genirq: Provide compat handling for chip->mask()

Wrap the old chip function mask() until the migration is complete and
the old chip functions are removed.

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Cc: Peter Zijlstra <peterz@infradead.org>
LKML-Reference: <20100927121841.940355859@linutronix.de>
Reviewed-by: H. Peter Anvin <hpa@zytor.com>
Reviewed-by: Ingo Molnar <mingo@elte.hu>

kernel/irq/chip.c

@@ -320,11 +320,16 @@ static void default_shutdown(unsigned int irq)
 {
 	struct irq_desc *desc = irq_to_desc(irq);
 
-	desc->irq_data.chip->mask(irq);
+	desc->irq_data.chip->irq_mask(&desc->irq_data);
 	desc->status |= IRQ_MASKED;
 }
 
 /* Temporary migration helpers */
+static void compat_irq_mask(struct irq_data *data)
+{
+	data->chip->mask(data->irq);
+}
+
 static void compat_bus_lock(struct irq_data *data)
 {
 	data->chip->bus_lock(data->irq);
@@ -362,6 +367,9 @@ void irq_chip_set_defaults(struct irq_chip *chip)
 		chip->irq_bus_lock = compat_bus_lock;
 	if (chip->bus_sync_unlock)
 		chip->irq_bus_sync_unlock = compat_bus_sync_unlock;
+
+	if (chip->mask)
+		chip->irq_mask = compat_irq_mask;
 }
 
 static inline void mask_ack_irq(struct irq_desc *desc, int irq)
@@ -369,17 +377,17 @@ static inline void mask_ack_irq(struct irq_desc *desc, int irq)
 	if (desc->irq_data.chip->mask_ack)
 		desc->irq_data.chip->mask_ack(irq);
 	else {
-		desc->irq_data.chip->mask(irq);
+		desc->irq_data.chip->irq_mask(&desc->irq_data);
 		if (desc->irq_data.chip->ack)
 			desc->irq_data.chip->ack(irq);
 	}
 	desc->status |= IRQ_MASKED;
 }
 
-static inline void mask_irq(struct irq_desc *desc, int irq)
+static inline void mask_irq(struct irq_desc *desc)
 {
-	if (desc->irq_data.chip->mask) {
-		desc->irq_data.chip->mask(irq);
+	if (desc->irq_data.chip->irq_mask) {
+		desc->irq_data.chip->irq_mask(&desc->irq_data);
 		desc->status |= IRQ_MASKED;
 	}
 }
@@ -553,7 +561,7 @@ handle_fasteoi_irq(unsigned int irq, struct irq_desc *desc)
 	action = desc->action;
 	if (unlikely(!action || (desc->status & IRQ_DISABLED))) {
 		desc->status |= IRQ_PENDING;
-		mask_irq(desc, irq);
+		mask_irq(desc);
 		goto out;
 	}
 
@@ -621,7 +629,7 @@ handle_edge_irq(unsigned int irq, struct irq_desc *desc)
 		irqreturn_t action_ret;
 
 		if (unlikely(!action)) {
-			mask_irq(desc, irq);
+			mask_irq(desc);
 			goto out_unlock;
 		}
 

kernel/irq/handle.c

@@ -360,7 +360,6 @@ struct irq_chip dummy_irq_chip = {
 	.enable		= compat_noop,
 	.disable	= compat_noop,
 	.ack		= compat_noop,
-	.mask		= compat_noop,
 	.unmask		= compat_noop,
 	.end		= compat_noop,
 };

kernel/irq/migration.c

@@ -61,7 +61,7 @@ void move_native_irq(int irq)
 	if (unlikely(desc->status & IRQ_DISABLED))
 		return;
 
-	desc->irq_data.chip->mask(irq);
+	desc->irq_data.chip->irq_mask(&desc->irq_data);
 	move_masked_irq(irq);
 	desc->irq_data.chip->unmask(irq);
 }