Re: [PATCH 20/62] sparc: irq: Remove IRQF_DISABLED

David Miller
2011-09-07T17:13:44Z

From: Yong Zhang <yong.zhang0@gmail.com>
Date: Wed, 7 Sep 2011 16:10:17 +0800

> This flag is a NOOP and can be removed now.
>
> Signed-off-by: Yong Zhang <yong.zhang0@gmail.com>

How are things working now, if that is the case?

Specifically in the ldc_bind() case, we're passing iRQF_DISABLED here
so that the IRQ is not turned on when we request the IRQ, we later do
enable_irq() on these after we've take the spinlock in this function.

The IRQ cannot be allowed to be delivered between the request_irq()
call and the enable_irq() calls.

This sequence is necessary to deal with some lock ordering issues.