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authorHeiko Carstens <heiko.carstens@de.ibm.com>2013-09-04 13:35:45 +0200
committerHeiko Carstens <heiko.carstens@de.ibm.com>2013-09-04 17:19:13 +0200
commit82003c3e606905ca20c78a0ceca9f412e6f71474 (patch)
tree846dc04eec40aaa7e25915cb8131ed52da97e334 /arch/s390/kernel/irq.c
parent50ce749d0d107aaed8c2d702b987529f978a40f7 (diff)
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>
Diffstat (limited to 'arch/s390/kernel/irq.c')
-rw-r--r--arch/s390/kernel/irq.c55
1 files changed, 16 insertions, 39 deletions
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 4ecf017f697..6834277124c 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -290,48 +290,25 @@ void __init init_ext_interrupts(void)
setup_irq(EXT_INTERRUPT, &external_interrupt);
}
-static DEFINE_SPINLOCK(sc_irq_lock);
-static int sc_irq_refcount;
+static DEFINE_SPINLOCK(irq_subclass_lock);
+static unsigned char irq_subclass_refcount[64];
-void service_subclass_irq_register(void)
+void irq_subclass_register(enum irq_subclass subclass)
{
- spin_lock(&sc_irq_lock);
- if (!sc_irq_refcount)
- ctl_set_bit(0, 9);
- sc_irq_refcount++;
- spin_unlock(&sc_irq_lock);
+ spin_lock(&irq_subclass_lock);
+ if (!irq_subclass_refcount[subclass])
+ ctl_set_bit(0, subclass);
+ irq_subclass_refcount[subclass]++;
+ spin_unlock(&irq_subclass_lock);
}
-EXPORT_SYMBOL(service_subclass_irq_register);
+EXPORT_SYMBOL(irq_subclass_register);
-void service_subclass_irq_unregister(void)
+void irq_subclass_unregister(enum irq_subclass subclass)
{
- spin_lock(&sc_irq_lock);
- sc_irq_refcount--;
- if (!sc_irq_refcount)
- ctl_clear_bit(0, 9);
- spin_unlock(&sc_irq_lock);
+ spin_lock(&irq_subclass_lock);
+ irq_subclass_refcount[subclass]--;
+ if (!irq_subclass_refcount[subclass])
+ ctl_clear_bit(0, subclass);
+ spin_unlock(&irq_subclass_lock);
}
-EXPORT_SYMBOL(service_subclass_irq_unregister);
-
-static DEFINE_SPINLOCK(ma_subclass_lock);
-static int ma_subclass_refcount;
-
-void measurement_alert_subclass_register(void)
-{
- spin_lock(&ma_subclass_lock);
- if (!ma_subclass_refcount)
- ctl_set_bit(0, 5);
- ma_subclass_refcount++;
- spin_unlock(&ma_subclass_lock);
-}
-EXPORT_SYMBOL(measurement_alert_subclass_register);
-
-void measurement_alert_subclass_unregister(void)
-{
- spin_lock(&ma_subclass_lock);
- ma_subclass_refcount--;
- if (!ma_subclass_refcount)
- ctl_clear_bit(0, 5);
- spin_unlock(&ma_subclass_lock);
-}
-EXPORT_SYMBOL(measurement_alert_subclass_unregister);
+EXPORT_SYMBOL(irq_subclass_unregister);