3 files changed, 222 insertions, 154 deletions

diff --git a/arch/x86/kernel/io_apic.c b/arch/x86/kernel/io_apic.c
index 0dcde74abd1d..a1a2e070f31a 100644
--- a/arch/x86/kernel/io_apic.c
+++ b/arch/x86/kernel/io_apic.c
@@ -231,6 +231,10 @@ static struct irq_cfg *irq_cfg(unsigned int irq)
 
 #endif
 
+static inline void set_extra_move_desc(struct irq_desc *desc, cpumask_t mask)
+{
+}
+
 struct io_apic {
         unsigned int index;
         unsigned int unused[3];
@@ -272,11 +276,10 @@ static inline void io_apic_modify(unsigned int apic, unsigned int reg, unsigned
         writel(value, &io_apic->data);
 }
 
-static bool io_apic_level_ack_pending(unsigned int irq)
+static bool io_apic_level_ack_pending(struct irq_cfg *cfg)
 {
         struct irq_pin_list *entry;
         unsigned long flags;
-        struct irq_cfg *cfg = irq_cfg(irq);
 
         spin_lock_irqsave(&ioapic_lock, flags);
         entry = cfg->irq_2_pin;
@@ -358,13 +361,12 @@ static void ioapic_mask_entry(int apic, int pin)
 }
 
 #ifdef CONFIG_SMP
-static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, u8 vector)
+static void __target_IO_APIC_irq(unsigned int irq, unsigned int dest, struct irq_cfg *cfg)
 {
         int apic, pin;
-        struct irq_cfg *cfg;
         struct irq_pin_list *entry;
+        u8 vector = cfg->vector;
 
-        cfg = irq_cfg(irq);
         entry = cfg->irq_2_pin;
         for (;;) {
                 unsigned int reg;
@@ -394,24 +396,27 @@ 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 int assign_irq_vector(int irq, struct irq_cfg *cfg, cpumask_t mask);
 
-static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
+static void set_ioapic_affinity_irq_desc(struct irq_desc *desc, cpumask_t mask)
 {
         struct irq_cfg *cfg;
         unsigned long flags;
         unsigned int dest;
         cpumask_t tmp;
-        struct irq_desc *desc;
+        unsigned int irq;
 
         cpus_and(tmp, mask, cpu_online_map);
         if (cpus_empty(tmp))
                 return;
 
-        cfg = irq_cfg(irq);
-        if (assign_irq_vector(irq, mask))
+        irq = desc->irq;
+        cfg = desc->chip_data;
+        if (assign_irq_vector(irq, cfg, mask))
                 return;
 
+        set_extra_move_desc(desc, mask);
+
         cpus_and(tmp, cfg->domain, mask);
         dest = cpu_mask_to_apicid(tmp);
         /*
@@ -419,12 +424,20 @@ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
          */
         dest = SET_APIC_LOGICAL_ID(dest);
 
-        desc = irq_to_desc(irq);
         spin_lock_irqsave(&ioapic_lock, flags);
-        __target_IO_APIC_irq(irq, dest, cfg->vector);
+        __target_IO_APIC_irq(irq, dest, cfg);
         desc->affinity = mask;
         spin_unlock_irqrestore(&ioapic_lock, flags);
 }
+
+static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
+{
+        struct irq_desc *desc;
+
+        desc = irq_to_desc(irq);
+
+        set_ioapic_affinity_irq_desc(desc, mask);
+}
 #endif /* CONFIG_SMP */
 
 /*
@@ -432,10 +445,9 @@ static void set_ioapic_affinity_irq(unsigned int irq, cpumask_t mask)
  * shared ISA-space IRQs, so we have to support them. We are super
  * fast in the common case, and fast for shared ISA-space IRQs.
  */
-static void add_pin_to_irq_cpu(unsigned int irq, int cpu, int apic, int pin)
+static void add_pin_to_irq_cpu(struct irq_cfg *cfg, int cpu, int apic, int pin)
 {
         struct irq_pin_list *entry;
-        struct irq_cfg *cfg = irq_cfg(irq);
 
         entry = cfg->irq_2_pin;
         if (!entry) {
@@ -468,11 +480,10 @@ static void add_pin_to_irq_cpu(unsigned int irq, int cpu, int apic, int pin)
 /*
  * Reroute an IRQ to a different pin.
  */
-static void __init replace_pin_at_irq(unsigned int irq, int cpu,
+static void __init replace_pin_at_irq_cpu(struct irq_cfg *cfg, int cpu,
                                       int oldapic, int oldpin,
                                       int newapic, int newpin)
 {
-        struct irq_cfg *cfg = irq_cfg(irq);
         struct irq_pin_list *entry = cfg->irq_2_pin;
         int replaced = 0;
 
@@ -489,18 +500,16 @@ static void __init replace_pin_at_irq(unsigned int irq, int cpu,
 
         /* why? call replace before add? */
         if (!replaced)
-                add_pin_to_irq_cpu(irq, cpu, newapic, newpin);
+                add_pin_to_irq_cpu(cfg, cpu, newapic, newpin);
 }
 
-static inline void io_apic_modify_irq(unsigned int irq,
+static inline void io_apic_modify_irq(struct irq_cfg *cfg,
                                 int mask_and, int mask_or,
                                 void (*final)(struct irq_pin_list *entry))
 {
         int pin;
-        struct irq_cfg *cfg;
         struct irq_pin_list *entry;
 
-        cfg = irq_cfg(irq);
         for (entry = cfg->irq_2_pin; entry != NULL; entry = entry->next) {
                 unsigned int reg;
                 pin = entry->pin;
@@ -513,9 +522,9 @@ static inline void io_apic_modify_irq(unsigned int irq,
         }
 }
 
-static void __unmask_IO_APIC_irq(unsigned int irq)
+static void __unmask_IO_APIC_irq(struct irq_cfg *cfg)
 {
-        io_apic_modify_irq(irq, ~IO_APIC_REDIR_MASKED, 0, NULL);
+        io_apic_modify_irq(cfg, ~IO_APIC_REDIR_MASKED, 0, NULL);
 }
 
 #ifdef CONFIG_X86_64
@@ -530,47 +539,64 @@ void io_apic_sync(struct irq_pin_list *entry)
         readl(&io_apic->data);
 }