cpumask: make irq_set_affinity() take a const struct cpumask

Impact: change existing irq_chip API

Not much point with gentle transition here: the struct irq_chip's
setaffinity method signature needs to change.

Fortunately, not widely used code, but hits a few architectures.

Note: In irq_select_affinity() I save a temporary in by mangling
irq_desc[irq].affinity directly.  Ingo, does this break anything?

(Folded in fix from KOSAKI Motohiro)

Signed-off-by: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Mike Travis <travis@sgi.com>
Reviewed-by: Grant Grundler <grundler@parisc-linux.org>
Acked-by: Ingo Molnar <mingo@redhat.com>
Cc: ralf@linux-mips.org
Cc: grundler@parisc-linux.org
Cc: jeremy@xensource.com
Cc: KOSAKI Motohiro <kosaki.motohiro@jp.fujitsu.com>

42 files changed, 171 insertions, 161 deletions

diff --git a/arch/alpha/kernel/irq.c b/arch/alpha/kernel/irq.c
index c626a821cdcb..d0f1620007f7 100644
--- a/arch/alpha/kernel/irq.c
+++ b/arch/alpha/kernel/irq.c
@@ -55,7 +55,7 @@ int irq_select_affinity(unsigned int irq)
         last_cpu = cpu;
 
         irq_desc[irq].affinity = cpumask_of_cpu(cpu);
-        irq_desc[irq].chip->set_affinity(irq, cpumask_of_cpu(cpu));
+        irq_desc[irq].chip->set_affinity(irq, cpumask_of(cpu));
         return 0;
 }
 #endif /* CONFIG_SMP */
diff --git a/arch/alpha/kernel/sys_dp264.c b/arch/alpha/kernel/sys_dp264.c
index c71b0fd7a61f..ab44c164d9d4 100644
--- a/arch/alpha/kernel/sys_dp264.c
+++ b/arch/alpha/kernel/sys_dp264.c
@@ -177,19 +177,19 @@ cpu_set_irq_affinity(unsigned int irq, cpumask_t affinity)
 }
 
 static void
-dp264_set_affinity(unsigned int irq, cpumask_t affinity)
+dp264_set_affinity(unsigned int irq, const struct cpumask *affinity)
 { 
         spin_lock(&dp264_irq_lock);
-        cpu_set_irq_affinity(irq, affinity);
+        cpu_set_irq_affinity(irq, *affinity);
         tsunami_update_irq_hw(cached_irq_mask);
         spin_unlock(&dp264_irq_lock);
 }
 
 static void
-clipper_set_affinity(unsigned int irq, cpumask_t affinity)
+clipper_set_affinity(unsigned int irq, const struct cpumask *affinity)
 { 
         spin_lock(&dp264_irq_lock);
-        cpu_set_irq_affinity(irq - 16, affinity);
+        cpu_set_irq_affinity(irq - 16, *affinity);
         tsunami_update_irq_hw(cached_irq_mask);
         spin_unlock(&dp264_irq_lock);
 }
diff --git a/arch/alpha/kernel/sys_titan.c b/arch/alpha/kernel/sys_titan.c
index 52c91ccc1648..27f840a4ad3d 100644
--- a/arch/alpha/kernel/sys_titan.c
+++ b/arch/alpha/kernel/sys_titan.c
@@ -158,10 +158,10 @@ titan_cpu_set_irq_affinity(unsigned int irq, cpumask_t affinity)
 }
 
 static void
-titan_set_irq_affinity(unsigned int irq, cpumask_t affinity)
+titan_set_irq_affinity(unsigned int irq, const struct cpumask *affinity)
 { 
         spin_lock(&titan_irq_lock);
-        titan_cpu_set_irq_affinity(irq - 16, affinity);
+        titan_cpu_set_irq_affinity(irq - 16, *affinity);
         titan_update_irq_hw(titan_cached_irq_mask);
         spin_unlock(&titan_irq_lock);
 }
diff --git a/arch/arm/common/gic.c b/arch/arm/common/gic.c
index 7fc9860a97d7..c6884ba1d5ed 100644
--- a/arch/arm/common/gic.c
+++ b/arch/arm/common/gic.c
@@ -109,11 +109,11 @@ static void gic_unmask_irq(unsigned int irq)
 }
 
 #ifdef CONFIG_SMP
-static void gic_set_cpu(unsigned int irq, cpumask_t mask_val)
+static void gic_set_cpu(unsigned int irq, const struct cpumask *mask_val)
 {
         void __iomem *reg = gic_dist_base(irq) + GIC_DIST_TARGET + (gic_irq(irq) & ~3);
         unsigned int shift = (irq % 4) * 8;
-        unsigned int cpu = first_cpu(mask_val);
+        unsigned int cpu = cpumask_first(mask_val);
         u32 val;
 
         spin_lock(&irq_controller_lock);
diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c
index 2f3eb795fa6e..7141cee1fab7 100644
--- a/arch/arm/kernel/irq.c
+++ b/arch/arm/kernel/irq.c
@@ -174,7 +174,7 @@ static void route_irq(struct irq_desc *desc, unsigned int irq, unsigned int cpu)
         pr_debug("IRQ%u: moving from cpu%u to cpu%u\n", irq, desc->cpu, cpu);
 
         spin_lock_irq(&desc->lock);
-        desc->chip->set_affinity(irq, cpumask_of_cpu(cpu));
+        desc->chip->set_affinity(irq, cpumask_of(cpu));
         spin_unlock_irq(&desc->lock);
 }
 
diff --git a/arch/arm/oprofile/op_model_mpcore.c b/arch/arm/oprofile/op_model_mpcore.c
index 4de366e8b4c5..6d6bd5899240 100644
--- a/arch/arm/oprofile/op_model_mpcore.c
+++ b/arch/arm/oprofile/op_model_mpcore.c
@@ -260,10 +260,10 @@ static void em_stop(void)
 static void em_route_irq(int irq, unsigned int cpu)
 {
         struct irq_desc *desc = irq_desc + irq;
-        cpumask_t mask = cpumask_of_cpu(cpu);
+        const struct cpumask *mask = cpumask_of(cpu);
 
         spin_lock_irq(&desc->lock);
-        desc->affinity = mask;
+        desc->affinity = *mask;
         desc->chip->set_affinity(irq, mask);
         spin_unlock_irq(&desc->lock);
 }
diff --git a/arch/cris/arch-v32/kernel/irq.c b/arch/cris/arch-v32/kernel/irq.c
index 173c141ac9ba..295131fee710 100644
--- a/arch/cris/arch-v32/kernel/irq.c
+++ b/arch/cris/arch-v32/kernel/irq.c
@@ -325,11 +325,11 @@ static void end_crisv32_irq(unsigned int irq)
 {
 }
 
-void set_affinity_crisv32_irq(unsigned int irq, cpumask_t dest)
+void set_affinity_crisv32_irq(unsigned int irq, const struct cpumask *dest)
 {
         unsigned long flags;
         spin_lock_irqsave(&irq_lock, flags);
-        irq_allocations[irq - FIRST_IRQ].mask = dest;
+        irq_allocations[irq - FIRST_IRQ].mask = *dest;
         spin_unlock_irqrestore(&irq_lock, flags);
 }
 
diff --git a/arch/ia64/hp/sim/hpsim_irq.c b/arch/ia64/hp/sim/hpsim_irq.c
index c2f58ff364e7..cc0a3182db3c 100644
--- a/arch/ia64/hp/sim/hpsim_irq.c
+++ b/arch/ia64/hp/sim/hpsim_irq.c
@@ -22,7 +22,7 @@ hpsim_irq_noop (unsigned int irq)
 }
 
 static void
-hpsim_set_affinity_noop (unsigned int a, cpumask_t b)
+hpsim_set_affinity_noop(unsigned int a, const struct cpumask *b)
 {
 }
 
diff --git a/arch/ia64/kernel/iosapic.c b/arch/ia64/kernel/iosapic.c
index 5c4674ae8aea..c8adecd5b416 100644
--- a/arch/ia64/kernel/iosapic.c
+++ b/arch/ia64/kernel/iosapic.c
@@ -330,25 +330,25 @@ unmask_irq (unsigned int irq)
 
 
 static void
-iosapic_set_affinity (unsigned int irq, cpumask_t mask)
+iosapic_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
 #ifdef CONFIG_SMP
         u32 high32, low32;
-        int dest, rte_index;
+        int cpu, dest, rte_index;
         int redir = (irq & IA64_IRQ_REDIRECTED) ? 1 : 0;
         struct iosapic_rte_info *rte;
         struct iosapic *iosapic;
 
         irq &= (~IA64_IRQ_REDIRECTED);
 
-        cpus_and(mask, mask, cpu_online_map);
-        if (cpus_empty(mask))
+        cpu = cpumask_first_and(cpu_online_mask, mask);
+        if (cpu >= nr_cpu_ids)
                 return;
 
-        if (irq_prepare_move(irq, first_cpu(mask)))
+        if (irq_prepare_move(irq, cpu))
                 return;
 
-        dest = cpu_physical_id(first_cpu(mask));
+        dest = cpu_physical_id(cpu);
 
         if (!iosapic_intr_info[irq].count)
                 return;                 /* not an IOSAPIC interrupt */
diff --git a/arch/ia64/kernel/irq.c b/arch/ia64/kernel/irq.c
index 7fd18f54c056..0b6db53fedcf 100644
--- a/arch/ia64/kernel/irq.c
+++ b/arch/ia64/kernel/irq.c
@@ -133,7 +133,6 @@ unsigned int vectors_in_migration[NR_IRQS];
  */
 static void migrate_irqs(void)
 {
-        cpumask_t       mask;
         irq_desc_t *desc;
         int             irq, new_cpu;
 
@@ -152,15 +151,14 @@ static void migrate_irqs(void)
                 if (desc->status == IRQ_PER_CPU)
                         continue;
 
-                cpus_and(mask, irq_desc[irq].affinity, cpu_online_map);
-                if (any_online_cpu(mask) == NR_CPUS) {
+                if (cpumask_any_and(&irq_desc[irq].affinity, cpu_online_mask)
+                    >= nr_cpu_ids) {
                         /*
                          * Save it for phase 2 processing
                          */
                         vectors_in_migration[irq] = irq;
 
                         new_cpu = any_online_cpu(cpu_online_map);
-                        mask = cpumask_of_cpu(new_cpu);
 
                         /*
                          * Al three are essential, currently WARN_ON.. maybe panic?
@@ -168,7 +166,8 @@ static void migrate_irqs(void)
                         if (desc->chip && desc->chip->disable &&
                                 desc->chip->enable && desc->chip->set_affinity) {
                                 desc->chip->disable(irq);
-                                desc->chip->set_affinity(irq, mask);
+                                desc->chip->set_affinity(irq,
+                                                         cpumask_of(new_cpu));
                                 desc->chip->enable(irq);
                         } else {
                                 WARN_ON((!(desc->chip) || !(desc->chip->disable) ||
diff --git a/arch/ia64/kernel/msi_ia64.c b/arch/ia64/kernel/msi_ia64.c
index 702a09c13238..890339339035 100644
--- a/arch/ia64/kernel/msi_ia64.c
+++ b/arch/ia64/kernel/msi_ia64.c
@@ -49,11 +49,12 @@
 static struct irq_chip  ia64_msi_chip;
 
 #ifdef CONFIG_SMP
-static void ia64_set_msi_irq_affinity(unsigned int irq, cpumask_t cpu_mask)
+static void ia64_set_msi_irq_affinity(unsigned int irq,
+                                      const cpumask_t *cpu_mask)
 {
         struct msi_msg msg;
         u32 addr, data;
-        int cpu = first_cpu(cpu_mask);
+        int cpu = first_cpu(*cpu_mask);
 
         if (!cpu_online(cpu))
                 return;
@@ -166,12 +167,11 @@ void arch_teardown_msi_irq(unsigned int irq)
 
 #ifdef CONFIG_DMAR
 #ifdef CONFIG_SMP
-static void dmar_msi_set_affinity(unsigned int irq, cpumask_t mask)
+static void dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
         struct irq_cfg *cfg = irq_cfg + irq;
         struct msi_msg msg;
-        int cpu = first_cpu(mask);
-
+        int cpu = cpumask_first(mask);
 
         if (!cpu_online(cpu))
                 return;
@@ -187,7 +187,7 @@ static void dmar_msi_set_affinity(unsigned int irq, cpumask_t mask)
         msg.address_lo |= MSI_ADDR_DESTID_CPU(cpu_physical_id(cpu));
 
         dmar_msi_write(irq, &msg);
-        irq_desc[irq].affinity = mask;
+        irq_desc[irq].affinity = *mask;
 }
 #endif /* CONFIG_SMP */
 
diff --git a/arch/ia64/kernel/smpboot.c b/arch/ia64/kernel/smpboot.c
index 4ede6e571c38..11463994a7d5 100644
--- a/arch/ia64/kernel/smpboot.c
+++ b/arch/ia64/kernel/smpboot.c
@@ -682,7 +682,7 @@ int migrate_platform_irqs(unsigned int cpu)
 {
         int new_cpei_cpu;
         irq_desc_t *desc = NULL;
-        cpumask_t       mask;
+        const struct cpumask *mask;
         int             retval = 0;
 
         /*
@@ -695,7 +695,7 @@ int migrate_platform_irqs(unsigned int cpu)
                          * Now re-target the CPEI to a different processor
                          */
                         new_cpei_cpu = any_online_cpu(cpu_online_map);
-                        mask = cpumask_of_cpu(new_cpei_cpu);
+                        mask = cpumask_of(new_cpei_cpu);
                         set_cpei_target_cpu(new_cpei_cpu);
                         desc = irq_desc + ia64_cpe_irq;
                         /*
diff --git a/arch/ia64/sn/kernel/irq.c b/arch/ia64/sn/kernel/irq.c
index 0c66dbdd1d72..66fd705e82c0 100644
--- a/arch/ia64/sn/kernel/irq.c
+++ b/arch/ia64/sn/kernel/irq.c
@@ -227,14 +227,14 @@ finish_up:
         return new_irq_info;
 }
 
-static void sn_set_affinity_irq(unsigned int irq, cpumask_t mask)
+static void sn_set_affinity_irq(unsigned int irq, const struct cpumask *mask)
 {
         struct sn_irq_info *sn_irq_info, *sn_irq_info_safe;
         nasid_t nasid;
         int slice;
 
-        nasid = cpuid_to_nasid(first_cpu(mask));
-        slice = cpuid_to_slice(first_cpu(mask));
+        nasid = cpuid_to_nasid(cpumask_first(mask));
+        slice = cpuid_to_slice(cpumask_first(mask));
 
         list_for_each_entry_safe(sn_irq_info, sn_irq_info_safe,
                                  sn_irq_lh[irq], list)
diff --git a/arch/ia64/sn/kernel/msi_sn.c b/arch/ia64/sn/kernel/msi_sn.c
index 83f190ffe350..ca553b0429ce 100644
--- a/arch/ia64/sn/kernel/msi_sn.c
+++ b/arch/ia64/sn/kernel/msi_sn.c
@@ -151,7 +151,8 @@ int sn_setup_msi_irq(struct pci_dev *pdev, struct msi_desc *entry)
 }
 
 #ifdef CONFIG_SMP
-static void sn_set_msi_irq_affinity(unsigned int irq, cpumask_t cpu_mask)
+static void sn_set_msi_irq_affinity(unsigned int irq,
+                                    const struct cpumask *cpu_mask)
 {
         struct msi_msg msg;
         int slice;
@@ -164,7 +165,7 @@ static void sn_set_msi_irq_affinity(unsigned int irq, cpumask_t cpu_mask)
         struct sn_pcibus_provider *provider;
         unsigned int cpu;
 
-        cpu = first_cpu(cpu_mask);
+        cpu = cpumask_first(cpu_mask);
         sn_irq_info = sn_msi_info[irq].sn_irq_info;
         if (sn_irq_info == NULL || sn_irq_info->irq_int_bit >= 0)
                 return;
@@ -204,7 +205,7 @@ static void sn_set_msi_irq_affinity(unsigned int irq, cpumask_t cpu_mask)
         msg.address_lo = (u32)(bus_addr & 0x00000000ffffffff);
 
         write_msi_msg(irq, &msg);
-        irq_desc[irq].affinity = cpu_mask;
+        irq_desc[irq].affinity = *cpu_mask;
 }
 #endif /* CONFIG_SMP */
 
diff --git a/arch/mips/include/asm/irq.h b/arch/mips/include/asm/irq.h
index a58f0eecc68f..abc62aa744ac 100644
--- a/arch/mips/include/asm/irq.h
+++ b/arch/mips/include/asm/irq.h
@@ -49,7 +49,8 @@ static inline void smtc_im_ack_irq(unsigned int irq)
 #ifdef CONFIG_MIPS_MT_SMTC_IRQAFF
 #include <linux/cpumask.h>
 
-extern void plat_set_irq_affinity(unsigned int irq, cpumask_t affinity);
+extern void plat_set_irq_affinity(unsigned int irq,
+                                  const struct cpumask *affinity);
 extern void smtc_forward_irq(unsigned int irq);
 
 /*
diff --git a/arch/mips/kernel/cevt-bcm1480.c b/arch/mips/kernel/cevt-bcm1480.c
index 0a57f86945f1..d7e21bc8cd21 100644
--- a/arch/mips/kernel/cevt-bcm1480.c
+++ b/arch/mips/kernel/cevt-bcm1480.c
@@ -148,6 +148,6 @@ void __cpuinit sb1480_clockevent_init(void)
         action->name    = name;
         action->dev_id  = cd;
 
-        irq_set_affinity(irq, cpumask_of_cpu(cpu));
+        irq_set_affinity(irq, cpumask_of(cpu));
         setup_irq(irq, action);
 }
diff --git a/arch/mips/kernel/cevt-sb1250.c b/arch/mips/kernel/cevt-sb1250.c
index 63ac3ad462bc..0f188cd46e03 100644
--- a/arch/mips/kernel/cevt-sb1250.c
+++ b/arch/mips/kernel/cevt-sb1250.c
@@ -147,6 +147,6 @@ void __cpuinit sb1250_clockevent_init(void)
         action->name    = name;
         action->dev_id  = cd;
 
-        irq_set_affinity(irq, cpumask_of_cpu(cpu));
+        irq_set_affinity(irq, cpumask_of(cpu));
         setup_irq(irq, action);
 }
diff --git a/arch/mips/kernel/irq-gic.c b/arch/mips/kernel/irq-gic.c
index f0a4bb19e096..494a49a317e9 100644
--- a/arch/mips/kernel/irq-gic.c
+++ b/arch/mips/kernel/irq-gic.c
@@ -155,7 +155,7 @@ static void gic_unmask_irq(unsigned int irq)
 
 static DEFINE_SPINLOCK(gic_lock);
 
-static void gic_set_affinity(unsigned int irq, cpumask_t cpumask)
+static void gic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
 {
         cpumask_t       tmp = CPU_MASK_NONE;
         unsigned long   flags;
@@ -164,7 +164,7 @@ static void gic_set_affinity(unsigned int irq, cpumask_t cpumask)
         pr_debug(KERN_DEBUG "%s called\n", __func__);
         irq -= _irqbase;
 
-        cpus_and(tmp, cpumask, cpu_online_map);
+        cpumask_and(&tmp, cpumask, cpu_online_mask);
         if (cpus_empty(tmp))
                 return;
 
@@ -187,7 +187,7 @@ static void gic_set_affinity(unsigned int irq, cpumask_t cpumask)
                 set_bit(irq, pcpu_masks[first_cpu(tmp)].pcpu_mask);
 
         }
-        irq_desc[irq].affinity = cpumask;
+        irq_desc[irq].affinity = *cpumask;
         spin_unlock_irqrestore(&gic_lock, flags);
 
 }
diff --git a/arch/mips/mti-malta/malta-smtc.c b/arch/mips/mti-malta/malta-smtc.c
index f84a46a8ae6e..aabd7274507b 100644
--- a/arch/mips/mti-malta/malta-smtc.c
+++ b/arch/mips/mti-malta/malta-smtc.c
@@ -114,9 +114,9 @@ struct plat_smp_ops msmtc_smp_ops = {
  */
 
 
-void plat_set_irq_affinity(unsigned int irq, cpumask_t affinity)
+void plat_set_irq_affinity(unsigned int irq, const struct cpumask *affinity)
 {
-        cpumask_t tmask = affinity;
+        cpumask_t tmask = *affinity;
         int cpu = 0;
         void smtc_set_irq_affinity(unsigned int irq, cpumask_t aff);
 
@@ -139,7 +139,7 @@ void plat_set_irq_affinity(unsigned int irq, cpumask_t affinity)
          * be made to forward to an offline "CPU".
          */
 
-        for_each_cpu_mask(cpu, affinity) {
+        for_each_cpu(cpu, affinity) {
                 if ((cpu_data[cpu].vpe_id != 0) || !cpu_online(cpu))
                         cpu_clear(cpu, tmask);
         }
diff --git a/arch/mips/sibyte/bcm1480/irq.c b/arch/mips/sibyte/bcm1480/irq.c
index a35818ed4263..12b465d404df 100644
--- a/arch/mips/sibyte/bcm1480/irq.c
+++ b/arch/mips/sibyte/bcm1480/irq.c
@@ -50,7 +50,7 @@ static void enable_bcm1480_irq(unsigned int irq);
 static void disable_bcm1480_irq(unsigned int irq);
 static void ack_bcm1480_irq(unsigned int irq);
 #ifdef CONFIG_SMP
-static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask);
+static void bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask);
 #endif
 
 #ifdef CONFIG_PCI
@@ -109,7 +109,7 @@ void bcm1480_unmask_irq(int cpu, int irq)
 }
 
 #ifdef CONFIG_SMP
-static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask)
+static void bcm1480_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
         int i = 0, old_cpu, cpu, int_on, k;
         u64 cur_ints;
@@ -117,11 +117,11 @@ static void bcm1480_set_affinity(unsigned int irq, cpumask_t mask)
         unsigned long flags;
         unsigned int irq_dirty;
 
-        if (cpus_weight(mask) != 1) {
+        if (cpumask_weight(mask) != 1) {
                 printk("attempted to set irq affinity for irq %d to multiple CPUs\n", irq);
                 return;
         }
-        i = first_cpu(mask);
+        i = cpumask_first(mask);
 
         /* Convert logical CPU to physical CPU */
         cpu = cpu_logical_map(i);
diff --git a/arch/mips/sibyte/sb1250/irq.c b/arch/mips/sibyte/sb1250/irq.c
index a5158483986e..808ac2959b8c 100644
--- a/arch/mips/sibyte/sb1250/irq.c
+++ b/arch/mips/sibyte/sb1250/irq.c
@@ -50,7 +50,7 @@ static void enable_sb1250_irq(unsigned int irq);
 static void disable_sb1250_irq(unsigned int irq);
 static void ack_sb1250_irq(unsigned int irq);
 #ifdef CONFIG_SMP
-static void sb1250_set_affinity(unsigned int irq, cpumask_t mask);
+static void sb1250_set_affinity(unsigned int irq, const struct cpumask *mask);
 #endif
 
 #ifdef CONFIG_SIBYTE_HAS_LDT
@@ -103,16 +103,16 @@ void sb1250_unmask_irq(int cpu, int irq)
 }
 
 #ifdef CONFIG_SMP
-static void sb1250_set_affinity(unsigned int irq, cpumask_t mask)
+static void sb1250_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
         int i = 0, old_cpu, cpu, int_on;
         u64 cur_ints;
         struct irq_desc *desc = irq_desc + irq;
         unsigned long flags;
 
-        i = first_cpu(mask);
+        i = cpumask_first(mask);
 
-        if (cpus_weight(mask) > 1) {
+        if (cpumask_weight(mask) > 1) {
                 printk("attempted to set irq affinity for irq %d to multiple CPUs\n", irq);
                 return;
         }
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index 23ef950df008..4cea935e2f99 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -131,12 +131,12 @@ int cpu_check_affinity(unsigned int irq, cpumask_t *dest)
         return 0;
 }
 
-static void cpu_set_affinity_irq(unsigned int irq, cpumask_t dest)
+static void cpu_set_affinity_irq(unsigned int irq, const struct cpumask *dest)
 {
-        if (cpu_check_affinity(irq, &dest))
+        if (cpu_check_affinity(irq, dest))
                 return;
 
-        irq_desc[irq].affinity = dest;
+        irq_desc[irq].affinity = *dest;
 }
 #endif
 
diff --git a/arch/powerpc/kernel/irq.c b/arch/powerpc/kernel/irq.c
index ac222d0ab12e..23b8b5e36f98 100644
--- a/arch/powerpc/kernel/irq.c
+++ b/arch/powerpc/kernel/irq.c
@@ -237,7 +237,7 @@ void fixup_irqs(cpumask_t map)
                         mask = map;
                 }
                 if (irq_desc[irq].chip->set_affinity)
-                        irq_desc[irq].chip->set_affinity(irq, mask);
+                        irq_desc[irq].chip->set_affinity(irq, &mask);
                 else if (irq_desc[irq].action && !(warned++))
                         printk("Cannot set affinity for irq %i\n", irq);
         }
diff --git a/arch/powerpc/platforms/pseries/xics.c b/arch/powerpc/platforms/pseries/xics.c
index 64d24310ce7e..424b335a71c8 100644
--- a/arch/powerpc/platforms/pseries/xics.c
+++ b/arch/powerpc/platforms/pseries/xics.c
@@ -332,7 +332,7 @@ static void xics_eoi_lpar(unsigned int virq)
         lpar_xirr_info_set((0xff << 24) | irq);
 }
 
-static void xics_set_affinity(unsigned int virq, cpumask_t cpumask)
+static void xics_set_affinity(unsigned int virq, const struct cpumask *cpumask)
 {
         unsigned int irq;
         int status;
@@ -358,7 +358,7 @@ static void xics_set_affinity(unsigned int virq, cpumask_t cpumask)
         irq_server = get_irq_server(virq, 1);
         if (irq_server == -1) {
                 char cpulist[128];
-                cpumask_scnprintf(cpulist, sizeof(cpulist), &cpumask);
+                cpumask_scnprintf(cpulist, sizeof(cpulist), cpumask);
                 printk(KERN_WARNING
                         "%s: No online cpus in the mask %s for irq %d\n",
                         __func__, cpulist, virq);
@@ -845,7 +845,7 @@ void xics_migrate_irqs_away(void)
 
                 /* Reset affinity to all cpus */
                 irq_desc[virq].affinity = CPU_MASK_ALL;
-                desc->chip->set_affinity(virq, CPU_MASK_ALL);
+                desc->chip->set_affinity(virq, cpu_all_mask);
 unlock:
                 spin_unlock_irqrestore(&desc->lock, flags);
         }
diff --git a/arch/powerpc/sysdev/mpic.c b/arch/powerpc/sysdev/mpic.c
index 1890fb085cde..5d7f9f0c93c3 100644
--- a/arch/powerpc/sysdev/mpic.c
+++ b/arch/powerpc/sysdev/mpic.c
@@ -817,7 +817,7 @@ static void mpic_end_ipi(unsigned int irq)
 
 #endif /* CONFIG_SMP */
 
-void mpic_set_affinity(unsigned int irq, cpumask_t cpumask)
+void mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask)
 {
         struct mpic *mpic = mpic_from_irq(irq);
         unsigned int src = mpic_irq_to_hw(irq);
@@ -829,7 +829,7 @@ void mpic_set_affinity(unsigned int irq, cpumask_t cpumask)
         } else {
                 cpumask_t tmp;
 
-                cpus_and(tmp, cpumask, cpu_online_map);
+                cpumask_and(&tmp, cpumask, cpu_online_mask);
 
                 mpic_irq_write(src, MPIC_INFO(IRQ_DESTINATION),
                                mpic_physmask(cpus_addr(tmp)[0]));
diff --git a/arch/powerpc/sysdev/mpic.h b/arch/powerpc/sysdev/mpic.h
index 6209c62a426d..3cef2af10f42 100644
--- a/arch/powerpc/sysdev/mpic.h
+++ b/arch/powerpc/sysdev/mpic.h
@@ -36,6 +36,6 @@ static inline int mpic_pasemi_msi_init(struct mpic *mpic)
 
 extern int mpic_set_irq_type(unsigned int virq, unsigned int flow_type);
 extern void mpic_set_vector(unsigned int virq, unsigned int vector);
-extern void mpic_set_affinity(unsigned int irq, cpumask_t cpumask);
+extern void mpic_set_affinity(unsigned int irq, const struct cpumask *cpumask);
 
 #endif /* _POWERPC_SYSDEV_MPIC_H */
diff --git a/arch/sparc64/kernel/irq.c b/arch/sparc64/kernel/irq.c
index 52fc836f464d..4aaf18e83c8c 100644
--- a/arch/sparc64/kernel/irq.c
+++ b/arch/sparc64/kernel/irq.c
@@ -312,7 +312,8 @@ static void sun4u_irq_enable(unsigned int virt_irq)
         }
 }
 
-static void sun4u_set_affinity(unsigned int virt_irq, cpumask_t mask)
+static void sun4u_set_affinity(unsigned int virt_irq,
+                               const struct cpumask *mask)
 {
         sun4u_irq_enable(virt_irq);
 }
@@ -362,7 +363,8 @@ static void sun4v_irq_enable(unsigned int virt_irq)
                        ino, err);
 }
 
-static void sun4v_set_affinity(unsigned int virt_irq, cpumask_t mask)
+static void sun4v_set_affinity(unsigned int virt_irq,
+                               const struct cpumask *mask)
 {
         unsigned int ino = virt_irq_table[virt_irq].dev_ino;
         unsigned long cpuid = irq_choose_cpu(virt_irq);
@@ -429,7 +431,8 @@ static void sun4v_virq_enable(unsigned int virt_irq)
                        dev_handle, dev_ino, err);
 }
 
-static void sun4v_virt_set_affinity(unsigned int virt_irq, cpumask_t mask)
+static void sun4v_virt_set_affinity(unsigned int virt_irq,
+                                    const struct cpumask *mask)
 {
         unsigned long cpuid, dev_handle, dev_ino;
         int err;
@@ -788,7 +791,7 @@ void fixup_irqs(void)
                     !(irq_desc[irq].status & IRQ_PER_CPU)) {
                         if (irq_desc[irq].chip->set_affinity)
                                 irq_desc[irq].chip->set_affinity(irq,
-                                        irq_desc[irq].affinity);
+                                        &irq_desc[irq].affinity);
                 }
                 spin_unlock_irqrestore(&irq_desc[irq].lock, flags);
         }
diff --git a/arch/sparc64/kernel/of_device.c b/arch/sparc64/kernel/of_device.c
index 0f616ae3246c..df2efb7fc14c 100644
--- a/arch/sparc64/kernel/of_device.c
+++ b/arch/sparc64/kernel/of_device.c
@@ -780,7 +780,7 @@ out:
         if (nid != -1) {
                 cpumask_t numa_mask = node_to_cpumask(nid);
 
-                irq_set_affinity(irq, numa_mask);
+                irq_set_affinity(irq, &numa_mask);
         }
 
         return irq;
diff --git a/arch/sparc64/kernel/pci_msi.c b/arch/sparc64/kernel/pci_msi.c
index 2e680f34f727..0d0cd815e83e 100644
--- a/arch/sparc64/kernel/pci_msi.c
+++ b/arch/sparc64/kernel/pci_msi.c
@@ -288,7 +288,7 @@ static int bringup_one_msi_queue(struct pci_pbm_info *pbm,
         if (nid != -1) {
                 cpumask_t numa_mask = node_to_cpumask(nid);
 
-                irq_set_affinity(irq, numa_mask);
+                irq_set_affinity(irq, &numa_mask);
         }
         err = request_irq(irq, sparc64_msiq_interrupt, 0,
                           "MSIQ",
diff --git a/arch/x86/kernel/hpet.c b/arch/x86/kernel/hpet.c
index 067d8de913f6..940f25851e1e 100644
--- a/arch/x86/kernel/hpet.c
+++ b/arch/x86/kernel/hpet.c
@@ -301,7 +301,7 @@ static void hpet_set_mode(enum clock_event_mode mode,
                         struct hpet_dev *hdev = EVT_TO_HPET_DEV(evt);
                         hpet_setup_msi_irq(hdev->irq);
                         disable_irq(hdev->irq);
-                        irq_set_affinity(hdev->irq, cpumask_of_cpu(hdev->cpu));
+                        irq_set_affinity(hdev->irq, cpumask_of(hdev->cpu));
                         enable_irq(hdev->irq);
                 }
                 break;
@@ -449,7 +449,7 @@ static int hpet_setup_irq(struct hpet_dev *dev)
                 return -1;
 
         disable_irq(dev->irq);
-        irq_set_affinity(dev->irq, cpumask_of_cpu(dev->cpu));
+        irq_set_affinity(dev->irq, cpumask_of(dev->cpu));
         enable_irq(dev->irq);
 
         printk(KERN_DEBUG "hpet: %s irq %d for MSI\n",
diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index 9043251210fb..1184210e6d0c 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -361,7 +361,8 @@ static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, u8 vector)
 
 static int assign_irq_vector(int irq, cpumask_t mask);
 
-static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
+static void set_ioapic_affinity_irq(unsigned int irq,
+                                    const struct cpumask *mask)
 {
         struct irq_cfg *cfg;
         unsigned long flags;
@@ -369,15 +370,14 @@ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
         cpumask_t tmp;
         struct irq_desc *desc;
 
-        cpus_and(tmp, mask, cpu_online_map);
-        if (cpus_empty(tmp))
+        if (!cpumask_intersects(mask, cpu_online_mask))
                 return;
 
         cfg = irq_cfg(irq);
-        if (assign_irq_vector(irq, mask))
+        if (assign_irq_vector(irq, *mask))
                 return;
 
-        cpus_and(tmp, cfg->domain, mask);
+        cpumask_and(&tmp, &cfg->domain, mask);
         dest = cpu_mask_to_apicid(tmp);
         /*
          * Only the high 8 bits are valid.
@@ -387,7 +387,7 @@ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
         desc = irq_to_desc(irq);
         spin_lock_irqsave(&ioapic_lock, flags);
         __target_IO_APIC_irq(irq, dest, cfg->vector);
-        desc->affinity = mask;
+        cpumask_copy(&desc->affinity, mask);
         spin_unlock_irqrestore(&ioapic_lock, flags);
 }
 #endif /* CONFIG_SMP */
@@ -2189,7 +2189,7 @@ static void ir_irq_migration(struct work_struct *work)
                                 continue;
                         }
 
-                        desc->chip->set_affinity(irq, desc->pending_mask);
+                        desc->chip->set_affinity(irq, &desc->pending_mask);
                         spin_unlock_irqrestore(&desc->lock, flags);
                 }
         }
@@ -2198,18 +2198,19 @@ static void ir_irq_migration(struct work_struct *work)
 /*
  * Migrates the IRQ destination in the process context.
  */
-static void set_ir_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
+static void set_ir_ioapic_affinity_irq(unsigned int irq,
+                                       const struct cpumask *mask)
 {
         struct irq_desc *desc = irq_to_desc(irq);
 
         if (desc->status & IRQ_LEVEL) {
                 desc->status |= IRQ_MOVE_PENDING;
-                desc->pending_mask = mask;
+                cpumask_copy(&desc->pending_mask, mask);
                 migrate_irq_remapped_level(irq);
                 return;
         }
 
-        migrate_ioapic_irq(irq, mask);
+        migrate_ioapic_irq(irq, *mask);
 }
 #endif
 
@@ -3027,7 +3028,7 @@ static int msi_compose_msg(struct pci_dev *pdev, unsigned int irq, struct msi_ms
 }
 
 #ifdef CONFIG_SMP
-static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
+static void set_msi_irq_affinity(unsigned int irq, const struct cpumask *mask)
 {
         struct irq_cfg *cfg;
         struct msi_msg msg;
@@ -3035,15 +3036,14 @@ static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
         cpumask_t tmp;
         struct irq_desc *desc;
 
-        cpus_and(tmp, mask, cpu_online_map);
-        if (cpus_empty(tmp))
+        if (!cpumask_intersects(mask, cpu_online_mask))
                 return;
 
-        if (assign_irq_vector(irq, mask))
+        if (assign_irq_vector(irq, *mask))
                 return;
 
         cfg = irq_cfg(irq);
-        cpus_and(tmp, cfg->domain, mask);
+        cpumask_and(&tmp, &cfg->domain, mask);
         dest = cpu_mask_to_apicid(tmp);
 
         read_msi_msg(irq, &msg);
@@ -3055,7 +3055,7 @@ static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
 
         write_msi_msg(irq, &msg);
         desc = irq_to_desc(irq);
-        desc->affinity = mask;
+        cpumask_copy(&desc->affinity, mask);
 }
 
 #ifdef CONFIG_INTR_REMAP
@@ -3063,7 +3063,8 @@ static void set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
  * Migrate the MSI irq to another cpumask. This migration is
  * done in the process context using interrupt-remapping hardware.
  */
-static void ir_set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
+static void ir_set_msi_irq_affinity(unsigned int irq,
+                                    const struct cpumask *mask)
 {
         struct irq_cfg *cfg;
         unsigned int dest;
@@ -3071,18 +3072,17 @@ static void ir_set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
         struct irte irte;
         struct irq_desc *desc;
 
-        cpus_and(tmp, mask, cpu_online_map);
-        if (cpus_empty(tmp))
+        if (!cpumask_intersects(mask, cpu_online_mask))
                 return;
 
         if (get_irte(irq, &irte))
                 return;
 
-        if (assign_irq_vector(irq, mask))
+        if (assign_irq_vector(irq, *mask))
                 return;
 
         cfg = irq_cfg(irq);
-        cpus_and(tmp, cfg->domain, mask);
+        cpumask_and(&tmp, &cfg->domain, mask);
         dest = cpu_mask_to_apicid(tmp);
 
         irte.vector = cfg->vector;
@@ -3106,7 +3106,7 @@ static void ir_set_msi_irq_affinity(unsigned int irq, cpumask_t mask)
         }
 
         desc = irq_to_desc(irq);
-        desc->affinity = mask;
+        cpumask_copy(&desc->affinity, mask);
 }
 #endif
 #endif /* CONFIG_SMP */
@@ -3308,7 +3308,7 @@ void arch_teardown_msi_irq(unsigned int irq)
 
 #ifdef CONFIG_DMAR
 #ifdef CONFIG_SMP
-static void dmar_msi_set_affinity(unsigned int irq, cpumask_t mask)
+static void dmar_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
         struct irq_cfg *cfg;
         struct msi_msg msg;
@@ -3316,15 +3316,14 @@ static void dmar_msi_set_affinity(unsigned int irq, cpumask_t mask)
         cpumask_t tmp;
         struct irq_desc *desc;
 
-        cpus_and(tmp, mask, cpu_online_map);
-        if (cpus_empty(tmp))
+        if (!cpumask_intersects(mask, cpu_online_mask))
                 return;
 
-        if (assign_irq_vector(irq, mask))
+        if (assign_irq_vector(irq, *mask))
                 return;
 
         cfg = irq_cfg(irq);
-        cpus_and(tmp, cfg->domain, mask);
+        cpumask_and(&tmp, &cfg->domain, mask);
         dest = cpu_mask_to_apicid(tmp);
 
         dmar_msi_read(irq, &msg);
@@ -3336,7 +3335,7 @@ static void dmar_msi_set_affinity(unsigned int irq, cpumask_t mask)
 
         dmar_msi_write(irq, &msg);
         desc = irq_to_desc(irq);
-        desc->affinity = mask;
+        cpumask_copy(&desc->affinity, mask);
 }
 #endif /* CONFIG_SMP */
 
@@ -3369,7 +3368,7 @@ int arch_setup_dmar_msi(unsigned int irq)
 #ifdef CONFIG_HPET_TIMER
 
 #ifdef CONFIG_SMP
-static void hpet_msi_set_affinity(unsigned int irq, cpumask_t mask)
+static void hpet_msi_set_affinity(unsigned int irq, const struct cpumask *mask)
 {
         struct irq_cfg *cfg;
         struct irq_desc *desc;
@@ -3377,15 +3376,14 @@ static void hpet_msi_set_affinity(unsigned int irq, cpumask_t mask)
         unsigned int dest;
         cpumask_t tmp;
 
-        cpus_and(tmp, mask, cpu_online_map);
-        if (cpus_empty(tmp))
+        if (!cpumask_intersects(mask, cpu_online_mask))
                 return;
 
-        if (assign_irq_vector(irq, mask))
+        if (assign_irq_vector(irq, *mask))
                 return;
 
         cfg = irq_cfg(irq);
-        cpus_and(tmp, cfg->domain, mask);
+        cpumask_and(&tmp, &cfg->domain, mask);
         dest = cpu_mask_to_apicid(tmp);
 
         hpet_msi_read(irq, &msg);
@@ -3397,7 +3395,7 @@ static void hpet_msi_set_affinity(unsigned int irq, cpumask_t mask)
 
         hpet_msi_write(irq, &msg);
         desc = irq_to_desc(irq);
-        desc->affinity = mask;
+        cpumask_copy(&desc->affinity, mask);
 }
 #endif /* CONFIG_SMP */
 
@@ -3451,27 +3449,26 @@ static void target_ht_irq(unsigned int irq, unsigned int dest, u8 vector)
         write_ht_irq_msg(irq, &msg);
 }
 
-static void set_ht_irq_affinity(unsigned int irq, cpumask_t mask)
+static void set_ht_irq_affinity(unsigned int irq, const struct cpumask *mask)
 {
         struct irq_cfg *cfg;
         unsigned int dest;
         cpumask_t tmp;
         struct irq_desc *desc;
 
-        cpus_and(tmp, mask, cpu_online_map);
-        if (cpus_empty(tmp))
+        if (!cpumask_intersects(mask, cpu_online_mask))
                 return;
 
-        if (assign_irq_vector(irq, mask))
+        if (assign_irq_vector(irq, *mask))
                 return;
 
         cfg = irq_cfg(irq);
-        cpus_and(tmp, cfg->domain, mask);
+        cpumask_and(&tmp, &cfg->domain, mask);
         dest = cpu_mask_to_apicid(tmp);
 
         target_ht_irq(irq, dest, cfg->vector);
         desc = irq_to_desc(irq);
-        desc->affinity = mask;
+        cpumask_copy(&desc->affinity, mask);
 }
 #endif
 
@@ -3794,10 +3791,10 @@ void __init setup_ioapic_dest(void)
 
 #ifdef CONFIG_INTR_REMAP
                         if (intr_remapping_enabled)
-                                set_ir_ioapic_affinity_irq(irq, mask);
+                                set_ir_ioapic_affinity_irq(irq, &mask);
                         else
 #endif
-                                set_ioapic_affinity_irq(irq, mask);
+                                set_ioapic_affinity_irq(irq, &mask);
                 }
 
         }
diff --git a/arch/x86/kernel/irq_32.c b/arch/x86/kernel/irq_32.c
index a51382672de0..87870a49be4e 100644
--- a/arch/x86/kernel/irq_32.c
+++ b/arch/x86/kernel/irq_32.c
@@ -251,7 +251,7 @@ void fixup_irqs(cpumask_t map)
                         mask = map;
                 }
                 if (desc->chip->set_affinity)
-                        desc->chip->set_affinity(irq, mask);
+                        desc->chip->set_affinity(irq, &mask);
                 else if (desc->action && !(warned++))
                         printk("Cannot set affinity for irq %i\n", irq);
         }
diff --git a/arch/x86/kernel/irq_64.c b/arch/x86/kernel/irq_64.c
index 60eb84eb77a0..7d37f847544d 100644
--- a/arch/x86/kernel/irq_64.c
+++ b/arch/x86/kernel/irq_64.c
@@ -116,7 +116,7 @@ void fixup_irqs(cpumask_t map)
                         desc->chip->mask(irq);
 
                 if (desc->chip->set_affinity)
-                        desc->chip->set_affinity(irq, mask);
+                        desc->chip->set_affinity(irq, &mask);
                 else if (!(warned++))
                         set_affinity = 0;
 
diff --git a/drivers/parisc/iosapic.c b/drivers/parisc/iosapic.c
index 7beffcab2745..9dedbbd218c3 100644
--- a/drivers/parisc/iosapic.c
+++ b/drivers/parisc/iosapic.c
@@ -704,16 +704,17 @@ static unsigned int iosapic_startup_irq(unsigned int irq)
 }
 
 #ifdef CONFIG_SMP
-static void iosapic_set_affinity_irq(unsigned int irq, cpumask_t dest)
+static void iosapic_set_affinity_irq(unsigned int irq,
+                                     const struct cpumask *dest)
 {
         struct vector_info *vi = iosapic_get_vector(irq);
         u32 d0, d1, dummy_d0;
         unsigned long flags;
 
-        if (cpu_check_affinity(irq, &dest))
+        if (cpu_check_affinity(irq, dest))
                 return;
 
-        vi->txn_addr = txn_affinity_addr(irq, first_cpu(dest));
+        vi->txn_addr = txn_affinity_addr(irq, cpumask_first(dest));
 
         spin_lock_irqsave(&iosapic_lock, flags);
         /* d1 contains the destination CPU, so only want to set that
diff --git a/drivers/xen/events.c b/drivers/xen/events.c
index 1e3b934a4cf7..eba5ec5b020e 100644
--- a/drivers/xen/events.c
+++ b/drivers/xen/events.c
@@ -579,7 +579,7 @@ void rebind_evtchn_irq(int evtchn, int irq)
         spin_unlock(&irq_mapping_update_lock);
 
         /* new event channels are always bound to cpu 0 */
-        irq_set_affinity(irq, cpumask_of_cpu(0));
+        irq_set_affinity(irq, cpumask_of(0));
 
         /* Unmask the event channel. */
         enable_irq(irq);
@@ -608,9 +608,9 @@ static void rebind_irq_to_cpu(unsigned irq, unsigned tcpu)
 }
 
 
-static void set_affinity_irq(unsigned irq, cpumask_t dest)
+static void set_affinity_irq(unsigned irq, const struct cpumask *dest)
 {
-        unsigned tcpu = first_cpu(dest);
+        unsigned tcpu = cpumask_first(dest);
         rebind_irq_to_cpu(irq, tcpu);
 }
 
diff --git a/include/linux/interrupt.h b/include/linux/interrupt.h
index f58a0cf8929a..48e63934fabe 100644
--- a/include/linux/interrupt.h
+++ b/include/linux/interrupt.h
@@ -109,13 +109,13 @@ extern void enable_irq(unsigned int irq);
 
 extern cpumask_t irq_default_affinity;
 
-extern int irq_set_affinity(unsigned int irq, cpumask_t cpumask);
+extern int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask);
 extern int irq_can_set_affinity(unsigned int irq);
 extern int irq_select_affinity(unsigned int irq);
 
 #else /* CONFIG_SMP */
 
-static inline int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
+static inline int irq_set_affinity(unsigned int irq, const struct cpumask *m)
 {
         return -EINVAL;
 }
diff --git a/include/linux/irq.h b/include/linux/irq.h
index 3dddfa703ebd..ab70fd604d3a 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -113,7 +113,8 @@ struct irq_chip {
         void            (*eoi)(unsigned int irq);
 
         void            (*end)(unsigned int irq);
-        void            (*set_affinity)(unsigned int irq, cpumask_t dest);
+        void            (*set_affinity)(unsigned int irq,
+                                        const struct cpumask *dest);
         int             (*retrigger)(unsigned int irq);
         int             (*set_type)(unsigned int irq, unsigned int flow_type);
         int             (*set_wake)(unsigned int irq, unsigned int on);
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 10b5092e9bfe..58d8e31daa49 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -45,7 +45,7 @@ void dynamic_irq_init(unsigned int irq)
         desc->irq_count = 0;
         desc->irqs_unhandled = 0;
 #ifdef CONFIG_SMP
-        cpus_setall(desc->affinity);
+        cpumask_setall(&desc->affinity);
 #endif
         spin_unlock_irqrestore(&desc->lock, flags);
 }
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 801addda3c43..10ad2f87ed9a 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -79,7 +79,7 @@ int irq_can_set_affinity(unsigned int irq)
  *      @cpumask:       cpumask
  *
  */
-int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
+int irq_set_affinity(unsigned int irq, const struct cpumask *cpumask)
 {
         struct irq_desc *desc = irq_to_desc(irq);
         unsigned long flags;
@@ -91,14 +91,14 @@ int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
 
 #ifdef CONFIG_GENERIC_PENDING_IRQ
         if (desc->status & IRQ_MOVE_PCNTXT || desc->status & IRQ_DISABLED) {
-                desc->affinity = cpumask;
+                cpumask_copy(&desc->affinity, cpumask);
                 desc->chip->set_affinity(irq, cpumask);
         } else {
                 desc->status |= IRQ_MOVE_PENDING;
-                desc->pending_mask = cpumask;
+                cpumask_copy(&desc->pending_mask, cpumask);
         }
 #else
-        desc->affinity = cpumask;
+        cpumask_copy(&desc->affinity, cpumask);
         desc->chip->set_affinity(irq, cpumask);
 #endif
         desc->status |= IRQ_AFFINITY_SET;
@@ -112,26 +112,24 @@ int irq_set_affinity(unsigned int irq, cpumask_t cpumask)
  */
 int do_irq_select_affinity(unsigned int irq, struct irq_desc *desc)
 {
-        cpumask_t mask;
-
         if (!irq_can_set_affinity(irq))
                 return 0;
 
-        cpus_and(mask, cpu_online_map, irq_default_affinity);
-
         /*
          * Preserve an userspace affinity setup, but make sure that
          * one of the targets is online.
          */
         if (desc->status & (IRQ_AFFINITY_SET | IRQ_NO_BALANCING)) {
-                if (cpus_intersects(desc->affinity, cpu_online_map))
-                        mask = desc->affinity;
+                if (cpumask_any_and(&desc->affinity, cpu_online_mask)
+                    < nr_cpu_ids)
+                        goto set_affinity;
                 else
                         desc->status &= ~IRQ_AFFINITY_SET;
         }
 
-        desc->affinity = mask;
-        desc->chip->set_affinity(irq, mask);
+        cpumask_and(&desc->affinity, cpu_online_mask, &irq_default_affinity);
+set_affinity:
+        desc->chip->set_affinity(irq, &desc->affinity);
 
         return 0;
 }
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index 9db681d95814..bd72329e630c 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -4,7 +4,6 @@
 void move_masked_irq(int irq)
 {
         struct irq_desc *desc = irq_to_desc(irq);
-        cpumask_t tmp;
 
         if (likely(!(desc->status & IRQ_MOVE_PENDING)))
                 return;
@@ -19,7 +18,7 @@ void move_masked_irq(int irq)
 
         desc->status &= ~IRQ_MOVE_PENDING;
 
-        if (unlikely(cpus_empty(desc->pending_mask)))
+        if (unlikely(cpumask_empty(&desc->pending_mask)))
                 return;
 
         if (!desc->chip->set_affinity)
@@ -27,8 +26,6 @@ void move_masked_irq(int irq)
 
         assert_spin_locked(&desc->lock);
 
-        cpus_and(tmp, desc->pending_mask, cpu_online_map);
-
         /*
          * If there was a valid mask to work with, please
          * do the disable, re-program, enable sequence.
@@ -41,10 +38,13 @@ void move_masked_irq(int irq)
          * For correct operation this depends on the caller
          * masking the irqs.
          */
-        if (likely(!cpus_empty(tmp))) {
-                desc->chip->set_affinity(irq,tmp);
+        if (likely(cpumask_any_and(&desc->pending_mask, cpu_online_mask)
+                   < nr_cpu_ids)) {
+                cpumask_and(&desc->affinity,
+                            &desc->pending_mask, cpu_online_mask);
+                desc->chip->set_affinity(irq, &desc->affinity);
         }
-        cpus_clear(desc->pending_mask);
+        cpumask_clear(&desc->pending_mask);
 }
 
 void move_native_irq(int irq)
diff --git a/kernel/irq/proc.c b/kernel/irq/proc.c
index f293349d49d0..8e91c9762520 100644
--- a/kernel/irq/proc.c
+++ b/kernel/irq/proc.c
@@ -40,33 +40,42 @@ static ssize_t irq_affinity_proc_write(struct file *file,
                 const char __user *buffer, size_t count, loff_t *pos)
 {
         unsigned int irq = (int)(long)PDE(file->f_path.dentry->d_inode)->data;
-        cpumask_t new_value;
+        cpumask_var_t new_value;
         int err;
 
         if (!irq_to_desc(irq)->chip->set_affinity || no_irq_affinity ||
             irq_balancing_disabled(irq))
                 return -EIO;
 
-        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 free_cpumask;
 
-        if (!is_affinity_mask_valid(new_value))
-                return -EINVAL;
+        if (!is_affinity_mask_valid(*new_value)) {
+                err = -EINVAL;
+                goto free_cpumask;
+        }
 
         /*
          * 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))
+        if (!cpumask_intersects(new_value, cpu_online_mask)) {
                 /* Special case for empty set - allow the architecture
                    code to set default SMP affinity. */
-                return irq_select_affinity_usr(irq) ? -EINVAL : count;
-
-        irq_set_affinity(irq, new_value);
+                err = irq_select_affinity_usr(irq) ? -EINVAL : count;
+        } else {
+                irq_set_affinity(irq, new_value);
+                err = count;
+        }
 
-        return count;
+free_cpumask:
+        free_cpumask_var(new_value);
+        return err;
 }
 
 static int irq_affinity_proc_open(struct inode *inode, struct file *file)
diff --git a/kernel/time/tick-common.c b/kernel/time/tick-common.c
index df12434b43ca..ab65d217583f 100644
--- a/kernel/time/tick-common.c
+++ b/kernel/time/tick-common.c
@@ -136,7 +136,7 @@ void tick_setup_periodic(struct clock_event_device *dev, int broadcast)
  */
 static void tick_setup_device(struct tick_device *td,
                               struct clock_event_device *newdev, int cpu,
-                              const cpumask_t *cpumask)
+                              const struct cpumask *cpumask)
 {
         ktime_t next_event;
         void (*handler)(struct clock_event_device *) = NULL;
@@ -171,8 +171,8 @@ static void tick_setup_device(struct tick_device *td,
          * When the device is not per cpu, pin the interrupt to the
          * current cpu:
          */
-        if (!cpus_equal(newdev->cpumask, *cpumask))
-                irq_set_affinity(newdev->irq, *cpumask);
+        if (!cpumask_equal(&newdev->cpumask, cpumask))
+                irq_set_affinity(newdev->irq, cpumask);
 
         /*
          * When global broadcasting is active, check if the current