linux-kernel - Re: v2.6.23-rc4-rt1 / new project URL

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Date:	Fri, 31 Aug 2007 17:01:26 -0700
From:	Daniel Walker <dwalker@...sta.com>
To:	Thomas Gleixner <tglx@...utronix.de>
Cc:	LKML <linux-kernel@...r.kernel.org>,
	RT-Users <linux-rt-users@...r.kernel.org>,
	Ingo Molnar <mingo@...e.hu>
Subject: Re: v2.6.23-rc4-rt1 / new project URL

On Fri, 2007-08-31 at 22:59 +0200, Thomas Gleixner wrote:
> We're pleased to announce the release of the v2.6.23-rc4-rt1 kernel,
> which can be downloaded from a new place:
>  
>    http://www.kernel.org/pub/linux/kernel/projects/rt/
>  
> The move to kernel.org is experimental for now, we'll keep it if it
> works out fine.
> 
> Changes since 2.6.23-rc2-rt2:
> 
> - update to -rc4
> - update to 2.6.23-rc4-hrt1
> 
> - UP compile fixes back merged (Kevin Hilman / Steven Rostedt)
> - various latency tracer fixes (Steven Rostedt)

I'm not sure which latency tracing fixes these are, but Steven's
get_monotonic_cycles() changes are racy .. It might be a little
premature to include them .. It at least fouls latency tracing on my
test machine.

> - simple_irq change (Kevin Hilman): needs more thought
> - RCU updates (Paul McKenney): needs proper integration
> - latency tracer changes (Daniel Walker): needs review
> - PICK_OP changes (Daniel Walker): needs review

The PICK_OP changes got reviewed by Ingo , as of,

http://marc.info/?l=linux-rt-users&m=118638506125380&w=2

They do need one small fix tho .. Below ..

Signed-off-by: Daniel Walker <dwalker@...sta.com>

Index: linux-2.6.22/include/linux/spinlock.h
===================================================================
--- linux-2.6.22.orig/include/linux/spinlock.h	2007-09-01 00:08:04.000000000 +0000
+++ linux-2.6.22/include/linux/spinlock.h	2007-09-01 00:07:48.000000000 +0000
@@ -501,7 +501,7 @@ do {									\
 
 #define spin_trylock_irq(lock)	\
 	__cond_lock(lock, PICK_SPIN_OP_RET(__spin_trylock_irq,		\
-		__spin_trylock_irq, lock))
+		_spin_trylock_irq, lock))
 
 #define spin_trylock_irqsave(lock, flags) \
 	__cond_lock(lock, PICK_SPIN_OP_RET(__spin_trylock_irqsave, 	\


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