2 files changed, 39 insertions, 0 deletions

diff --git a/include/linux/irq.h b/include/linux/irq.h
index a19b381d4112..bfd9efb5cb49 100644
--- a/include/linux/irq.h
+++ b/include/linux/irq.h
@@ -367,6 +367,9 @@ set_irq_chained_handler(unsigned int irq,
         __set_irq_handler(irq, handle, 1, NULL);
 }
 
+extern void set_irq_noprobe(unsigned int irq);
+extern void set_irq_probe(unsigned int irq);
+
 /* Handle dynamic irq creation and destruction */
 extern int create_irq(void);
 extern void destroy_irq(unsigned int irq);
diff --git a/kernel/irq/chip.c b/kernel/irq/chip.c
index 10e006643c8c..cc54c6276356 100644
--- a/kernel/irq/chip.c
+++ b/kernel/irq/chip.c
@@ -589,3 +589,39 @@ set_irq_chip_and_handler_name(unsigned int irq, struct irq_chip *chip,
         set_irq_chip(irq, chip);
         __set_irq_handler(irq, handle, 0, name);
 }
+
+void __init set_irq_noprobe(unsigned int irq)
+{
+        struct irq_desc *desc;
+        unsigned long flags;
+
+        if (irq >= NR_IRQS) {
+                printk(KERN_ERR "Trying to mark IRQ%d non-probeable\n", irq);
+
+                return;
+        }
+
+        desc = irq_desc + irq;
+
+        spin_lock_irqsave(&desc->lock, flags);
+        desc->status |= IRQ_NOPROBE;
+        spin_unlock_irqrestore(&desc->lock, flags);
+}
+
+void __init set_irq_probe(unsigned int irq)
+{
+        struct irq_desc *desc;
+        unsigned long flags;
+
+        if (irq >= NR_IRQS) {
+                printk(KERN_ERR "Trying to mark IRQ%d probeable\n", irq);
+
+                return;
+        }
+
+        desc = irq_desc + irq;
+
+        spin_lock_irqsave(&desc->lock, flags);
+        desc->status &= ~IRQ_NOPROBE;
+        spin_unlock_irqrestore(&desc->lock, flags);
+}