linux-kernel - Re: 2.6.25.8-rt7

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Date:	Tue, 24 Jun 2008 16:15:49 +0200
From:	Juergen Beisert <jbe@...gutronix.de>
To:	linux-rt-users@...r.kernel.org
Cc:	Steven Rostedt <rostedt@...dmis.org>,
	LKML <linux-kernel@...r.kernel.org>, Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: 2.6.25.8-rt7

On Tuesday 24 June 2008 03:34, Steven Rostedt wrote:
> We are pleased to announce the 2.6.25.8-rt7 tree, which can be
> downloaded from the location:
>
>   http://rt.et.redhat.com/download/
>
> Information on the RT patch can be found at:
>
>   http://rt.wiki.kernel.org/index.php/Main_Page
>
> Changes since 2.6.25.4-rt6
>
>   - ported to 2.6.25.8
>
>   - rwlock pi_lock fixes on waking up multiple readers (Steven Rostedt)
>
>   - revert adaptive locks from RCU (Thomas Gleixner)
>      [ for some reason, using RCU causes some latency spikes, this
>        may be a sign of something going wrong in RCU itself ]
>
>   - rwlock mutex owner fix for waking up reader with readers held
>                                                   (Steven Rostedt)
>
>   - rwlock remove waiter from pi_list on above fix (Steven Rostedt and
>                                                     Thomas Gleixner)
>
>   - rwlock replace macro with inline (Thomas Gleixner)
>
>   - rwlock pending namespace updates (Thomas Gleixner)
>
>   - futex fix fault (Thomas Gleixner)
>
> to build a 2.6.25.8-rt7 tree, the following patches should be applied:
>
>   http://www.kernel.org/pub/linux/kernel/v2.6/linux-2.6.25.tar.bz2
>   http://kernel.org/pub/linux/kernel/v2.6/patch-2.6.25.8.bz2
>   http://rt.et.redhat.com/download/patch-2.6.25.8-rt7.bz2

This occurs when I try to build a PowerPC (MPC5200) kernel:

[...]
In file included from kernel/sched.c:1318:
kernel/sched.c: In function 'sched_init':
kernel/sched.c:7702: error: implicit declaration of function 'global_rt_runtime'
[...]

And when I'm using the patch from Uli Brueggemann to fix it, I get:

[...]
In file included from kernel/sched.c:1325:
kernel/sched_rt.c: In function 'inc_rt_tasks':
kernel/sched_rt.c:290: error: 'struct rq' has no member named 'online'
[...]

Any hints?

Juergen Beisert

-- 
Dipl.-Ing. Juergen Beisert | http://www.pengutronix.de
 Pengutronix - Linux Solutions for Science and Industry
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