s390/irq: Use defines for external interruption codes

Use the new defines for external interruption codes to get rid
of "magic" numbers in the s390 source code. And while we're at it,
also rename the (un-)register_external_interrupt function to
something shorter so that this patch does not exceed the 80
columns all over the place.

Signed-off-by: Thomas Huth <thuth@linux.vnet.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

arch/s390/include/asm/irq.h

@@ -27,6 +27,7 @@
 #define EXT_IRQ_TIMING_ALERT	0x1406
 #define EXT_IRQ_MEASURE_ALERT	0x1407
 #define EXT_IRQ_SERVICE_SIG	0x2401
+#define EXT_IRQ_CP_SERVICE	0x2603
 #define EXT_IRQ_IUCV		0x4000
 
 #ifndef __ASSEMBLY__
@@ -89,8 +90,8 @@ struct ext_code {
 
 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);
+int register_external_irq(u16 code, ext_int_handler_t handler);
+int unregister_external_irq(u16 code, ext_int_handler_t handler);
 
 enum irq_subclass {
 	IRQ_SUBCLASS_MEASUREMENT_ALERT = 5,

arch/s390/kernel/irq.c

@@ -205,7 +205,7 @@ static inline int ext_hash(u16 code)
 	return (code + (code >> 9)) & (ARRAY_SIZE(ext_int_hash) - 1);
 }
 
-int register_external_interrupt(u16 code, ext_int_handler_t handler)
+int register_external_irq(u16 code, ext_int_handler_t handler)
 {
 	struct ext_int_info *p;
 	unsigned long flags;
@@ -223,9 +223,9 @@ int register_external_interrupt(u16 code, ext_int_handler_t handler)
 	spin_unlock_irqrestore(&ext_int_hash_lock, flags);
 	return 0;
 }
-EXPORT_SYMBOL(register_external_interrupt);
+EXPORT_SYMBOL(register_external_irq);
 
-int unregister_external_interrupt(u16 code, ext_int_handler_t handler)
+int unregister_external_irq(u16 code, ext_int_handler_t handler)
 {
 	struct ext_int_info *p;
 	unsigned long flags;
@@ -241,7 +241,7 @@ int unregister_external_interrupt(u16 code, ext_int_handler_t handler)
 	spin_unlock_irqrestore(&ext_int_hash_lock, flags);
 	return 0;
 }
-EXPORT_SYMBOL(unregister_external_interrupt);
+EXPORT_SYMBOL(unregister_external_irq);
 
 static irqreturn_t do_ext_interrupt(int irq, void *dummy)
 {
@@ -251,7 +251,7 @@ static irqreturn_t do_ext_interrupt(int irq, void *dummy)
 	int index;
 
 	ext_code = *(struct ext_code *) &regs->int_code;
-	if (ext_code.code != 0x1004)
+	if (ext_code.code != EXT_IRQ_CLK_COMP)
 		__get_cpu_var(s390_idle).nohz_delay = 1;
 
 	index = ext_hash(ext_code.code);

arch/s390/kernel/perf_cpum_cf.c

@@ -673,7 +673,8 @@ static int __init cpumf_pmu_init(void)
 	ctl_clear_bit(0, 48);
 
 	/* register handler for measurement-alert interruptions */
-	rc = register_external_interrupt(0x1407, cpumf_measurement_alert);
+	rc = register_external_irq(EXT_IRQ_MEASURE_ALERT,
+				   cpumf_measurement_alert);
 	if (rc) {
 		pr_err("Registering for CPU-measurement alerts "
 		       "failed with rc=%i\n", rc);
@@ -684,7 +685,8 @@ static int __init cpumf_pmu_init(void)
 	rc = perf_pmu_register(&cpumf_pmu, "cpum_cf", PERF_TYPE_RAW);
 	if (rc) {
 		pr_err("Registering the cpum_cf PMU failed with rc=%i\n", rc);
-		unregister_external_interrupt(0x1407, cpumf_measurement_alert);
+		unregister_external_irq(EXT_IRQ_MEASURE_ALERT,
+					cpumf_measurement_alert);
 		goto out;
 	}
 	perf_cpu_notifier(cpumf_pmu_notifier);

arch/s390/kernel/perf_cpum_sf.c

@@ -1621,7 +1621,8 @@ static int __init init_cpum_sampling_pmu(void)
 		pr_err("Registering for s390dbf failed\n");
 	debug_register_view(sfdbg, &debug_sprintf_view);
 
-	err = register_external_interrupt(0x1407, cpumf_measurement_alert);
+	err = register_external_irq(EXT_IRQ_MEASURE_ALERT,
+				    cpumf_measurement_alert);
 	if (err) {
 		pr_cpumsf_err(RS_INIT_FAILURE_ALRT);
 		goto out;
@@ -1630,7 +1631,8 @@ static int __init init_cpum_sampling_pmu(void)
 	err = perf_pmu_register(&cpumf_sampling, "cpum_sf", PERF_TYPE_RAW);
 	if (err) {
 		pr_cpumsf_err(RS_INIT_FAILURE_PERF);
-		unregister_external_interrupt(0x1407, cpumf_measurement_alert);
+		unregister_external_irq(EXT_IRQ_MEASURE_ALERT,
+					cpumf_measurement_alert);
 		goto out;
 	}
 	perf_cpu_notifier(cpumf_pmu_notifier);

arch/s390/kernel/runtime_instr.c

@@ -138,7 +138,8 @@ static int __init runtime_instr_init(void)
 		return 0;
 
 	irq_subclass_register(IRQ_SUBCLASS_MEASUREMENT_ALERT);
-	rc = register_external_interrupt(0x1407, runtime_instr_int_handler);
+	rc = register_external_irq(EXT_IRQ_MEASURE_ALERT,
+				   runtime_instr_int_handler);
 	if (rc)
 		irq_subclass_unregister(IRQ_SUBCLASS_MEASUREMENT_ALERT);
 	else

arch/s390/kernel/sclp.S

@@ -9,6 +9,7 @@
  */
 
 #include <linux/linkage.h>
+#include <asm/irq.h>
 
 LC_EXT_NEW_PSW		= 0x58			# addr of ext int handler
 LC_EXT_NEW_PSW_64	= 0x1b0			# addr of ext int handler 64 bit
@@ -73,9 +74,9 @@ _sclp_wait_int:
 	lpsw	.LwaitpswS1-.LbaseS1(%r13)	# wait until interrupt
 .LwaitS1:
 	lh	%r7,LC_EXT_INT_CODE
-	chi	%r7,0x1004			# timeout?
+	chi	%r7,EXT_IRQ_CLK_COMP		# timeout?
 	je	.LtimeoutS1
-	chi	%r7,0x2401			# service int?
+	chi	%r7,EXT_IRQ_SERVICE_SIG		# service int?
 	jne	.LloopS1
 	sr	%r2,%r2
 	l	%r3,LC_EXT_INT_PARAM

arch/s390/kernel/smp.c

@@ -785,10 +785,10 @@ void __init smp_fill_possible_mask(void)
 void __init smp_prepare_cpus(unsigned int max_cpus)
 {
 	/* request the 0x1201 emergency signal external interrupt */
-	if (register_external_interrupt(0x1201, do_ext_call_interrupt) != 0)
+	if (register_external_irq(EXT_IRQ_EMERGENCY_SIG, do_ext_call_interrupt))
 		panic("Couldn't request external interrupt 0x1201");
 	/* request the 0x1202 external call external interrupt */
-	if (register_external_interrupt(0x1202, do_ext_call_interrupt) != 0)
+	if (register_external_irq(EXT_IRQ_EXTERNAL_CALL, do_ext_call_interrupt))
 		panic("Couldn't request external interrupt 0x1202");
 	smp_detect_cpus();
 }

arch/s390/kernel/time.c

@@ -262,11 +262,11 @@ void __init time_init(void)
 	stp_reset();
 
 	/* request the clock comparator external interrupt */
-	if (register_external_interrupt(0x1004, clock_comparator_interrupt))
-                panic("Couldn't request external interrupt 0x1004");
+	if (register_external_irq(EXT_IRQ_CLK_COMP, clock_comparator_interrupt))
+		panic("Couldn't request external interrupt 0x1004");
 
 	/* request the timing alert external interrupt */
-	if (register_external_interrupt(0x1406, timing_alert_interrupt))
+	if (register_external_irq(EXT_IRQ_TIMING_ALERT, timing_alert_interrupt))
 		panic("Couldn't request external interrupt 0x1406");
 
 	if (clocksource_register(&clocksource_tod) != 0)

arch/s390/mm/fault.c

@@ -627,7 +627,7 @@ static int __init pfault_irq_init(void)
 {
 	int rc;
 
-	rc = register_external_interrupt(0x2603, pfault_interrupt);
+	rc = register_external_irq(EXT_IRQ_CP_SERVICE, pfault_interrupt);
 	if (rc)
 		goto out_extint;
 	rc = pfault_init() == 0 ? 0 : -EOPNOTSUPP;
@@ -638,7 +638,7 @@ static int __init pfault_irq_init(void)
 	return 0;
 
 out_pfault:
-	unregister_external_interrupt(0x2603, pfault_interrupt);
+	unregister_external_irq(EXT_IRQ_CP_SERVICE, pfault_interrupt);
 out_extint:
 	pfault_disable = 1;
 	return rc;

arch/s390/oprofile/hwsampler.c

@@ -1033,7 +1033,7 @@ int hwsampler_setup(void)
 				max_sampler_rate = cb->qsi.max_sampl_rate;
 		}
 	}
-	register_external_interrupt(0x1407, hws_ext_handler);
+	register_external_irq(EXT_IRQ_MEASURE_ALERT, hws_ext_handler);
 
 	hws_state = HWS_DEALLOCATED;
 	rc = 0;
@@ -1068,7 +1068,7 @@ int hwsampler_shutdown(void)
 			hws_wq = NULL;
 		}
 
-		unregister_external_interrupt(0x1407, hws_ext_handler);
+		unregister_external_irq(EXT_IRQ_MEASURE_ALERT, hws_ext_handler);
 		hws_state = HWS_INIT;
 		rc = 0;
 	}

drivers/s390/block/dasd_diag.c

@@ -646,7 +646,7 @@ dasd_diag_init(void)
 	ASCEBC(dasd_diag_discipline.ebcname, 4);
 
 	irq_subclass_register(IRQ_SUBCLASS_SERVICE_SIGNAL);
-	register_external_interrupt(0x2603, dasd_ext_handler);
+	register_external_irq(EXT_IRQ_CP_SERVICE, dasd_ext_handler);
 	dasd_diag_discipline_pointer = &dasd_diag_discipline;
 	return 0;
 }
@@ -654,7 +654,7 @@ dasd_diag_init(void)
 static void __exit
 dasd_diag_cleanup(void)
 {
-	unregister_external_interrupt(0x2603, dasd_ext_handler);
+	unregister_external_irq(EXT_IRQ_CP_SERVICE, dasd_ext_handler);
 	irq_subclass_unregister(IRQ_SUBCLASS_SERVICE_SIGNAL);
 	dasd_diag_discipline_pointer = NULL;
 }

drivers/s390/char/sclp.c

@@ -972,7 +972,7 @@ sclp_check_interface(void)
 
 	spin_lock_irqsave(&sclp_lock, flags);
 	/* Prepare init mask command */
-	rc = register_external_interrupt(0x2401, sclp_check_handler);
+	rc = register_external_irq(EXT_IRQ_SERVICE_SIG, sclp_check_handler);
 	if (rc) {
 		spin_unlock_irqrestore(&sclp_lock, flags);
 		return rc;
@@ -1005,7 +1005,7 @@ sclp_check_interface(void)
 		} else
 			rc = -EBUSY;
 	}
-	unregister_external_interrupt(0x2401, sclp_check_handler);
+	unregister_external_irq(EXT_IRQ_SERVICE_SIG, sclp_check_handler);
 	spin_unlock_irqrestore(&sclp_lock, flags);
 	return rc;
 }
@@ -1206,7 +1206,7 @@ sclp_init(void)
 	if (rc)
 		goto fail_init_state_uninitialized;
 	/* Register interrupt handler */
-	rc = register_external_interrupt(0x2401, sclp_interrupt_handler);
+	rc = register_external_irq(EXT_IRQ_SERVICE_SIG, sclp_interrupt_handler);
 	if (rc)
 		goto fail_unregister_reboot_notifier;
 	sclp_init_state = sclp_init_state_initialized;

drivers/s390/kvm/kvm_virtio.c

@@ -477,7 +477,7 @@ static int __init kvm_devices_init(void)
 	INIT_WORK(&hotplug_work, hotplug_devices);
 
 	irq_subclass_register(IRQ_SUBCLASS_SERVICE_SIGNAL);
-	register_external_interrupt(0x2603, kvm_extint_handler);
+	register_external_irq(EXT_IRQ_CP_SERVICE, kvm_extint_handler);
 
 	scan_devices();
 	return 0;

net/iucv/iucv.c

@@ -2016,7 +2016,7 @@ static int __init iucv_init(void)
 	rc = iucv_query_maxconn();
 	if (rc)
 		goto out_ctl;
-	rc = register_external_interrupt(0x4000, iucv_external_interrupt);
+	rc = register_external_irq(EXT_IRQ_IUCV, iucv_external_interrupt);
 	if (rc)
 		goto out_ctl;
 	iucv_root = root_device_register("iucv");
@@ -2081,7 +2081,7 @@ out_free:
 	}
 	root_device_unregister(iucv_root);
 out_int:
-	unregister_external_interrupt(0x4000, iucv_external_interrupt);
+	unregister_external_irq(EXT_IRQ_IUCV, iucv_external_interrupt);
 out_ctl:
 	ctl_clear_bit(0, 1);
 out:
@@ -2116,7 +2116,7 @@ static void __exit iucv_exit(void)
 	}
 	root_device_unregister(iucv_root);
 	bus_unregister(&iucv_bus);
-	unregister_external_interrupt(0x4000, iucv_external_interrupt);
+	unregister_external_irq(EXT_IRQ_IUCV, iucv_external_interrupt);
 }
 
 subsys_initcall(iucv_init);