linux-kernel - Re: Section mismatch: reference to .init.text: (between 'kthreadd' and 'init_waitqueue

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Date:	Thu, 2 Aug 2007 16:05:24 +0530 (IST)
From:	Satyam Sharma <satyam@...radead.org>
To:	John Sigler <linux.kernel@...e.fr>
cc:	linux-rt-users@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: Section mismatch: reference to .init.text: (between 'kthreadd'
 and 'init_waitqueue_head')



On Thu, 2 Aug 2007, John Sigler wrote:

> Hello,
> 
> I'm trying to build a 2.6.22.1-rt9 kernel for a P3.
> 
> I used 'make xconfig' to create .config
> http://linux.kernel.free.fr/latency/config-2.6.22.1-rt9-adlink
> 
> I get the following warning:
> 
>   LD      vmlinux
>   SYSMAP  System.map
>   SYSMAP  .tmp_System.map
>   MODPOST vmlinux
> WARNING: kernel/built-in.o(.text+0x19152): Section mismatch: reference to
> .init.text: (between 'kthreadd' and 'init_waitqueue_head')

This is a bogus warning, already taken care of in 2.6.23-rc1-latestgit.

> Finally, I note that X86_CMPXCHG64 is no longer defined since its
> specification was changed between 2.6.20 and 2.6.22.
> 
>  config X86_CMPXCHG64
>     bool
> -   depends on !M386 && !M486
> +   depends on X86_PAE
>     default y
> 
> Will this have an impact on spinlocks? RCU? something else?

No idea about this one.
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