linux-kernel - Re: 2.6.24-rc6-mm1: __raw_spin_is

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Message-ID: <20071227022158.GA10204@nineveh.local>
Date:	Wed, 26 Dec 2007 21:21:58 -0500
From:	Joseph Fannin <jfannin@...il.com>
To:	Andrew Morton <akpm@...ux-foundation.org>
Cc:	linux-kernel@...r.kernel.org, Nick Piggin <npiggin@...e.de>,
	Ingo Molnar <mingo@...e.hu>,
	Thomas Gleixner <tglx@...utronix.de>
Subject: Re: 2.6.24-rc6-mm1: __raw_spin_is_contended undefined

On Sat, Dec 22, 2007 at 11:30:56PM -0800, Andrew Morton wrote:
>
> ftp://ftp.kernel.org/pub/linux/kernel/people/akpm/patches/2.6/2.6.24-rc6/2.6.24-rc6-mm1/
>

This doesn't build on powerpc with my .config:

In file included from arch/powerpc/kernel/asm-offsets.c:17:
include/linux/sched.h: In function ‘spin_needbreak’:
include/linux/sched.h:1947: error: implicit declaration of function ‘__raw_spin_is_contended’

I don't see where __raw_spin_is_contended is defined for any arch
other than x86, so I guess this will happen on any non-x86 arch when
SMP=y and PREEMPT=y are set?

This comes from "spinlock: lockbreak cleanup" in git-x86.

--
Joseph Fannin
jfannin@...il.com
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