[PATCH] genirq: add ->retrigger() irq op to consolidate hw_irq_resend()

Add ->retrigger() irq op to consolidate hw_irq_resend() implementations.
(Most architectures had it defined to NOP anyway.)

NOTE: ia64 needs testing. i386 and x86_64 tested.

Signed-off-by: Ingo Molnar <mingo@elte.hu>
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>

5 files changed, 33 insertions, 10 deletions

diff --git a/arch/i386/kernel/io_apic.c b/arch/i386/kernel/io_apic.c
index afe54f257cb8..ec9ea0269d36 100644
--- a/arch/i386/kernel/io_apic.c
+++ b/arch/i386/kernel/io_apic.c
@@ -2071,6 +2071,13 @@ static void set_ioapic_affinity_vector (unsigned int vector,
 #endif
 #endif
 
+static int ioapic_retrigger(unsigned int irq)
+{
+	send_IPI_self(IO_APIC_VECTOR(irq));
+
+	return 1;
+}
+
 /*
  * Level and edge triggered IO-APIC interrupts need different handling,
  * so we use two separate IRQ descriptors. Edge triggered IRQs can be
@@ -2090,6 +2097,7 @@ static struct hw_interrupt_type ioapic_edge_type __read_mostly = {
 #ifdef CONFIG_SMP
 	.set_affinity 	= set_ioapic_affinity,
 #endif
+	.retrigger	= ioapic_retrigger,
 };
 
 static struct hw_interrupt_type ioapic_level_type __read_mostly = {
@@ -2103,6 +2111,7 @@ static struct hw_interrupt_type ioapic_level_type __read_mostly = {
 #ifdef CONFIG_SMP
 	.set_affinity 	= set_ioapic_affinity,
 #endif
+	.retrigger	= ioapic_retrigger,
 };
 
 static inline void init_IO_APIC_traps(void)
diff --git a/arch/ia64/kernel/irq_lsapic.c b/arch/ia64/kernel/irq_lsapic.c
index ea14e6a04409..1ab58b09f3d7 100644
--- a/arch/ia64/kernel/irq_lsapic.c
+++ b/arch/ia64/kernel/irq_lsapic.c
@@ -26,6 +26,13 @@ lsapic_noop (unsigned int irq)
 	/* nuthing to do... */
 }
 
+static int lsapic_retrigger(unsigned int irq)
+{
+	ia64_resend_irq(irq);
+
+	return 1;
+}
+
 struct hw_interrupt_type irq_type_ia64_lsapic = {
 	.typename =	"LSAPIC",
 	.startup =	lsapic_noop_startup,
@@ -33,5 +40,6 @@ struct hw_interrupt_type irq_type_ia64_lsapic = {
 	.enable =	lsapic_noop,
 	.disable =	lsapic_noop,
 	.ack =		lsapic_noop,
-	.end =		lsapic_noop
+	.end =		lsapic_noop,
+	.retrigger =	lsapic_retrigger,
 };
diff --git a/arch/ia64/kernel/perfmon.c b/arch/ia64/kernel/perfmon.c
index 6d7bc8ff7b3a..a0055d3d695c 100644
--- a/arch/ia64/kernel/perfmon.c
+++ b/arch/ia64/kernel/perfmon.c
@@ -6165,7 +6165,7 @@ pfm_load_regs (struct task_struct *task)
 		/*
 		 * will replay the PMU interrupt
 		 */
-		if (need_irq_resend) hw_resend_irq(NULL, IA64_PERFMON_VECTOR);
+		if (need_irq_resend) ia64_resend_irq(IA64_PERFMON_VECTOR);
 
 		pfm_stats[smp_processor_id()].pfm_replay_ovfl_intr_count++;
 	}
@@ -6305,7 +6305,7 @@ pfm_load_regs (struct task_struct *task)
 		/*
 		 * will replay the PMU interrupt
 		 */
-		if (need_irq_resend) hw_resend_irq(NULL, IA64_PERFMON_VECTOR);
+		if (need_irq_resend) ia64_resend_irq(IA64_PERFMON_VECTOR);
 
 		pfm_stats[smp_processor_id()].pfm_replay_ovfl_intr_count++;
 	}
diff --git a/arch/parisc/kernel/irq.c b/arch/parisc/kernel/irq.c
index ea6a55e1a0c5..82fe6ba29727 100644
--- a/arch/parisc/kernel/irq.c
+++ b/arch/parisc/kernel/irq.c
@@ -125,6 +125,10 @@ static struct hw_interrupt_type cpu_interrupt_type = {
 #ifdef CONFIG_SMP
 	.set_affinity	= cpu_set_affinity_irq,
 #endif
+	/* XXX: Needs to be written.  We managed without it so far, but
+	 * we really ought to write it.
+	 */
+	.retrigger	= NULL,
 };
 
 int show_interrupts(struct seq_file *p, void *v)
@@ -404,13 +408,6 @@ void __init init_IRQ(void)
 
 }
 
-void hw_resend_irq(struct hw_interrupt_type *type, unsigned int irq)
-{
-	/* XXX: Needs to be written.  We managed without it so far, but
-	 * we really ought to write it.
-	 */
-}
-
 void ack_bad_irq(unsigned int irq)
 {
 	printk("unexpected IRQ %d\n", irq);
diff --git a/arch/x86_64/kernel/io_apic.c b/arch/x86_64/kernel/io_apic.c
index 88a8736eb8ce..401b687fef21 100644
--- a/arch/x86_64/kernel/io_apic.c
+++ b/arch/x86_64/kernel/io_apic.c
@@ -1618,6 +1618,13 @@ static void set_ioapic_affinity_vector (unsigned int vector,
 #endif // CONFIG_SMP
 #endif // CONFIG_PCI_MSI
 
+static int ioapic_retrigger(unsigned int irq)
+{
+	send_IPI_self(IO_APIC_VECTOR(irq));
+
+	return 1;
+}
+
 /*
  * Level and edge triggered IO-APIC interrupts need different handling,
  * so we use two separate IRQ descriptors. Edge triggered IRQs can be
@@ -1638,6 +1645,7 @@ static struct hw_interrupt_type ioapic_edge_type __read_mostly = {
 #ifdef CONFIG_SMP
 	.set_affinity = set_ioapic_affinity,
 #endif
+	.retrigger	= ioapic_retrigger,
 };
 
 static struct hw_interrupt_type ioapic_level_type __read_mostly = {
@@ -1651,6 +1659,7 @@ static struct hw_interrupt_type ioapic_level_type __read_mostly = {
 #ifdef CONFIG_SMP
 	.set_affinity = set_ioapic_affinity,
 #endif
+	.retrigger	= ioapic_retrigger,
 };
 
 static inline void init_IO_APIC_traps(void)