5 files changed, 41 insertions, 28 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index 48cb7d1aa58f..3c7fbe44edae 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -126,13 +126,21 @@ struct msi_desc;
 struct irq_domain;
 
 /**
- * struct irq_data - per irq and irq chip data passed down to chip functions
+ * struct irq_common_data - per irq data shared by all irqchips
+ * @state_use_accessors: status information for irq chip functions.
+ *                      Use accessor functions to deal with it
+ */
+struct irq_common_data {
+        unsigned int            state_use_accessors;
+};
+
+/**
+ * struct irq_data - per irq chip data passed down to chip functions
  * @mask:               precomputed bitmask for accessing the chip registers
  * @irq:                interrupt number
  * @hwirq:              hardware interrupt number, local to the interrupt domain
  * @node:               node index useful for balancing
- * @state_use_accessors: status information for irq chip functions.
- *                      Use accessor functions to deal with it
+ * @common:             point to data shared by all irqchips
  * @chip:               low level interrupt hardware access
  * @domain:             Interrupt translation domain; responsible for mapping
  *                      between hwirq number and linux irq number.
@@ -153,7 +161,7 @@ struct irq_data {
         unsigned int            irq;
         unsigned long           hwirq;
         unsigned int            node;
-        unsigned int            state_use_accessors;
+        struct irq_common_data  *common;
         struct irq_chip         *chip;
         struct irq_domain       *domain;
 #ifdef  CONFIG_IRQ_DOMAIN_HIERARCHY
@@ -166,7 +174,7 @@ struct irq_data {
 };
 
 /*
- * Bit masks for irq_data.state
+ * Bit masks for irq_common_data.state_use_accessors
  *
  * IRQD_TRIGGER_MASK            - Mask for the trigger type bits
  * IRQD_SETAFFINITY_PENDING     - Affinity setting is pending
@@ -198,34 +206,36 @@ enum {
         IRQD_WAKEUP_ARMED               = (1 << 19),
 };
 
+#define __irqd_to_state(d)              ((d)->common->state_use_accessors)
+
 static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_SETAFFINITY_PENDING;
+        return __irqd_to_state(d) & IRQD_SETAFFINITY_PENDING;
 }
 
 static inline bool irqd_is_per_cpu(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_PER_CPU;
+        return __irqd_to_state(d) & IRQD_PER_CPU;
 }
 
 static inline bool irqd_can_balance(struct irq_data *d)
 {
-        return !(d->state_use_accessors & (IRQD_PER_CPU | IRQD_NO_BALANCING));
+        return !(__irqd_to_state(d) & (IRQD_PER_CPU | IRQD_NO_BALANCING));
 }
 
 static inline bool irqd_affinity_was_set(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_AFFINITY_SET;
+        return __irqd_to_state(d) & IRQD_AFFINITY_SET;
 }
 
 static inline void irqd_mark_affinity_was_set(struct irq_data *d)
 {
-        d->state_use_accessors |= IRQD_AFFINITY_SET;
+        __irqd_to_state(d) |= IRQD_AFFINITY_SET;
 }
 
 static inline u32 irqd_get_trigger_type(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_TRIGGER_MASK;
+        return __irqd_to_state(d) & IRQD_TRIGGER_MASK;
 }
 
 /*
@@ -233,43 +243,43 @@ static inline u32 irqd_get_trigger_type(struct irq_data *d)
  */
 static inline void irqd_set_trigger_type(struct irq_data *d, u32 type)
 {
-        d->state_use_accessors &= ~IRQD_TRIGGER_MASK;
-        d->state_use_accessors |= type & IRQD_TRIGGER_MASK;
+        __irqd_to_state(d) &= ~IRQD_TRIGGER_MASK;
+        __irqd_to_state(d) |= type & IRQD_TRIGGER_MASK;
 }
 
 static inline bool irqd_is_level_type(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_LEVEL;
+        return __irqd_to_state(d) & IRQD_LEVEL;
 }
 
 static inline bool irqd_is_wakeup_set(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_WAKEUP_STATE;
+        return __irqd_to_state(d) & IRQD_WAKEUP_STATE;
 }
 
 static inline bool irqd_can_move_in_process_context(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_MOVE_PCNTXT;
+        return __irqd_to_state(d) & IRQD_MOVE_PCNTXT;
 }
 
 static inline bool irqd_irq_disabled(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_IRQ_DISABLED;
+        return __irqd_to_state(d) & IRQD_IRQ_DISABLED;
 }
 
 static inline bool irqd_irq_masked(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_IRQ_MASKED;
+        return __irqd_to_state(d) & IRQD_IRQ_MASKED;
 }
 
 static inline bool irqd_irq_inprogress(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_IRQ_INPROGRESS;
+        return __irqd_to_state(d) & IRQD_IRQ_INPROGRESS;
 }
 
 static inline bool irqd_is_wakeup_armed(struct irq_data *d)
 {
-        return d->state_use_accessors & IRQD_WAKEUP_ARMED;
+        return __irqd_to_state(d) & IRQD_WAKEUP_ARMED;
 }
 
 
@@ -280,12 +290,12 @@ static inline bool irqd_is_wakeup_armed(struct irq_data *d)
  */
 static inline void irqd_set_chained_irq_inprogress(struct irq_data *d)
 {
-        d->state_use_accessors |= IRQD_IRQ_INPROGRESS;
+        __irqd_to_state(d) |= IRQD_IRQ_INPROGRESS;
 }
 
 static inline void irqd_clr_chained_irq_inprogress(struct irq_data *d)
 {
-        d->state_use_accessors &= ~IRQD_IRQ_INPROGRESS;
+        __irqd_to_state(d) &= ~IRQD_IRQ_INPROGRESS;
 }
 
 static inline irq_hw_number_t irqd_to_hwirq(struct irq_data *d)
diff --git a/include/linux/irqdesc.h b/include/linux/irqdesc.h
index a113a8dc7438..c52d1480f272 100644
--- a/include/linux/irqdesc.h
+++ b/include/linux/irqdesc.h
@@ -17,7 +17,7 @@ struct pt_regs;
 
 /**
  * struct irq_desc - interrupt descriptor
- * @irq_data:           per irq and chip data passed down to chip functions
+ * @irq_common_data:    per irq and chip data passed down to chip functions
  * @kstat_irqs:         irq stats per cpu
  * @handle_irq:         highlevel irq-events handler
  * @preflow_handler:    handler called before the flow handler (currently used by sparc)
@@ -47,6 +47,7 @@ struct pt_regs;
  * @name:               flow handler name for /proc/interrupts output
  */
 struct irq_desc {
+        struct irq_common_data  irq_common_data;
         struct irq_data         irq_data;
         unsigned int __percpu   *kstat_irqs;
         irq_flow_handler_t      handle_irq;
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index b93d434e70bd..a1ed80d11800 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -168,27 +168,27 @@ irq_put_desc_unlock(struct irq_desc *desc, unsigned long flags)
  */
 static inline void irqd_set_move_pending(struct irq_data *d)
 {
-        d->state_use_accessors |= IRQD_SETAFFINITY_PENDING;
+        __irqd_to_state(d) |= IRQD_SETAFFINITY_PENDING;
 }
 
 static inline void irqd_clr_move_pending(struct irq_data *d)
 {
-        d->state_use_accessors &= ~IRQD_SETAFFINITY_PENDING;
+        __irqd_to_state(d) &= ~IRQD_SETAFFINITY_PENDING;
 }
 
 static inline void irqd_clear(struct irq_data *d, unsigned int mask)
 {
-        d->state_use_accessors &= ~mask;
+        __irqd_to_state(d) &= ~mask;
 }
 
 static inline void irqd_set(struct irq_data *d, unsigned int mask)
 {
-        d->state_use_accessors |= mask;
+        __irqd_to_state(d) |= mask;
 }
 
 static inline bool irqd_has_set(struct irq_data *d, unsigned int mask)
 {
-        return d->state_use_accessors & mask;
+        return __irqd_to_state(d) & mask;
 }
 
 static inline void kstat_incr_irqs_this_cpu(unsigned int irq, struct irq_desc *desc)
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 99793b9b6d23..eac1aac906ea 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -76,6 +76,7 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node,
 {
         int cpu;
 
+        desc->irq_data.common = &desc->irq_common_data;
         desc->irq_data.irq = irq;
         desc->irq_data.chip = &no_irq_chip;
         desc->irq_data.chip_data = NULL;
diff --git a/kernel/irq/irqdomain.c b/kernel/irq/irqdomain.c
index 7fac311057b8..3552b8750efd 100644
--- a/kernel/irq/irqdomain.c
+++ b/kernel/irq/irqdomain.c
@@ -834,6 +834,7 @@ static struct irq_data *irq_domain_insert_irq_data(struct irq_domain *domain,
         if (irq_data) {
                 child->parent_data = irq_data;
                 irq_data->irq = child->irq;
+                irq_data->common = child->common;
                 irq_data->node = child->node;
                 irq_data->domain = domain;
         }