diff options
| -rw-r--r-- | arch/s390/include/asm/s390_ext.h | 2 | ||||
| -rw-r--r-- | arch/s390/kernel/s390_ext.c | 23 | ||||
| -rw-r--r-- | arch/s390/mm/fault.c | 2 | ||||
| -rw-r--r-- | drivers/s390/block/dasd_diag.c | 4 | ||||
| -rw-r--r-- | drivers/s390/char/sclp.c | 6 | ||||
| -rw-r--r-- | drivers/s390/kvm/kvm_virtio.c | 2 |
6 files changed, 32 insertions, 7 deletions
diff --git a/arch/s390/include/asm/s390_ext.h b/arch/s390/include/asm/s390_ext.h index 080876d..85b2154 100644 --- a/arch/s390/include/asm/s390_ext.h +++ b/arch/s390/include/asm/s390_ext.h @@ -13,5 +13,7 @@ typedef void (*ext_int_handler_t)(unsigned int, 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); #endif /* _S390_EXTINT_H */ diff --git a/arch/s390/kernel/s390_ext.c b/arch/s390/kernel/s390_ext.c index 1850299..87b5c53 100644 --- a/arch/s390/kernel/s390_ext.c +++ b/arch/s390/kernel/s390_ext.c @@ -106,3 +106,26 @@ void __irq_entry do_extint(struct pt_regs *regs, unsigned int ext_int_code, irq_exit(); set_irq_regs(old_regs); } + +static DEFINE_SPINLOCK(sc_irq_lock); +static int sc_irq_refcount; + +void service_subclass_irq_register(void) +{ + spin_lock(&sc_irq_lock); + if (!sc_irq_refcount) + ctl_set_bit(0, 9); + sc_irq_refcount++; + spin_unlock(&sc_irq_lock); +} +EXPORT_SYMBOL(service_subclass_irq_register); + +void service_subclass_irq_unregister(void) +{ + spin_lock(&sc_irq_lock); + sc_irq_refcount--; + if (!sc_irq_refcount) + ctl_clear_bit(0, 9); + spin_unlock(&sc_irq_lock); +} +EXPORT_SYMBOL(service_subclass_irq_unregister); diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c index e46ba29..6e922b5 100644 --- a/arch/s390/mm/fault.c +++ b/arch/s390/mm/fault.c @@ -613,7 +613,7 @@ static int __init pfault_irq_init(void) rc = pfault_init() == 0 ? 0 : -EOPNOTSUPP; if (rc) goto out_pfault; - ctl_set_bit(0, 9); + service_subclass_irq_register(); hotcpu_notifier(pfault_cpu_notify, 0); return 0; diff --git a/drivers/s390/block/dasd_diag.c b/drivers/s390/block/dasd_diag.c index 85dddb1..5e8e82d 100644 --- a/drivers/s390/block/dasd_diag.c +++ b/drivers/s390/block/dasd_diag.c @@ -642,7 +642,7 @@ dasd_diag_init(void) } ASCEBC(dasd_diag_discipline.ebcname, 4); - ctl_set_bit(0, 9); + service_subclass_irq_register(); register_external_interrupt(0x2603, dasd_ext_handler); dasd_diag_discipline_pointer = &dasd_diag_discipline; return 0; @@ -652,7 +652,7 @@ static void __exit dasd_diag_cleanup(void) { unregister_external_interrupt(0x2603, dasd_ext_handler); - ctl_clear_bit(0, 9); + service_subclass_irq_unregister(); dasd_diag_discipline_pointer = NULL; } diff --git a/drivers/s390/char/sclp.c b/drivers/s390/char/sclp.c index b76c61f..b37b98c 100644 --- a/drivers/s390/char/sclp.c +++ b/drivers/s390/char/sclp.c @@ -885,12 +885,12 @@ sclp_check_interface(void) spin_unlock_irqrestore(&sclp_lock, flags); /* Enable service-signal interruption - needs to happen * with IRQs enabled. */ - ctl_set_bit(0, 9); + service_subclass_irq_register(); /* Wait for signal from interrupt or timeout */ sclp_sync_wait(); /* Disable service-signal interruption - needs to happen * with IRQs enabled. */ - ctl_clear_bit(0,9); + service_subclass_irq_unregister(); spin_lock_irqsave(&sclp_lock, flags); del_timer(&sclp_request_timer); if (sclp_init_req.status == SCLP_REQ_DONE && @@ -1070,7 +1070,7 @@ sclp_init(void) spin_unlock_irqrestore(&sclp_lock, flags); /* Enable service-signal external interruption - needs to happen with * IRQs enabled. */ - ctl_set_bit(0, 9); + service_subclass_irq_register(); sclp_init_mask(1); return 0; diff --git a/drivers/s390/kvm/kvm_virtio.c b/drivers/s390/kvm/kvm_virtio.c index 607998f..724b592 100644 --- a/drivers/s390/kvm/kvm_virtio.c +++ b/drivers/s390/kvm/kvm_virtio.c @@ -441,7 +441,7 @@ static int __init kvm_devices_init(void) INIT_WORK(&hotplug_work, hotplug_devices); - ctl_set_bit(0, 9); + service_subclass_irq_register(); register_external_interrupt(0x2603, kvm_extint_handler); scan_devices(); |