From 2a3a2d66aa4e5abaf8f9222d21735321f02a00dc Mon Sep 17 00:00:00 2001
From: Heiko Carstens <heiko.carstens@de.ibm.com>
Date: Sun, 30 Oct 2011 15:17:19 +0100
Subject: [S390] irqstats: split IPI interrupt accounting

We use both the external call and emergency call IPIs to signal remote
cpus. Therefore it makes sense to account them differently withing
/proc/irqstats so we actually know what happened.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>

diff --git a/arch/s390/include/asm/irq.h b/arch/s390/include/asm/irq.h
index eadfa9f..ba6d85f 100644
--- a/arch/s390/include/asm/irq.h
+++ b/arch/s390/include/asm/irq.h
@@ -8,7 +8,8 @@ enum interruption_class {
 	EXTERNAL_INTERRUPT,
 	IO_INTERRUPT,
 	EXTINT_CLK,
-	EXTINT_IPI,
+	EXTINT_EXC,
+	EXTINT_EMS,
 	EXTINT_TMR,
 	EXTINT_TLA,
 	EXTINT_PFL,
diff --git a/arch/s390/kernel/irq.c b/arch/s390/kernel/irq.c
index 30faaef..b9a7fdd 100644
--- a/arch/s390/kernel/irq.c
+++ b/arch/s390/kernel/irq.c
@@ -33,7 +33,8 @@ static const struct irq_class intrclass_names[] = {
 	{.name = "EXT" },
 	{.name = "I/O" },
 	{.name = "CLK", .desc = "[EXT] Clock Comparator" },
-	{.name = "IPI", .desc = "[EXT] Signal Processor" },
+	{.name = "EXC", .desc = "[EXT] External Call" },
+	{.name = "EMS", .desc = "[EXT] Emergency Signal" },
 	{.name = "TMR", .desc = "[EXT] CPU Timer" },
 	{.name = "TAL", .desc = "[EXT] Timing Alert" },
 	{.name = "PFL", .desc = "[EXT] Pseudo Page Fault" },
diff --git a/arch/s390/kernel/smp.c b/arch/s390/kernel/smp.c
index 3bde568..3ea8728 100644
--- a/arch/s390/kernel/smp.c
+++ b/arch/s390/kernel/smp.c
@@ -187,7 +187,10 @@ static void do_ext_call_interrupt(unsigned int ext_int_code,
 {
 	unsigned long bits;
 
-	kstat_cpu(smp_processor_id()).irqs[EXTINT_IPI]++;
+	if (ext_int_code == 0x1202)
+		kstat_cpu(smp_processor_id()).irqs[EXTINT_EXC]++;
+	else
+		kstat_cpu(smp_processor_id()).irqs[EXTINT_EMS]++;
 	/*
 	 * handle bit signal external calls
 	 */
-- 
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