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diff --git a/kernel/irq/Kconfig b/kernel/irq/Kconfig
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+menu "IRQ subsystem"
+# Options selectable by the architecture code
+
+# Make sparse irq Kconfig switch below available
+config MAY_HAVE_SPARSE_IRQ
+ bool
+
+# Legacy support, required for itanic
+config GENERIC_IRQ_LEGACY
+ bool
+
+# Enable the generic irq autoprobe mechanism
+config GENERIC_IRQ_PROBE
+ bool
+
+# Use the generic /proc/interrupts implementation
+config GENERIC_IRQ_SHOW
+ bool
+
+# Print level/edge extra information
+config GENERIC_IRQ_SHOW_LEVEL
+ bool
+
+# Facility to allocate a hardware interrupt. This is legacy support
+# and should not be used in new code. Use irq domains instead.
+config GENERIC_IRQ_LEGACY_ALLOC_HWIRQ
+ bool
+
+# Support for delayed migration from interrupt context
+config GENERIC_PENDING_IRQ
+ bool
+
+# Alpha specific irq affinity mechanism
+config AUTO_IRQ_AFFINITY
+ bool
+
+# Tasklet based software resend for pending interrupts on enable_irq()
+config HARDIRQS_SW_RESEND
+ bool
+
+# Preflow handler support for fasteoi (sparc64)
+config IRQ_PREFLOW_FASTEOI
+ bool
+
+# Edge style eoi based handler (cell)
+config IRQ_EDGE_EOI_HANDLER
+ bool
+
+# Generic configurable interrupt chip implementation
+config GENERIC_IRQ_CHIP
+ bool
+ select IRQ_DOMAIN
+
+# Generic irq_domain hw <--> linux irq number translation
+config IRQ_DOMAIN
+ bool
+
+# Support for hierarchical irq domains
+config IRQ_DOMAIN_HIERARCHY
+ bool
+ select IRQ_DOMAIN
+
+# Generic MSI interrupt support
+config GENERIC_MSI_IRQ
+ bool
+
+# Generic MSI hierarchical interrupt domain support
+config GENERIC_MSI_IRQ_DOMAIN
+ bool
+ select IRQ_DOMAIN_HIERARCHY
+ select GENERIC_MSI_IRQ
+
+config HANDLE_DOMAIN_IRQ
+ bool
+
+config IRQ_DOMAIN_DEBUG
+ bool "Expose hardware/virtual IRQ mapping via debugfs"
+ depends on IRQ_DOMAIN && DEBUG_FS
+ help
+ This option will show the mapping relationship between hardware irq
+ numbers and Linux irq numbers. The mapping is exposed via debugfs
+ in the file "irq_domain_mapping".
+
+ If you don't know what this means you don't need it.
+
+# Support forced irq threading
+config IRQ_FORCED_THREADING
+ bool
+
+config SPARSE_IRQ
+ bool "Support sparse irq numbering" if MAY_HAVE_SPARSE_IRQ
+ ---help---
+
+ Sparse irq numbering is useful for distro kernels that want
+ to define a high CONFIG_NR_CPUS value but still want to have
+ low kernel memory footprint on smaller machines.
+
+ ( Sparse irqs can also be beneficial on NUMA boxes, as they spread
+ out the interrupt descriptors in a more NUMA-friendly way. )
+
+ If you don't know what to do here, say N.
+
+endmenu