xiaomi-sm8450/android_kernel_xiaomi_sm8450
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

s390/irq: rework irq subclass handling

Browse Source 
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>
This commit is contained in:
Heiko Carstens
2013-09-04 13:35:45 +02:00
parent 50ce749d0d
commit 82003c3e60
9 changed files with 38 additions and 57 deletions
Download Patch File Download Diff File Expand all files Collapse all files

55
arch/s390/kernel/irq.c
View File

@@ -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);