probe_irq_mask(9)
NAME
probe_irq_mask - scan a bitmap of interrupt lines
SYNOPSIS
unsigned int probe_irq_mask (unsigned long val);
ARGUMENTS
val mask of interrupts to consider
DESCRIPTION
Scan the ISA bus interrupt lines and return a bitmap of
active interrupts. The interrupt probe logic state is then
returned to its previous value.
NOTE
- we need to scan all the irq's even though we will only
- return ISA irq numbers - just so that we reset them all to
a known state.