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Date: Fri, 4 Dec 2009 05:14:44 +0300
From: Alexey Dobriyan <adobriyan@gmail.com>
To: linux-kernel@vger.kernel.org
Cc: mm-commits@vger.kernel.org, h-shimamoto@ct.jp.nec.com,
       chris.mason@oracle.com, konishi.ryusuke@lab.ntt.co.jp,
       swhiteho@redhat.com, tytso@mit.edu
Subject: Re: + task_struct-make-journal_info-conditional.patch added to -mm
 tree
Message-ID: <20091204021444.GA8392@x200>
References: <200912032240.nB3Mevae027408@imap1.linux-foundation.org>
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On Thu, Dec 03, 2009 at 02:40:57PM -0800, akpm@linux-foundation.org wrote:
> --- a/include/linux/sched.h~task_struct-make-journal_info-conditional
> +++ a/include/linux/sched.h
> @@ -1452,8 +1452,10 @@ struct task_struct {
>  	gfp_t lockdep_reclaim_gfp;
>  #endif
>  
> +#ifdef CONFIG_FS_JOURNAL_INFO
>  /* journalling filesystem info */
>  	void *journal_info;
> +#endif

This will prevent using e.g. ext3 on CONFIG_EXT3_FS=n kernels.
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