linux-ext4 - Re: [PATCH] Fix oops with jbd-stats-through-procfs and external journal

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Date:	Thu, 25 Oct 2007 12:24:06 -0700
From:	Mingming Cao <cmm@...ibm.com>
To:	Eric Sandeen <sandeen@...hat.com>
Cc:	ext4 development <linux-ext4@...r.kernel.org>,
	johann.lombardi@...l.net
Subject: Re: [PATCH] Fix oops with jbd-stats-through-procfs and external
	journal

Thanks, Added to ext4 patch queue at
http://repo.or.cz/w/ext4-patch-queue.git

On Thu, 2007-10-25 at 11:39 -0500, Eric Sandeen wrote:
> When using an external device for the journal,
> jbd2_stats_proc_init() wants to use journal->j_dev in its call
> to bdevname() but it's not assigned yet, resulting in an oops.
> 
> Signed-off-by: Eric Sandeen <sandeen@...hat.com>
> 
> --- linux.orig/fs/jbd2/journal.c	2007-10-25 11:36:25.772354262 -0500
> +++ linux/fs/jbd2/journal.c	2007-10-25 11:36:35.058278242 -0500
> @@ -1035,11 +1035,11 @@
>  		journal = NULL;
>  		goto out;
>  	}
> -	jbd2_stats_proc_init(journal);
>  	journal->j_dev = bdev;
>  	journal->j_fs_dev = fs_dev;
>  	journal->j_blk_offset = start;
>  	journal->j_maxlen = len;
> +	jbd2_stats_proc_init(journal);
> 
>  	bh = __getblk(journal->j_dev, start, journal->j_blocksize);
>  	J_ASSERT(bh != NULL);
> 
> -
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