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(Sorry for toppost)

I believe this is my fault. You must be building for uniprocessor? Ingo has a fix for this issue in sched-devel that should be pulled into -rt.

Sorry for the inconvenience. I will pull the patch myself and submit it when I get home (if someone doesn't beat me to it)

-----Original Message-----
From: Juergen Beisert <>
Cc: Ingo Molnar <>
Cc: Steven Rostedt <>
Cc: Thomas Gleixner <>
Cc: LKML <>
To: <>

Sent: 6/24/2008 8:15:49 AM
Subject: Re:

On Tuesday 24 June 2008 03:34, Steven Rostedt wrote:
> We are pleased to announce the tree, which can be
> downloaded from the location:
> Information on the RT patch can be found at:
> Changes since
> - ported to
> - 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 tree, the following patches should be applied:

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 |
Pengutronix - Linux Solutions for Science and Industry
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