s390/irq: rework irq subclass handling

Let's not add a function for every external interrupt subclass for
which we need reference counting. Just have two register/unregister
functions which have a subclass parameter:

void irq_subclass_register(enum irq_subclass subclass);
void irq_subclass_unregister(enum irq_subclass subclass);

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>

1 files changed, 8 insertions, 4 deletions

diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index 1eaa3625803c..5f8bcc5fe423 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -78,10 +78,14 @@ typedef void (*ext_int_handler_t)(struct ext_code, unsigned int, unsigned long);
 
 int register_external_interrupt(u16 code, ext_int_handler_t handler);
 int unregister_external_interrupt(u16 code, ext_int_handler_t handler);
-void service_subclass_irq_register(void);
-void service_subclass_irq_unregister(void);
-void measurement_alert_subclass_register(void);
-void measurement_alert_subclass_unregister(void);
+
+enum irq_subclass {
+	IRQ_SUBCLASS_MEASUREMENT_ALERT = 5,
+	IRQ_SUBCLASS_SERVICE_SIGNAL = 9,
+};
+
+void irq_subclass_register(enum irq_subclass subclass);
+void irq_subclass_unregister(enum irq_subclass subclass);
 
 #define irq_canonicalize(irq)  (irq)