other versions
- jessie 3.16.56-1+deb8u1
IRQ_DISABLE(9) | Internal Functions Provided | IRQ_DISABLE(9) |
NAME¶
irq_disable - Mark interrupt disabledSYNOPSIS¶
void
irq_disable(struct irq_desc * desc);
ARGUMENTS¶
descirq descriptor which should be disabled
DESCRIPTION¶
If the chip does not implement the irq_disable callback, we use a lazy disable approach. That means we mark the interrupt disabled, but leave the hardware unmasked. That's an optimization because we avoid the hardware access for the common case where no interrupt happens after we marked it disabled. If an interrupt happens, then the interrupt flow handler masks the line at the hardware level and marks it pending.AUTHORS¶
Thomas Gleixner <tglx@linutronix.de>Author.
Ingo Molnar <mingo@elte.hu>
Author.
COPYRIGHT¶
May 2018 | Kernel Hackers Manual 3.16 |