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>

10 files changed, 30 insertions, 23 deletions

diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index 58c1ea6..763ccdc 100644
--- a/arch/s390/include/asm/irq.h
+++ b/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,
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index bb27a26..083617d 100644
--- a/arch/s390/kernel/irq.c
+++ b/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);
diff --git a/arch/s390/kernel/perf_cpum_cf.c b/arch/s390/kernel/perf_cpum_cf.c
index f51214c..ea75d01 100644
--- a/arch/s390/kernel/perf_cpum_cf.c
+++ b/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);
diff --git a/arch/s390/kernel/perf_cpum_sf.c b/arch/s390/kernel/perf_cpum_sf.c
index 6c0d298..ea0c7b2 100644
--- a/arch/s390/kernel/perf_cpum_sf.c
+++ b/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);
diff --git a/arch/s390/kernel/runtime_instr.c b/arch/s390/kernel/runtime_instr.c
index d817cce..26b4ae9 100644
--- a/arch/s390/kernel/runtime_instr.c
+++ b/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
diff --git a/arch/s390/kernel/sclp.S b/arch/s390/kernel/sclp.S
index 29bd7be..a41f2c9 100644
--- a/arch/s390/kernel/sclp.S
+++ b/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
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 8827883..366d144 100644
--- a/arch/s390/kernel/smp.c
+++ b/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();
 }
diff --git a/arch/s390/kernel/time.c b/arch/s390/kernel/time.c
index dd95f163..386d37a 100644
--- a/arch/s390/kernel/time.c
+++ b/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)
diff --git a/arch/s390/mm/fault.c b/arch/s390/mm/fault.c
index d95265b2..750565f 100644
--- a/arch/s390/mm/fault.c
+++ b/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;
diff --git a/arch/s390/oprofile/hwsampler.c b/arch/s390/oprofile/hwsampler.c
index a32c967..276f2e2 100644
--- a/arch/s390/oprofile/hwsampler.c
+++ b/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;
 	}