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AIX Version 4.3 Kernel and Subsystems Technical Reference, Volume 1

i_unmask Kernel Service


Enables a bus interrupt level.


#include <sys/types.h>
#include <sys/errno.h>
#include <sys/intr.h>
void i_unmask (handler)
struct intr *handler;


handler Specifies the address of the interrupt handler structure that was passed to the i_init service.


The i_unmask service enables the bus interrupt level specified by the handler parameter.

Execution Environment

The i_unmask kernel service can be called from either the process or interrupt environment.

Return Values

The i_unmask service has no return values.

Implementation Specifics

The i_unmask kernel service is part of Base Operating System (BOS) Runtime.

Related Information

The i_init kernel service, i_mask kernel service.

Understanding Interrupts, I/O Kernel Services, Processing Interrupts in AIX Kernel Extensions and Device Support Programming Concepts.

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