irq/core changes for v3.11

index 249fe63..6816192 100644
@@ -426,7 +426,7 @@ static void gpio_irq_handler(unsigned irq, struct irq_desc *desc)
 		if (!(cause & (1 << i)))
 			continue;
 
-		type = irqd_get_trigger_type(irq_get_irq_data(irq));
+		type = irq_get_trigger_type(irq);
 		if ((type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
 			/* Swap polarity (race with GPIO line) */
 			u32 polarity;

index a22f06a..7181def 100644
@@ -607,7 +607,7 @@ static void octeon_irq_ciu_gpio_ack(struct irq_data *data)
 
 static void octeon_irq_handle_gpio(unsigned int irq, struct irq_desc *desc)
 {
-	if (irqd_get_trigger_type(irq_desc_get_irq_data(desc)) & IRQ_TYPE_EDGE_BOTH)
+	if (irq_get_trigger_type(irq) & IRQ_TYPE_EDGE_BOTH)
 		handle_edge_irq(irq, desc);
 	else
 		handle_level_irq(irq, desc);

index 3a4816a..80ad35e 100644
@@ -457,7 +457,7 @@ static void mvebu_gpio_irq_handler(unsigned int irq, struct irq_desc *desc)
 		if (!(cause & (1 << i)))
 			continue;
 
-		type = irqd_get_trigger_type(irq_get_irq_data(irq));
+		type = irq_get_trigger_type(irq);
 		if ((type & IRQ_TYPE_SENSE_MASK) == IRQ_TYPE_EDGE_BOTH) {
 			/* Swap polarity (race with GPIO line) */
 			u32 polarity;

index a9d2b2f..4c68265 100644
@@ -204,10 +204,10 @@ static unsigned int combiner_lookup_irq(int group)
 	return 0;
 }
 
-void __init combiner_init(void __iomem *combiner_base,
-			  struct device_node *np,
-			  unsigned int max_nr,
-			  int irq_base)
+static void __init combiner_init(void __iomem *combiner_base,
+				 struct device_node *np,
+				 unsigned int max_nr,
+				 int irq_base)
 {
 	int i, irq;
 	unsigned int nr_irq;

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index bbccd51..5d5e6f9 100644
@@ -1208,8 +1208,7 @@ int stmpe_probe(struct stmpe_client_info *ci, int partnum)
 		}
 		stmpe->variant = stmpe_noirq_variant_info[stmpe->partnum];
 	} else if (pdata->irq_trigger == IRQF_TRIGGER_NONE) {
-		pdata->irq_trigger =
-			irqd_get_trigger_type(irq_get_irq_data(stmpe->irq));
+		pdata->irq_trigger = irq_get_trigger_type(stmpe->irq);
 	}
 
 	ret = stmpe_chip_init(stmpe);

index a5f9888..9d2d1ba 100644
@@ -537,16 +537,13 @@ static void twl4030_sih_bus_sync_unlock(struct irq_data *data)
 		/* Modify only the bits we know must change */
 		while (edge_change) {
 			int		i = fls(edge_change) - 1;
-			struct irq_data	*idata;
 			int		byte = i >> 2;
 			int		off = (i & 0x3) * 2;
 			unsigned int	type;
 
-			idata = irq_get_irq_data(i + agent->irq_base);
-
 			bytes[byte] &= ~(0x03 << off);
 
-			type = irqd_get_trigger_type(idata);
+			type = irq_get_trigger_type(i + agent->irq_base);
 			if (type & IRQ_TYPE_EDGE_RISING)
 				bytes[byte] |= BIT(off + 1);
 			if (type & IRQ_TYPE_EDGE_FALLING)

129 lines not on this page · raw message

index 0d5b17b..ba2c708 100644
@@ -66,6 +66,10 @@ struct irq_domain_ops {
 		     unsigned long *out_hwirq, unsigned int *out_type);
 };
 
+extern struct irq_domain_ops irq_generic_chip_ops;
+
+struct irq_domain_chip_generic;
+
 /**
  * struct irq_domain - Hardware interrupt number translation object
  * @link: Element in global irq_domain list.

@@ -109,8 +113,16 @@ struct irq_domain {
 
 	/* Optional device node pointer */
 	struct device_node *of_node;
+	/* Optional pointer to generic interrupt chips */
+	struct irq_domain_chip_generic *gc;
 };
 
+#define IRQ_DOMAIN_MAP_LEGACY 0 /* driver allocated fixed range of irqs.
+				 * ie. legacy 8259, gets irqs 1..15 */
+#define IRQ_DOMAIN_MAP_NOMAP 1 /* no fast reverse mapping */
+#define IRQ_DOMAIN_MAP_LINEAR 2 /* linear map of interrupts */
+#define IRQ_DOMAIN_MAP_TREE 3 /* radix tree */
+
 #ifdef CONFIG_IRQ_DOMAIN
 struct irq_domain *irq_domain_add_simple(struct device_node *of_node,
 					 unsigned int size,

index cbd97ce..a3bb14f 100644
@@ -213,6 +213,19 @@ void irq_enable(struct irq_desc *desc)
 	irq_state_clr_masked(desc);
 }
 
+/**
+ * irq_disable - Mark interupt disabled
+ * @desc:	irq descriptor which should be disabled
+ *
+ * If the chip does not implement the irq_disable callback, we
+ * use a lazy disable approach. That means we mark the interrupt
+ * disabled, but leave the hardware unmasked. That's an
+ * optimization because we avoid the hardware access for the
+ * common case where no interrupt happens after we marked it
+ * disabled. If an interrupt happens, then the interrupt flow
+ * handler masks the line at the hardware level and marks it
+ * pending.
+ */
 void irq_disable(struct irq_desc *desc)
 {
 	irq_state_set_disabled(desc);

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index 5a83dde..489921e 100644
@@ -16,12 +16,6 @@
 #include <linux/smp.h>
 #include <linux/fs.h>
 
-#define IRQ_DOMAIN_MAP_LEGACY 0 /* driver allocated fixed range of irqs.
-				 * ie. legacy 8259, gets irqs 1..15 */
-#define IRQ_DOMAIN_MAP_NOMAP 1 /* no fast reverse mapping */
-#define IRQ_DOMAIN_MAP_LINEAR 2 /* linear map of interrupts */
-#define IRQ_DOMAIN_MAP_TREE 3 /* radix tree */
-
 static LIST_HEAD(irq_domain_list);
 static DEFINE_MUTEX(irq_domain_mutex);
 

@@ -693,7 +687,7 @@ unsigned int irq_create_of_mapping(struct device_node *controller,
 
 	/* Set type if specified and different than the current one */
 	if (type != IRQ_TYPE_NONE &&
-	    type != (irqd_get_trigger_type(irq_get_irq_data(virq))))
+	    type != irq_get_trigger_type(virq))
 		irq_set_irq_type(virq, type);
 	return virq;
 }

index fa17855..514bcfd 100644
@@ -555,9 +555,9 @@ int can_request_irq(unsigned int irq, unsigned long irqflags)
 		return 0;
 
 	if (irq_settings_can_request(desc)) {
-		if (desc->action)
-			if (irqflags & desc->action->flags & IRQF_SHARED)
-				canrequest =1;
+		if (!desc->action ||
+		    irqflags & desc->action->flags & IRQF_SHARED)
+			canrequest = 1;
 	}
 	irq_put_desc_unlock(desc, flags);
 	return canrequest;

@@ -840,9 +840,6 @@ static void irq_thread_dtor(struct callback_head *unused)
 static int irq_thread(void *data)
 {
 	struct callback_head on_exit_work;
-	static const struct sched_param param = {
-		.sched_priority = MAX_USER_RT_PRIO/2,
-	};
 	struct irqaction *action = data;
 	struct irq_desc *desc = irq_to_desc(action->irq);
 	irqreturn_t (*handler_fn)(struct irq_desc *desc,

@@ -854,8 +851,6 @@ static int irq_thread(void *data)
 	else
 		handler_fn = irq_thread_fn;
 
-	sched_setscheduler(current, SCHED_FIFO, &param);
-
 	init_task_work(&on_exit_work, irq_thread_dtor);
 	task_work_add(current, &on_exit_work, false);
 

@@ -950,6 +945,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 	 */
 	if (new->thread_fn && !nested) {
 		struct task_struct *t;
+		static const struct sched_param param = {
+			.sched_priority = MAX_USER_RT_PRIO/2,
+		};
 
 		t = kthread_create(irq_thread, new, "irq/%d-%s", irq,
 				   new->name);

@@ -957,6 +955,9 @@ __setup_irq(unsigned int irq, struct irq_desc *desc, struct irqaction *new)
 			ret = PTR_ERR(t);
 			goto out_mput;
 		}
+
+		sched_setscheduler(t, SCHED_FIFO, &param);
+
 		/*
 		 * We keep the reference to the task struct even if
 		 * the thread dies to avoid that the interrupt code

index b5197dc..a5f8836 100644
@@ -127,8 +127,7 @@ static inline void __local_bh_disable(unsigned long ip, unsigned int cnt)
 
 void local_bh_disable(void)
 {
-	__local_bh_disable((unsigned long)__builtin_return_address(0),
-				SOFTIRQ_DISABLE_OFFSET);
+	__local_bh_disable(_RET_IP_, SOFTIRQ_DISABLE_OFFSET);
 }
 
 EXPORT_SYMBOL(local_bh_disable);

@@ -139,7 +138,7 @@ static void __local_bh_enable(unsigned int cnt)
 	WARN_ON_ONCE(!irqs_disabled());
 
 	if (softirq_count() == cnt)
-		trace_softirqs_on((unsigned long)__builtin_return_address(0));
+		trace_softirqs_on(_RET_IP_);
 	sub_preempt_count(cnt);
 }
 

@@ -184,7 +183,7 @@ static inline void _local_bh_enable_ip(unsigned long ip)
 
 void local_bh_enable(void)
 {
-	_local_bh_enable_ip((unsigned long)__builtin_return_address(0));
+	_local_bh_enable_ip(_RET_IP_);
 }
 EXPORT_SYMBOL(local_bh_enable);
 

@@ -223,8 +222,7 @@ asmlinkage void __do_softirq(void)
 	pending = local_softirq_pending();
 	account_irq_enter_time(current);
 
-	__local_bh_disable((unsigned long)__builtin_return_address(0),
-				SOFTIRQ_OFFSET);
+	__local_bh_disable(_RET_IP_, SOFTIRQ_OFFSET);
 	lockdep_softirq_enter();
 
 	cpu = smp_processor_id();