TS_MASK         ((1ULL << TS_SHIFT) - 1)
@@ -267,7 +267,7 @@ struct ring_buffer {
         unsigned                        pages;
         unsigned                        flags;
         int                             cpus;
-        cpumask_t                       cpumask;
+        cpumask_var_t                   cpumask;
         atomic_t                        record_disabled;
 
         struct mutex                    mutex;
@@ -458,6 +458,9 @@ struct ring_buffer *ring_buffer_alloc(unsigned long size, unsigned flags)
         if (!buffer)
                 return NULL;
 
+        if (!alloc_cpumask_var(&buffer->cpumask, GFP_KERNEL))
+                goto fail_free_buffer;
+
         buffer->pages = DIV_ROUND_UP(size, BUF_PAGE_SIZE);
         buffer->flags = flags;
 
@@ -465,14 +468,14 @@ struct ring_buffer *ring_buffer_alloc(unsigned long size, unsigned flags)
         if (buffer->pages == 1)
                 buffer->pages++;
 
-        buffer->cpumask = cpu_possible_map;
+        cpumask_copy(buffer->cpumask, cpu_possible_mask);
         buffer->cpus = nr_cpu_ids;
 
         bsize = sizeof(void *) * nr_cpu_ids;
         buffer->buffers = kzalloc(ALIGN(bsize, cache_line_size()),
                                   GFP_KERNEL);
         if (!buffer->buffers)
-                goto fail_free_buffer;
+                goto fail_free_cpumask;
 
         for_each_buffer_cpu(buffer, cpu) {
                 buffer->buffers[cpu] =
@@ -492,6 +495,9 @@ struct ring_buffer *ring_buffer_alloc(unsigned long size, unsigned flags)
         }
         kfree(buffer->buffers);
 
+ fail_free_cpumask:
+        free_cpumask_var(buffer->cpumask);
+
  fail_free_buffer:
         kfree(buffer);
         return NULL;
@@ -510,6 +516,8 @@ ring_buffer_free(struct ring_buffer *buffer)
         for_each_buffer_cpu(buffer, cpu)
                 rb_free_cpu_buffer(buffer->buffers[cpu]);
 
+        free_cpumask_var(buffer->cpumask);
+
         kfree(buffer);
 }
 EXPORT_SYMBOL_GPL(ring_buffer_free);
@@ -1283,7 +1291,7 @@ ring_buffer_lock_reserve(struct ring_buffer *buffer,
 
         cpu = raw_smp_processor_id();
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 goto out;
 
         cpu_buffer = buffer->buffers[cpu];
@@ -1396,7 +1404,7 @@ int ring_buffer_write(struct ring_buffer *buffer,
 
         cpu = raw_smp_processor_id();
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 goto out;
 
         cpu_buffer = buffer->buffers[cpu];
@@ -1478,7 +1486,7 @@ void ring_buffer_record_disable_cpu(struct ring_buffer *buffer, int cpu)
 {
         struct ring_buffer_per_cpu *cpu_buffer;
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 return;
 
         cpu_buffer = buffer->buffers[cpu];
@@ -1498,7 +1506,7 @@ void ring_buffer_record_enable_cpu(struct ring_buffer *buffer, int cpu)
 {
         struct ring_buffer_per_cpu *cpu_buffer;
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 return;
 
         cpu_buffer = buffer->buffers[cpu];
@@ -1515,7 +1523,7 @@ unsigned long ring_buffer_entries_cpu(struct ring_buffer *buffer, int cpu)
 {
         struct ring_buffer_per_cpu *cpu_buffer;
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 return 0;
 
         cpu_buffer = buffer->buffers[cpu];
@@ -1532,7 +1540,7 @@ unsigned long ring_buffer_overrun_cpu(struct ring_buffer *buffer, int cpu)
 {
         struct ring_buffer_per_cpu *cpu_buffer;
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 return 0;
 
         cpu_buffer = buffer->buffers[cpu];
@@ -1850,7 +1858,7 @@ rb_buffer_peek(struct ring_buffer *buffer, int cpu, u64 *ts)
         struct buffer_page *reader;
         int nr_loops = 0;
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 return NULL;
 
         cpu_buffer = buffer->buffers[cpu];
@@ -2025,7 +2033,7 @@ ring_buffer_consume(struct ring_buffer *buffer, int cpu, u64 *ts)
         struct ring_buffer_event *event;
         unsigned long flags;
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 return NULL;
 
         spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
@@ -2062,7 +2070,7 @@ ring_buffer_read_start(struct ring_buffer *buffer, int cpu)
         struct ring_buffer_iter *iter;
         unsigned long flags;
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 return NULL;
 
         iter = kmalloc(sizeof(*iter), GFP_KERNEL);
@@ -2172,7 +2180,7 @@ void ring_buffer_reset_cpu(struct ring_buffer *buffer, int cpu)
         struct ring_buffer_per_cpu *cpu_buffer = buffer->buffers[cpu];
         unsigned long flags;
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 return;
 
         spin_lock_irqsave(&cpu_buffer->reader_lock, flags);
@@ -2228,7 +2236,7 @@ int ring_buffer_empty_cpu(struct ring_buffer *buffer, int cpu)
 {
         struct ring_buffer_per_cpu *cpu_buffer;
 
-        if (!cpu_isset(cpu, buffer->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer->cpumask))
                 return 1;
 
         cpu_buffer = buffer->buffers[cpu];
@@ -2252,8 +2260,8 @@ int ring_buffer_swap_cpu(struct ring_buffer *buffer_a,
         struct ring_buffer_per_cpu *cpu_buffer_a;
         struct ring_buffer_per_cpu *cpu_buffer_b;
 
-        if (!cpu_isset(cpu, buffer_a->cpumask) ||
-            !cpu_isset(cpu, buffer_b->cpumask))
+        if (!cpumask_test_cpu(cpu, buffer_a->cpumask) ||
+            !cpumask_test_cpu(cpu, buffer_b->cpumask))
                 return -EINVAL;
 
         /* At least make sure the two buffers are somewhat the same */
diff --git a/kernel/trace/trace.c b/kernel/trace/trace.c
index 0e91f43b6baf..c580233add95 100644
--- a/kernel/trace/trace.c
+++ b/kernel/trace/trace.c
@@ -89,10 +89,10 @@ static inline void ftrace_enable_cpu(void)
         preempt_enable();
 }
 
-static cpumask_t __read_mostly          tracing_buffer_mask;
+static cpumask_var_t __read_mostly      tracing_buffer_mask;
 
 #define for_each_tracing_cpu(cpu)       \
-        for_each_cpu_mask(cpu, tracing_buffer_mask)
+        for_each_cpu(cpu, tracing_buffer_mask)
 
 /*
  * ftrace_dump_on_oops - variable to dump ftrace buffer on oops
@@ -1811,10 +1811,10 @@ static void test_cpu_buff_start(struct trace_iterator *iter)
         if (!(iter->iter_flags & TRACE_FILE_ANNOTATE))
                 return;
 
-        if (cpu_isset(iter->cpu, iter->started))
+        if (cpumask_test_cpu(iter->cpu, iter->started))
                 return;
 
-        cpu_set(iter->cpu, iter->started);
+        cpumask_set_cpu(iter->cpu, iter->started);
         trace_seq_printf(s, "##### CPU %u buffer started ####\n", iter->cpu);
 }
 
@@ -2646,13 +2646,7 @@ static struct file_operations show_traces_fops = {
 /*
  * Only trace on a CPU if the bitmask is set:
  */
-static cpumask_t tracing_cpumask = CPU_MASK_ALL;
-
-/*
- * When tracing/tracing_cpu_mask is modified then this holds
- * the new bitmask we are about to install:
- */
-static cpumask_t tracing_cpumask_new;
+static cpumask_var_t tracing_cpumask;
 
 /*
  * The tracer itself will not take this lock, but still we want
@@ -2674,7 +2668,7 @@ tracing_cpumask_read(struct file *filp, char __user *ubuf,
 
         mutex_lock(&tracing_cpumask_update_lock);
 
-        len = cpumask_scnprintf(mask_str, count, &tracing_cpumask);
+        len = cpumask_scnprintf(mask_str, count, tracing_cpumask);
         if (count - len < 2) {
                 count = -EINVAL;
                 goto out_err;
@@ -2693,9 +2687,13 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
                       size_t count, loff_t *ppos)
 {
         int err, cpu;
+        cpumask_var_t tracing_cpumask_new;
+
+        if (!alloc_cpumask_var(&tracing_cpumask_new, GFP_KERNEL))
+                return -ENOMEM;
 
         mutex_lock(&tracing_cpumask_update_lock);
-        err = cpumask_parse_user(ubuf, count, &tracing_cpumask_new);
+        err = cpumask_parse_user(ubuf, count, tracing_cpumask_new);
         if (err)
                 goto err_unlock;
 
@@ -2706,26 +2704,28 @@ tracing_cpumask_write(struct file *filp, const char __user *ubuf,
                  * Increase/decrease the disabled counter if we are
                  * about to flip a bit in the cpumask:
                  */
-                if (cpu_isset(cpu, tracing_cpumask) &&
-                                !cpu_isset(cpu, tracing_cpumask_new)) {
+                if (cpumask_test_cpu(cpu, tracing_cpumask) &&
+                                !cpumask_test_cpu(cpu, tracing_cpumask_new)) {
                         atomic_inc(&global_trace.data[cpu]->disabled);
                 }
-                if (!cpu_isset(cpu, tracing_cpumask) &&
-                                cpu_isset(cpu, tracing_cpumask_new)) {
+                if (!cpumask_test_cpu(cpu, tracing_cpumask) &&
+                                cpumask_test_cpu(cpu, tracing_cpumask_new)) {
                         atomic_dec(&global_trace.data[cpu]->disabled);
                 }
         }
         __raw_spin_unlock(&ftrace_max_lock);
         local_irq_enable();
 
-        tracing_cpumask = tracing_cpumask_new;
+        cpumask_copy(tracing_cpumask, tracing_cpumask_new);
 
         mutex_unlock(&tracing_cpumask_update_lock);
+        free_cpumask_var(tracing_cpumask_new);
 
         return count;
 
 err_unlock:
         mutex_unlock(&tracing_cpumask_update_lock);
+        free_cpumask_var(tracing_cpumask);
 
         return err;
 }
@@ -3114,10 +3114,15 @@ static int tracing_open_pipe(struct inode *inode, struct file *filp)
         if (!iter)
                 return -ENOMEM;
 
+        if (!alloc_cpumask_var(&iter->started, GFP_KERNEL)) {
+                kfree(iter);
+                return -ENOMEM;
+        }
+
         mutex_lock(&trace_types_lock);
 
         /* trace pipe does not show start of buffer */
-        cpus_setall(iter->started);
+        cpumask_setall(iter->started);
 
         iter->tr = &global_trace;
         iter->trace = current_trace;
@@ -3134,6 +3139,7 @@ static int tracing_release_pipe(struct inode *inode, struct file *file)
 {
         struct trace_iterator *iter = file->private_data;
 
+        free_cpumask_var(iter->started);
         kfree(iter);
         atomic_dec(&tracing_reader);
 
@@ -3752,7 +3758,6 @@ void ftrace_dump(void)
         static DEFINE_SPINLOCK(ftrace_dump_lock);
         /* use static because iter can be a bit big for the stack */
         static struct trace_iterator iter;
-        static cpumask_t mask;
         static int dump_ran;
         unsigned long flags;
         int cnt = 0, cpu;
@@ -3786,8 +3791,6 @@ void ftrace_dump(void)
          * and then release the locks again.
          */
 
-        cpus_clear(mask);
-
         while (!trace_empty(&iter)) {
 
                 if (!cnt)
@@ -3823,19 +3826,28 @@ __init static int tracer_alloc_buffers(void)
 {
         struct trace_array_cpu *data;
         int i;
+        int ret = -ENOMEM;
 
-        /* TODO: make the number of buffers hot pluggable with CPUS */
-        tracing_buffer_mask = cpu_possible_map;
+        if (!alloc_cpumask_var(&tracing_buffer_mask, GFP_KERNEL))
+                goto out;
+
+        if (!alloc_cpumask_var(&tracing_cpumask, GFP_KERNEL))
+                goto out_free_buffer_mask;
+
+        cpumask_copy(tracing_buffer_mask, cpu_possible_mask);
+        cpumask_copy(tracing_cpumask, cpu_all_mask);
 
+        /* TODO: make the number of buffers hot pluggable with CPUS */
         global_trace.buffer = ring_buffer_alloc(trace_buf_size,
                                                    TRACE_BUFFER_FLAGS);
         if (!global_trace.buffer) {
                 printk(KERN_ERR "tracer: failed to allocate ring buffer!\n");
                 WARN_ON(1);
-                return 0;
+                goto out_free_cpumask;
         }
         global_trace.entries = ring_buffer_size(global_trace.buffer);
 
+
 #ifdef CONFIG_TRACER_MAX_TRACE
         max_tr.buffer = ring_buffer_alloc(trace_buf_size,
                                              TRACE_BUFFER_FLAGS);
@@ -3843,7 +3855,7 @@ __init static int tracer_alloc_buffers(void)
                 printk(KERN_ERR "tracer: failed to allocate max ring buffer!\n");
                 WARN_ON(1);
                 ring_buffer_free(global_trace.buffer);
-                return 0;
+                goto out_free_cpumask;
         }
         max_tr.entries = ring_buffer_size(max_tr.buffer);
         WARN_ON(max_tr.entries != global_trace.entries);
@@ -3873,8 +3885,14 @@ __init static int tracer_alloc_buffers(void)
                                        &trace_panic_notifier);
 
         register_die_notifier(&trace_die_notifier);
+        ret = 0;
 
-        return 0;
+out_free_cpumask:
+        free_cpumask_var(tracing_cpumask);
+out_free_buffer_mask:
+        free_cpumask_var(tracing_buffer_mask);
+out:
+        return ret;
 }
 early_initcall(tracer_alloc_buffers);
 fs_initcall(tracer_init_debugfs);
diff --git a/kernel/trace/trace.h b/kernel/trace/trace.h
index cc7a4f864036..4d3d381bfd95 100644
--- a/kernel/trace/trace.h
+++ b/kernel/trace/trace.h
@@ -368,7 +368,7 @@ struct trace_iterator {
         loff_t                  pos;
         long                    idx;
 
-        cpumask_t               started;
+        cpumask_var_t           started;
 };
 
 int tracing_is_enabled(void);
diff --git a/kernel/trace/trace_boot.c b/kernel/trace/trace_boot.c
index 3ccebde28482..366c8c333e13 100644
--- a/kernel/trace/trace_boot.c
+++ b/kernel/trace/trace_boot.c
@@ -42,7 +42,7 @@ static int boot_trace_init(struct trace_array *tr)
         int cpu;
         boot_trace = tr;
 
-        for_each_cpu_mask(cpu, cpu_possible_map)
+        for_each_cpu(cpu, cpu_possible_mask)
                 tracing_reset(tr, cpu);
 
         tracing_sched_switch_assign_trace(tr);
diff --git a/kernel/trace/trace_functions_graph.c b/kernel/trace/trace_functions_graph.c
index 4bf39fcae97a..930c08e5b38e 100644
--- a/kernel/trace/trace_functions_graph.c
+++ b/kernel/trace/trace_functions_graph.c
@@ -79,7 +79,7 @@ print_graph_cpu(struct trace_seq *s, int cpu)
         int i;
         int ret;
         int log10_this = log10_cpu(cpu);
-        int log10_all = log10_cpu(cpus_weight_nr(cpu_online_map));
+        int log10_all = log10_cpu(cpumask_weight(cpu_online_mask));
 
 
         /*
diff --git a/kernel/trace/trace_hw_branches.c b/kernel/trace/trace_hw_branches.c
index b6a3e20a49a9..649df22d435f 100644
--- a/kernel/trace/trace_hw_branches.c
+++ b/kernel/trace/trace_hw_branches.c
@@ -46,7 +46,7 @@ static void bts_trace_start(struct trace_array *tr)
 
         tracing_reset_online_cpus(tr);
 
-        for_each_cpu_mask(cpu, cpu_possible_map)
+        for_each_cpu(cpu, cpu_possible_mask)
                 smp_call_function_single(cpu, bts_trace_start_cpu, NULL, 1);
 }
 
@@ -62,7 +62,7 @@ static void bts_trace_stop(struct trace_array *tr)
 {
         int cpu;
 
-        for_each_cpu_mask(cpu, cpu_possible_map)
+        for_each_cpu(cpu, cpu_possible_mask)
                 smp_call_function_single(cpu, bts_trace_stop_cpu, NULL, 1);
 }
 
@@ -172,7 +172,7 @@ static void trace_bts_prepare(struct trace_iterator *iter)
 {
         int cpu;
 
-        for_each_cpu_mask(cpu, cpu_possible_map)
+        for_each_cpu(cpu, cpu_possible_mask)
                 smp_call_function_single(cpu, trace_bts_cpu, iter->tr, 1);
 }
 
diff --git a/kernel/trace/trace_power.c b/kernel/trace/trace_power.c
index a7172a352f62..7bda248daf55 100644
--- a/kernel/trace/trace_power.c
+++ b/kernel/trace/trace_power.c
@@ -39,7 +39,7 @@ static int power_trace_init(struct trace_array *tr)
 
         trace_power_enabled = 1;
 
-        for_each_cpu_mask(cpu, cpu_possible_map)
+        for_each_cpu(cpu, cpu_possible_mask)
                 tracing_reset(tr, cpu);
         return 0;
 }
diff --git a/kernel/trace/trace_sysprof.c b/kernel/trace/trace_sysprof.c
index a5779bd975db..eaca5ad803ff 100644
--- a/kernel/trace/trace_sysprof.c
+++ b/kernel/trace/trace_sysprof.c
@@ -196,9 +196,9 @@ static enum hrtimer_restart stack_trace_timer_fn(struct hrtimer *hrtimer)
         return HRTIMER_RESTART;
 }
 
-static void start_stack_timer(int cpu)
+static void start_stack_timer(void *unused)
 {
-        struct hrtimer *hrtimer = &per_cpu(stack_trace_hrtimer, cpu);
+        struct hrtimer *hrtimer = &__get_cpu_var(stack_trace_hrtimer);
 
         hrtimer_init(hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
         hrtimer->function = stack_trace_timer_fn;
@@ -208,14 +208,7 @@ static void start_stack_timer(int cpu)
 
 static void start_stack_timers(void)
 {
-        cpumask_t saved_mask = current->cpus_allowed;
-        int cpu;
-
-        for_each_online_cpu(cpu) {
-                set_cpus_allowed_ptr(current, &cpumask_of_cpu(cpu));
-                start_stack_timer(cpu);
-        }
-        set_cpus_allowed_ptr(current, &saved_mask);
+        on_each_cpu(start_stack_timer, NULL, 1);
 }
 
 static void stop_stack_timer(int cpu)
diff --git a/kernel/workqueue.c b/kernel/workqueue.c
index 4952322cba45..2f445833ae37 100644
--- a/kernel/workqueue.c
+++ b/kernel/workqueue.c
@@ -73,7 +73,7 @@ static DEFINE_SPINLOCK(workqueue_lock);
 static LIST_HEAD(workqueues);
 
 static int singlethread_cpu __read_mostly;
-static cpumask_t cpu_singlethread_map __read_mostly;
+static const struct cpumask *cpu_singlethread_map __read_mostly;
 /*
  * _cpu_down() first removes CPU from cpu_online_map, then CPU_DEAD
  * flushes cwq->worklist. This means that flush_workqueue/wait_on_work
@@ -81,7 +81,7 @@ static cpumask_t cpu_singlethread_map __read_mostly;
  * use cpu_possible_map, the cpumask below is more a documentation
  * than optimization.
  */
-static cpumask_t cpu_populated_map __read_mostly;
+static cpumask_var_t cpu_populated_map __read_mostly;
 
 /* If it's single threaded, it isn't in the list of workqueues. */
 static inline int is_wq_single_threaded(struct workqueue_struct *wq)
@@ -89,10 +89,10 @@ static inline int is_wq_single_threaded(struct workqueue_struct *wq)
         return wq->singlethread;
 }
 
-static const cpumask_t *wq_cpu_map(struct workqueue_struct *wq)
+static const struct cpumask *wq_cpu_map(struct workqueue_struct *wq)
 {
         return is_wq_single_threaded(wq)
-                ? &cpu_singlethread_map : &cpu_populated_map;
+                ? cpu_singlethread_map : cpu_populated_map;
 }
 
 static
@@ -410,7 +410,7 @@ static int flush_cpu_workqueue(struct cpu_workqueue_struct *cwq)
  */
 void flush_workqueue(struct workqueue_struct *wq)
 {
-        const cpumask_t *cpu_map = wq_cpu_map(wq);
+        const struct cpumask *cpu_map = wq_cpu_map(wq);
         int cpu;
 
         might_sleep();
@@ -532,7 +532,7 @@ static void wait_on_work(struct work_struct *work)
 {
         struct cpu_workqueue_struct *cwq;
         struct workqueue_struct *wq;
-        const cpumask_t *cpu_map;
+        const struct cpumask *cpu_map;
         int cpu;
 
         might_sleep();
@@ -903,7 +903,7 @@ static void cleanup_workqueue_thread(struct cpu_workqueue_struct *cwq)
  */
 void destroy_workqueue(struct workqueue_struct *wq)
 {
-        const cpumask_t *cpu_map = wq_cpu_map(wq);
+        const struct cpumask *cpu_map = wq_cpu_map(wq);
         int cpu;
 
         cpu_maps_update_begin();
@@ -933,7 +933,7 @@ static int __devinit workqueue_cpu_callback(struct notifier_block *nfb,
 
         switch (action) {
         case CPU_UP_PREPARE:
-                cpu_set(cpu, cpu_populated_map);
+                cpumask_set_cpu(cpu, cpu_populated_map);
         }
 undo:
         list_for_each_entry(wq, &workqueues, list) {
@@ -964,7 +964,7 @@ undo:
         switch (action) {
         case CPU_UP_CANCELED:
         case CPU_POST_DEAD:
-                cpu_clear(cpu, cpu_populated_map);
+                cpumask_clear_cpu(cpu, cpu_populated_map);
         }
 
         return ret;
@@ -1017,9 +1017,11 @@ EXPORT_SYMBOL_GPL(work_on_cpu);
 
 void __init init_workqueues(void)
 {
-        cpu_populated_map = cpu_online_map;
-        singlethread_cpu = first_cpu(cpu_possible_map);
-        cpu_singlethread_map = cpumask_of_cpu(singlethread_cpu);
+        alloc_cpumask_var(&cpu_populated_map, GFP_KERNEL);
+
+        cpumask_copy(cpu_populated_map, cpu_online_mask);
+        singlethread_cpu = cpumask_first(cpu_possible_mask);
+        cpu_singlethread_map = cpumask_of(singlethread_cpu);
         hotcpu_notifier(workqueue_cpu_callback, 0);
         keventd_wq = create_workqueue("events");
         BUG_ON(!keventd_wq);