enable_irq
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## Name

enable_irq — enable handling of an irq

## Synopsis

`void enable_irq (` | unsigned int irq`)`;

## Arguments

`irq`

  Interrupt to enable

## Description

Undoes the effect of one call to `disable_irq`. If this matches the last disable, processing of interrupts on this IRQ line is re-enabled.

This function may be called from IRQ context only when desc->irq_data.chip->bus_lock and desc->chip->bus_sync_unlock are NULL !

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