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Subject[PATCH 2/3] FRV: Permit __do_IRQ() to be dispensed with
Date
From: David Howells <dhowells@redhat.com>

Permit __do_IRQ() to be dispensed with based on a configuration option.

Signed-Off-By: David Howells <dhowells@redhat.com>
---

arch/frv/Kconfig | 4 ++++
include/linux/irq.h | 6 ++++++
kernel/irq/handle.c | 2 ++
3 files changed, 12 insertions(+), 0 deletions(-)

diff --git a/arch/frv/Kconfig b/arch/frv/Kconfig
index 130fe8f..69f9846 100644
--- a/arch/frv/Kconfig
+++ b/arch/frv/Kconfig
@@ -29,6 +29,10 @@ config GENERIC_HARDIRQS
bool
default y

+config GENERIC_HARDIRQS_NO__DO_IRQ
+ bool
+ default y
+
config GENERIC_TIME
bool
default y
diff --git a/include/linux/irq.h b/include/linux/irq.h
index fbf6d90..48d3cb3 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -320,7 +320,9 @@ handle_irq_name(void fastcall (*handle)(
* Monolithic do_IRQ implementation.
* (is an explicit fastcall, because i386 4KSTACKS calls it from assembly)
*/
+#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
extern fastcall unsigned int __do_IRQ(unsigned int irq, struct pt_regs *regs);
+#endif

/*
* Architectures call this to let the generic IRQ layer
@@ -332,10 +334,14 @@ static inline void generic_handle_irq(un
{
struct irq_desc *desc = irq_desc + irq;

+#ifdef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
+ desc->handle_irq(irq, desc, regs);
+#else
if (likely(desc->handle_irq))
desc->handle_irq(irq, desc, regs);
else
__do_IRQ(irq, regs);
+#endif
}

/* Handling of unhandled and spurious interrupts: */
diff --git a/kernel/irq/handle.c b/kernel/irq/handle.c
index fc4e906..2e9e800 100644
--- a/kernel/irq/handle.c
+++ b/kernel/irq/handle.c
@@ -149,6 +149,7 @@ irqreturn_t handle_IRQ_event(unsigned in
return retval;
}

+#ifndef CONFIG_GENERIC_HARDIRQS_NO__DO_IRQ
/**
* __do_IRQ - original all in one highlevel IRQ handler
* @irq: the interrupt number
@@ -248,6 +249,7 @@ out:

return 1;
}
+#endif

#ifdef CONFIG_TRACE_IRQFLAGS

-
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