Index: stap-git-Oct-01/tapset/irq.stp
===================================================================
--- /dev/null
+++ stap-git-Oct-01/tapset/irq.stp
@@ -0,0 +1,160 @@
+/*
+ * Tracepoint based tapset for IRQs, Workqueues, etc
+ *
+ */
+// Probes for workqueues.
+
+/* probe workqueue.create : probes creation of a new workqueue
+ *	Variables :
+ *		wq_thread : task_struct of the workqueue thread.
+ *		cpu	  : cpu for which the worker thread is created.
+ */
+probe workqueue.create = kernel.trace("workqueue_creation")
+{
+	wq_thread = $wq_thread
+	cpu = $cpu
+}
+
+/* probe workqueue.insert : probes queuing of work on a workqueue
+ *	Variables :
+ *		wq_thread : 	task_struct of the workqueue thread.
+ *		work	  :	work_struct* being queued.
+ *		work_func :	pointer to handler func.
+ */
+probe workqueue.insert = kernel.trace("workqueue_insertion")
+{
+	wq_thread = $wq_thread
+	work = $work
+	work_func = @cast(work, "work_struct", "kernel")->func
+}
+
+/* probe workqueue.execute : probes execution of deferred work.
+ *	Variables :
+ *		wq_thread : 	task_struct of the workqueue thread.
+ *		work	  :	work_struct* being executed.
+ *		work_func :	pointer to handler func.
+ */
+probe workqueue.execute = kernel.trace("workqueue_execution")
+{
+	wq_thread = $wq_thread
+	work = $work
+	work_func = @cast(work, "work_struct", "kernel")->func
+}
+
+/* probe workqueue.destroy : probes destruction of each worker thread of each cpu for a workqueue.
+ *	Variables :
+ *		wq_thread : 	task_struct of the workqueue thread.
+ */
+probe workqueue.destroy = kernel.trace("workqueue_destruction")
+{
+	wq_thread = $wq_thread
+}
+
+// Probes for IRQ handlers.
+
+/* probe irq_handler.entry : Fires prior to execution of interrupt handler.
+ * 	variables :
+ *		irq 	: irq number.
+ * 		action	: struct irqaction* for this interrupt num.
+ *		handler	: interrupt handler function.
+ *		flags	:
+ *			IRQF_DISABLED [0x00000020]	: keep irqs disabled when calling action handler.
+ *			IRQF_SAMPLE_RANDOM [0x00000040]	: irq is used to feed the random generator
+ *			IRQF_SHARED [0x00000080]	: allow sharing the irq among several devices
+ *			IRQF_PROBE_SHARED [0x00000100]	: set by callers when they expect sharing mismatches to occur
+ *			IRQF_TIMER [0x00000200]		: Flag to mark this interrupt as timer interrupt
+ *			IRQF_PERCPU [0x00000400]	: Interrupt is per cpu.
+ *			IRQF_NOBALANCING [0x00000800]	: Flag to exclude this interrupt from irq balancing
+ *			IRQF_IRQPOLL [0x00001000]	: Interrupt is used for polling.
+ *			IRQF_ONESHOT [0x00002000]	: Interrupt is not reenabled after the hardirq handler finished.
+ *		dev_name: name of device.
+ *		dev_id	: Cookie to identify device.
+ *		next_irqaction	: pointer to next irqaction for shared interrupts.
+ *		dir	: pointer to the proc/irq/NN/name entry
+ *		thread_fn: interupt handler function for threaded interrupts.
+ *		thread	: thread pointer for threaded interrupts.
+ *		thread_flags: Flags related to thread.
+ */
+probe irq_handler.entry = kernel.trace("irq_handler_entry")
+{
+	irq = $irq
+	action = $action
+	handler = @cast($action, "irqaction", "kernel")->handler
+	flags = @cast($action, "irqaction", "kernel")->flags
+	dev_name = @cast($action, "irqaction", "kernel")->name
+	dev_id = @cast($action, "irqaction", "kernel")->dev_id
+	next_irqaction = @cast($action, "irqaction", "kernel")->next
+	dir = @cast($action, "irqaction", "kernel")->dir
+	thread_fn = @cast($action, "irqaction", "kernel")->thread_fn
+	thread = @cast($action, "irqaction", "kernel")->thread
+	thread_flags = @cast($action, "irqaction", "kernel")->thread_flags
+}
+
+/* probe irq_handler.exit : Fires just after execution of interrupt handler.
+ * 	variables :
+ *		irq 	: interrupt number
+ * 		action	: struct irqaction*
+ * 		ret	: return value of the handler
+ *		handler	: interrupt handler function that was executed.
+ *		flags	:
+ *			IRQF_DISABLED	[0x00000020]	: keep irqs disabled when calling action handler.
+ *			IRQF_SAMPLE_RANDOM [0x00000040]	: irq is used to feed the random generator
+ *			IRQF_SHARED [0x00000080]	: allow sharing the irq among several devices
+ *			IRQF_PROBE_SHARED [0x00000100]	: set by callers when they expect sharing mismatches to occur
+ *			IRQF_TIMER [0x00000200]		: Flag to mark this interrupt as timer interrupt
+ *			IRQF_PERCPU [0x00000400]	: Interrupt is per cpu.
+ *			IRQF_NOBALANCING [0x00000800]	: Flag to exclude this interrupt from irq balancing
+ *			IRQF_IRQPOLL [0x00001000]	: Interrupt is used for polling.
+ *			IRQF_ONESHOT [0x00002000]	: Interrupt is not reenabled after the hardirq handler finished.
+ *		dev_name: name of device.
+ *		dev_id	: Cookie to identify device.
+ *		next_irqaction	: pointer to next irqaction for shared interrupts.
+ *		dir	: pointer to the proc/irq/NN/name entry
+ *		thread_fn: interupt handler function for threaded interrupts.
+ *		thread	: thread pointer for threaded interrupts.
+ *		thread_flags: Flags related to thread.
+ */
+probe irq_handler.exit = kernel.trace("irq_handler_exit")
+{
+	irq = $irq
+	action = $action
+	ret = $ret
+	handler = @cast($action, "irqaction", "kernel")->handler
+	flags = @cast($action, "irqaction", "kernel")->flags
+	dev_name = @cast($action, "irqaction", "kernel")->name
+	dev_id = @cast($action, "irqaction", "kernel")->dev_id
+	next_irqaction = @cast($action, "irqaction", "kernel")->next
+	dir = @cast($action, "irqaction", "kernel")->dir
+	thread_fn = @cast($action, "irqaction", "kernel")->thread_fn
+	thread = @cast($action, "irqaction", "kernel")->thread
+	thread_flags = @cast($action, "irqaction", "kernel")->thread_flags
+}
+
+// Softirq based probes.
+/* probe softirq.entry 	: triggered just before executing handler for a pending
+ *			  softirq
+ *	variables :
+ *		h	: struct softirq_action* for current pending softirq.
+ *		vec	: softirq_action vector.
+ *		action	: pointer to softirq handler just about to execute.
+ */
+probe softirq.entry = kernel.trace("softirq_entry")
+{
+	h = $h
+	vec = $vec
+	action = @cast($h, "softirq_action", "kernel")->action
+}
+
+/* probe softirq.exit 	: triggered just after executing handler for a pending
+ *			  softirq.
+ *	variables :
+ *		h	: struct softirq_action* for just executed softirq.
+ *		vec	: softirq_action vector.
+ *		action	: pointer to softirq handler that just finished execution.
+ */
+probe softirq.exit = kernel.trace("softirq_exit")
+{
+	h = $h
+	vec = $vec
+	action = @cast($h, "softirq_action", "kernel")->action
+}
Index: stap-git-Oct-01/tapset/aux_syscalls.stp
===================================================================
--- stap-git-Oct-01.orig/tapset/aux_syscalls.stp
+++ stap-git-Oct-01/tapset/aux_syscalls.stp
@@ -1831,3 +1831,24 @@ function _struct_sigaction32_u:string(ua
     }
 #endif
 %}
+
+%{
+#include <linux/interrupt.h>
+static const _stp_val_array const _stp_irq_list[] = {
+	V(IRQF_DISABLED),
+	V(IRQF_SAMPLE_RANDOM),
+	V(IRQF_SHARED),
+	V(IRQF_PROBE_SHARED),
+	V(IRQF_TIMER),
+	V(IRQF_PERCPU),
+	V(IRQF_NOBALANCING),
+	V(IRQF_IRQPOLL),
+	V(IRQF_ONESHOT),
+	{0, NULL}
+};
+%}
+
+function _irqflags_str:string(f:long)
+%{ /* pure */
+	_stp_lookup_or_str(_stp_irq_list, THIS->f, THIS->__retvalue, MAXSTRINGLEN);
+%}