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

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Date:	Thu, 25 Oct 2007 11:39:56 -0500
From:	Eric Sandeen <sandeen@...hat.com>
To:	ext4 development <linux-ext4@...r.kernel.org>
CC:	johann.lombardi@...l.net, Mingming Cao <cmm@...ibm.com>
Subject: [PATCH] Fix oops with jbd-stats-through-procfs and external journal

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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