linux-kernel - Re: [PATCH] atmel_serial: Split the interrupt handler

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Message-ID: <3efb10970712181118w58daac1dw52f776ccf1dd0eae@mail.gmail.com>
Date:	Tue, 18 Dec 2007 20:18:30 +0100
From:	"Remy Bohmer" <linux@...mer.net>
To:	"Haavard Skinnemoen" <hskinnemoen@...el.com>
Cc:	"Andrew Victor" <linux@...im.org.za>,
	"ARM Linux Mailing List" <linux-arm-kernel@...ts.arm.linux.org.uk>,
	"Russell King - ARM Linux" <linux@....linux.org.uk>,
	linux-kernel@...r.kernel.org
Subject: Re: [PATCH] atmel_serial: Split the interrupt handler

Hello Haavard,

> > BTW: Attached I have added a 2nd patch that I use for Preempt-RT. (For
> > cleaner startup, and to get rid of useless IRQ-threads.
>
> Hrm. That assumption isn't valid on AVR32...on AP7000, for example,
> IRQ1 is used by the LCD controller.

In that case, forget that (dirty) patch completely for now. It does
not break things on Preempt-RT, we only will have a IRQ-1 kernel
thread that is never scheduled. (Of which I think is actually a
irq-manage bug, if there are no handlers that are scheduled on that
thread, it should not even start the thread.)

I will verify/test the complete patchset tomorrow.

Kind Regards,

Remy
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