9 files changed, 64 insertions, 59 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index a10717e1c1f..18aacccb0fa 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -174,8 +174,9 @@ struct irq_data {
  *                                from suspend
  * IRDQ_MOVE_PCNTXT             - Interrupt can be moved in process
  *                                context
- * IRQD_IRQ_DISABLED            - Some chip function need to know the
- *                                disabled state.
+ * IRQD_IRQ_DISABLED            - Disabled state of the interrupt
+ * IRQD_IRQ_MASKED              - Masked state of the interrupt
+ * IRQD_IRQ_INPROGRESS          - In progress state of the interrupt
  */
 enum {
         IRQD_TRIGGER_MASK               = 0xf,
@@ -187,6 +188,8 @@ enum {
         IRQD_WAKEUP_STATE               = (1 << 14),
         IRQD_MOVE_PCNTXT                = (1 << 15),
         IRQD_IRQ_DISABLED               = (1 << 16),
+        IRQD_IRQ_MASKED                 = (1 << 17),
+        IRQD_IRQ_INPROGRESS             = (1 << 18),
 };
 
 static inline bool irqd_is_setaffinity_pending(struct irq_data *d)
@@ -243,6 +246,16 @@ static inline bool irqd_irq_disabled(struct irq_data *d)
         return d->state_use_accessors & IRQD_IRQ_DISABLED;
 }
 
+static inline bool irqd_irq_masked(struct irq_data *d)
+{
+        return d->state_use_accessors & IRQD_IRQ_MASKED;
+}
+
+static inline bool irqd_irq_inprogress(struct irq_data *d)
+{
+        return d->state_use_accessors & IRQD_IRQ_INPROGRESS;
+}
+
 /**
  * struct irq_chip - hardware interrupt chip descriptor
  *
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 9283d3300ea..e00bdc56269 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -140,27 +140,25 @@ EXPORT_SYMBOL_GPL(irq_get_irq_data);
 
 static void irq_state_clr_disabled(struct irq_desc *desc)
 {
-        desc->istate &= ~IRQS_DISABLED;
         irqd_clear(&desc->irq_data, IRQD_IRQ_DISABLED);
         irq_compat_clr_disabled(desc);
 }
 
 static void irq_state_set_disabled(struct irq_desc *desc)
 {
-        desc->istate |= IRQS_DISABLED;
         irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED);
         irq_compat_set_disabled(desc);
 }
 
 static void irq_state_clr_masked(struct irq_desc *desc)
 {
-        desc->istate &= ~IRQS_MASKED;
+        irqd_clear(&desc->irq_data, IRQD_IRQ_MASKED);
         irq_compat_clr_masked(desc);
 }
 
 static void irq_state_set_masked(struct irq_desc *desc)
 {
-        desc->istate |= IRQS_MASKED;
+        irqd_set(&desc->irq_data, IRQD_IRQ_MASKED);
         irq_compat_set_masked(desc);
 }
 
@@ -380,11 +378,11 @@ void handle_nested_irq(unsigned int irq)
         kstat_incr_irqs_this_cpu(irq, desc);
 
         action = desc->action;
-        if (unlikely(!action || (desc->istate & IRQS_DISABLED)))
+        if (unlikely(!action || irqd_irq_disabled(&desc->irq_data)))
                 goto out_unlock;
 
         irq_compat_set_progress(desc);
-        desc->istate |= IRQS_INPROGRESS;
+        irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
         raw_spin_unlock_irq(&desc->lock);
 
         action_ret = action->thread_fn(action->irq, action->dev_id);
@@ -392,7 +390,7 @@ void handle_nested_irq(unsigned int irq)
                 note_interrupt(irq, desc, action_ret);
 
         raw_spin_lock_irq(&desc->lock);
-        desc->istate &= ~IRQS_INPROGRESS;
+        irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
         irq_compat_clr_progress(desc);
 
 out_unlock:
@@ -424,14 +422,14 @@ handle_simple_irq(unsigned int irq, struct irq_desc *desc)
 {
         raw_spin_lock(&desc->lock);
 
-        if (unlikely(desc->istate & IRQS_INPROGRESS))
+        if (unlikely(irqd_irq_inprogress(&desc->irq_data)))
                 if (!irq_check_poll(desc))
                         goto out_unlock;
 
         desc->istate &= ~(IRQS_REPLAY | IRQS_WAITING);
         kstat_incr_irqs_this_cpu(irq, desc);
 
-        if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED)))
+        if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data)))
                 goto out_unlock;
 
         handle_irq_event(desc);
@@ -456,7 +454,7 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
         raw_spin_lock(&desc->lock);
         mask_ack_irq(desc);
 
-        if (unlikely(desc->istate & IRQS_INPROGRESS))
+        if (unlikely(irqd_irq_inprogress(&desc->irq_data)))
                 if (!irq_check_poll(desc))
                         goto out_unlock;
 
@@ -467,12 +465,12 @@ handle_level_irq(unsigned int irq, struct irq_desc *desc)
          * If its disabled or no action available
          * keep it masked and get out of here
          */
-        if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED)))
+        if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data)))
                 goto out_unlock;
 
         handle_irq_event(desc);
 
-        if (!(desc->istate & (IRQS_DISABLED | IRQS_ONESHOT)))
+        if (!irqd_irq_disabled(&desc->irq_data) && !(desc->istate & IRQS_ONESHOT))
                 unmask_irq(desc);
 out_unlock:
         raw_spin_unlock(&desc->lock);
@@ -504,7 +502,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
 {
         raw_spin_lock(&desc->lock);
 
-        if (unlikely(desc->istate & IRQS_INPROGRESS))
+        if (unlikely(irqd_irq_inprogress(&desc->irq_data)))
                 if (!irq_check_poll(desc))
                         goto out;
 
@@ -515,7 +513,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
          * If its disabled or no action available
          * then mask it and get out of here:
          */
-        if (unlikely(!desc->action || (desc->istate & IRQS_DISABLED))) {
+        if (unlikely(!desc->action || irqd_irq_disabled(&desc->irq_data))) {
                 irq_compat_set_pending(desc);
                 desc->istate |= IRQS_PENDING;
                 mask_irq(desc);
@@ -566,8 +564,8 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
          * we shouldn't process the IRQ. Mark it pending, handle
          * the necessary masking and go out
          */
-        if (unlikely((desc->istate & (IRQS_DISABLED | IRQS_INPROGRESS) ||
-                      !desc->action))) {
+        if (unlikely(irqd_irq_disabled(&desc->irq_data) ||
+                     irqd_irq_inprogress(&desc->irq_data) || !desc->action)) {
                 if (!irq_check_poll(desc)) {
                         irq_compat_set_pending(desc);
                         desc->istate |= IRQS_PENDING;
@@ -592,15 +590,15 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
                  * Renable it, if it was not disabled in meantime.
                  */
                 if (unlikely(desc->istate & IRQS_PENDING)) {
-                        if (!(desc->istate & IRQS_DISABLED) &&
-                            (desc->istate & IRQS_MASKED))
+                        if (!irqd_irq_disabled(&desc->irq_data) &&
+                            irqd_irq_masked(&desc->irq_data))
                                 unmask_irq(desc);
                 }
 
                 handle_irq_event(desc);
 
         } while ((desc->istate & IRQS_PENDING) &&
-                 !(desc->istate & IRQS_DISABLED));
+                 !irqd_irq_disabled(&desc->irq_data));
 
 out_unlock:
         raw_spin_unlock(&desc->lock);
@@ -720,7 +718,7 @@ void irq_cpu_online(void)
                 chip = irq_data_get_irq_chip(&desc->irq_data);
                 if (chip && chip->irq_cpu_online &&
                     (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
-                     !(desc->istate & IRQS_DISABLED)))
+                     !irqd_irq_disabled(&desc->irq_data)))
                         chip->irq_cpu_online(&desc->irq_data);
 
                 raw_spin_unlock_irqrestore(&desc->lock, flags);
@@ -750,7 +748,7 @@ void irq_cpu_offline(void)
                 chip = irq_data_get_irq_chip(&desc->irq_data);
                 if (chip && chip->irq_cpu_offline &&
                     (!(chip->flags & IRQCHIP_ONOFFLINE_ENABLED) ||
-                     !(desc->istate & IRQS_DISABLED)))
+                     !irqd_irq_disabled(&desc->irq_data)))
                         chip->irq_cpu_offline(&desc->irq_data);
 
                 raw_spin_unlock_irqrestore(&desc->lock, flags);
diff --git a/kernel/irq/debug.h b/kernel/irq/debug.h
index d1a33b7fa61..a0bd875ba3d 100644
--- a/kernel/irq/debug.h
+++ b/kernel/irq/debug.h
@@ -6,6 +6,8 @@
 
 #define P(f) if (desc->status & f) printk("%14s set\n", #f)
 #define PS(f) if (desc->istate & f) printk("%14s set\n", #f)
+/* FIXME */
+#define PD(f) do { } while (0)
 
 static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
 {
@@ -28,13 +30,15 @@ static inline void print_irq_desc(unsigned int irq, struct irq_desc *desc)
         P(IRQ_NOAUTOEN);
 
         PS(IRQS_AUTODETECT);
-        PS(IRQS_INPROGRESS);
         PS(IRQS_REPLAY);
         PS(IRQS_WAITING);
-        PS(IRQS_DISABLED);
         PS(IRQS_PENDING);
-        PS(IRQS_MASKED);
+
+        PD(IRQS_INPROGRESS);
+        PD(IRQS_DISABLED);
+        PD(IRQS_MASKED);
 }
 
 #undef P
 #undef PS
+#undef PD
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index 517561fc731..60fd5cd75c7 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -178,13 +178,13 @@ irqreturn_t handle_irq_event(struct irq_desc *desc)
         irq_compat_clr_pending(desc);
         desc->istate &= ~IRQS_PENDING;
         irq_compat_set_progress(desc);
-        desc->istate |= IRQS_INPROGRESS;
+        irqd_set(&desc->irq_data, IRQD_IRQ_INPROGRESS);
         raw_spin_unlock(&desc->lock);
 
         ret = handle_irq_event_percpu(desc, action);
 
         raw_spin_lock(&desc->lock);
-        desc->istate &= ~IRQS_INPROGRESS;
+        irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
         irq_compat_clr_progress(desc);
         return ret;
 }
diff --git a/kernel/irq/internals.h b/kernel/irq/internals.h
index 6c6ec9a4902..6b8b9713e28 100644
--- a/kernel/irq/internals.h
+++ b/kernel/irq/internals.h
@@ -44,26 +44,20 @@ enum {
  * IRQS_SPURIOUS_DISABLED       - was disabled due to spurious interrupt
  *                                detection
  * IRQS_POLL_INPROGRESS         - polling in progress
- * IRQS_INPROGRESS              - Interrupt in progress
  * IRQS_ONESHOT                 - irq is not unmasked in primary handler
  * IRQS_REPLAY                  - irq is replayed
  * IRQS_WAITING                 - irq is waiting
- * IRQS_DISABLED                - irq is disabled
  * IRQS_PENDING                 - irq is pending and replayed later
- * IRQS_MASKED                  - irq is masked
  * IRQS_SUSPENDED               - irq is suspended
  */
 enum {
         IRQS_AUTODETECT         = 0x00000001,
         IRQS_SPURIOUS_DISABLED  = 0x00000002,
         IRQS_POLL_INPROGRESS    = 0x00000008,
-        IRQS_INPROGRESS         = 0x00000010,
         IRQS_ONESHOT            = 0x00000020,
         IRQS_REPLAY             = 0x00000040,
         IRQS_WAITING            = 0x00000080,
-        IRQS_DISABLED           = 0x00000100,
         IRQS_PENDING            = 0x00000200,
-        IRQS_MASKED             = 0x00000400,
         IRQS_SUSPENDED          = 0x00000800,
 };
 
diff --git a/kernel/irq/irqdesc.c b/kernel/irq/irqdesc.c
index 96c3268a509..2c039c9b938 100644
--- a/kernel/irq/irqdesc.c
+++ b/kernel/irq/irqdesc.c
@@ -81,7 +81,6 @@ static void desc_set_defaults(unsigned int irq, struct irq_desc *desc, int node)
         desc->irq_data.msi_desc = NULL;
         irq_settings_clr_and_set(desc, ~0, _IRQ_DEFAULT_INIT_FLAGS);
         irqd_set(&desc->irq_data, IRQD_IRQ_DISABLED);
-        desc->istate = IRQS_DISABLED;
         desc->handle_irq = handle_bad_irq;
         desc->depth = 1;
         desc->irq_count = 0;
@@ -239,7 +238,6 @@ int __init early_irq_init(void)
 
 struct irq_desc irq_desc[NR_IRQS] __cacheline_aligned_in_smp = {
         [0 ... NR_IRQS-1] = {
-                .istate         = IRQS_DISABLED,
                 .handle_irq     = handle_bad_irq,
                 .depth          = 1,
                 .lock           = __RAW_SPIN_LOCK_UNLOCKED(irq_desc->lock),
diff --git a/kernel/irq/manage.c b/kernel/irq/manage.c
index 3d151fd762a..6e8acb75599 100644
--- a/kernel/irq/manage.c
+++ b/kernel/irq/manage.c
@@ -41,7 +41,7 @@ early_param("threadirqs", setup_forced_irqthreads);
 void synchronize_irq(unsigned int irq)
 {
         struct irq_desc *desc = irq_to_desc(irq);
-        unsigned int state;
+        bool inprogress;
 
         if (!desc)
                 return;
@@ -53,16 +53,16 @@ void synchronize_irq(unsigned int irq)
                  * Wait until we're out of the critical section.  This might
                  * give the wrong answer due to the lack of memory barriers.
                  */
-                while (desc->istate & IRQS_INPROGRESS)
+                while (irqd_irq_inprogress(&desc->irq_data))
                         cpu_relax();
 
                 /* Ok, that indicated we're done: double-check carefully. */
                 raw_spin_lock_irqsave(&desc->lock, flags);
-                state = desc->istate;
+                inprogress = irqd_irq_inprogress(&desc->irq_data);
                 raw_spin_unlock_irqrestore(&desc->lock, flags);
 
                 /* Oops, that failed? */
-        } while (state & IRQS_INPROGRESS);
+        } while (inprogress);
 
         /*
          * We made sure that no hardirq handler is running. Now verify
@@ -563,9 +563,9 @@ int __irq_set_trigger(struct irq_desc *desc, unsigned int irq,
         flags &= IRQ_TYPE_SENSE_MASK;
 
         if (chip->flags & IRQCHIP_SET_TYPE_MASKED) {
-                if (!(desc->istate & IRQS_MASKED))
+                if (!irqd_irq_masked(&desc->irq_data))
                         mask_irq(desc);
-                if (!(desc->istate & IRQS_DISABLED))
+                if (!irqd_irq_disabled(&desc->irq_data))
                         unmask = 1;
         }
 
@@ -663,7 +663,7 @@ again:
          * irq_wake_thread(). See the comment there which explains the
          * serialization.
          */
-        if (unlikely(desc->istate & IRQS_INPROGRESS)) {
+        if (unlikely(irqd_irq_inprogress(&desc->irq_data))) {
                 raw_spin_unlock_irq(&desc->lock);
                 chip_bus_sync_unlock(desc);
                 cpu_relax();
@@ -680,12 +680,10 @@ again:
 
         desc->threads_oneshot &= ~action->thread_mask;
 
-        if (!desc->threads_oneshot && !(desc->istate & IRQS_DISABLED) &&
-            (desc->istate & IRQS_MASKED)) {
-                irq_compat_clr_masked(desc);
-                desc->istate &= ~IRQS_MASKED;
-                desc->irq_data.chip->irq_unmask(&desc->irq_data);
-        }
+        if (!desc->threads_oneshot && !irqd_irq_disabled(&desc->irq_data) &&
+            irqd_irq_masked(&desc->irq_data))
+                unmask_irq(desc);
+
 out_unlock:
         raw_spin_unlock_irq(&desc->lock);
         chip_bus_sync_unlock(desc);
@@ -779,7 +777,7 @@ static int irq_thread(void *data)
                 atomic_inc(&desc->threads_active);
 
                 raw_spin_lock_irq(&desc->lock);
-                if (unlikely(desc->istate & IRQS_DISABLED)) {
+                if (unlikely(irqd_irq_disabled(&desc->irq_data))) {
                         /*
                          * CHECKME: We might need a dedicated
                          * IRQ_THREAD_PENDING flag here, which
@@ -997,8 +995,8 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
                 }
 
                 desc->istate &= ~(IRQS_AUTODETECT | IRQS_SPURIOUS_DISABLED | \
-                                  IRQS_INPROGRESS | IRQS_ONESHOT | \
-                                  IRQS_WAITING);
+                                  IRQS_ONESHOT | IRQS_WAITING);
+                irqd_clear(&desc->irq_data, IRQD_IRQ_INPROGRESS);
 
                 if (new->flags & IRQF_PERCPU) {
                         irqd_set(&desc->irq_data, IRQD_PER_CPU);
diff --git a/kernel/irq/migration.c b/kernel/irq/migration.c
index ec4806d4778..5e81d34b08d 100644
--- a/kernel/irq/migration.c
+++ b/kernel/irq/migration.c
@@ -66,7 +66,7 @@ void irq_move_irq(struct irq_data *idata)
         if (likely(!irqd_is_setaffinity_pending(idata)))
                 return;
 
-        if (unlikely(desc->istate & IRQS_DISABLED))
+        if (unlikely(irqd_irq_disabled(idata)))
                 return;
 
         /*
@@ -74,7 +74,7 @@ void irq_move_irq(struct irq_data *idata)
          * threaded interrupt with ONESHOT set, we can end up with an
          * interrupt storm.
          */
-        masked = desc->istate & IRQS_MASKED;
+        masked = irqd_irq_masked(idata);
         if (!masked)
                 idata->chip->irq_mask(idata);
         irq_move_masked_irq(idata);
diff --git a/kernel/irq/spurious.c b/kernel/irq/spurious.c
index dd586ebf9c8..cd424cdf17f 100644
--- a/kernel/irq/spurious.c
+++ b/kernel/irq/spurious.c
@@ -45,12 +45,12 @@ bool irq_wait_for_poll(struct irq_desc *desc)
 #ifdef CONFIG_SMP
         do {
                 raw_spin_unlock(&desc->lock);
-                while (desc->istate & IRQS_INPROGRESS)
+                while (irqd_irq_inprogress(&desc->irq_data))
                         cpu_relax();
                 raw_spin_lock(&desc->lock);
-        } while (desc->istate & IRQS_INPROGRESS);
+        } while irqd_irq_inprogress(&desc->irq_data);
         /* Might have been disabled in meantime */
-        return !(desc->istate & IRQS_DISABLED) && desc->action;
+        return !irqd_irq_disabled(&desc->irq_data) && desc->action;
 #else
         return false;
 #endif
@@ -75,7 +75,7 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force)
          * Do not poll disabled interrupts unless the spurious
          * disabled poller asks explicitely.
          */
-        if ((desc->istate & IRQS_DISABLED) && !force)
+        if (irqd_irq_disabled(&desc->irq_data) && !force)
                 goto out;
 
         /*
@@ -88,7 +88,7 @@ static int try_one_irq(int irq, struct irq_desc *desc, bool force)
                 goto out;
 
         /* Already running on another processor */
-        if (desc->istate & IRQS_INPROGRESS) {
+        if (irqd_irq_inprogress(&desc->irq_data)) {
                 /*
                  * Already running: If it is shared get the other
                  * CPU to go looking for our mystery interrupt too