linux-ext4 - [PATCH 2/5] ext4: Set journal pointer to NULL when journal is released

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Message-ID: <20080604155610.GH16572@duck.suse.cz>
Date:	Wed, 4 Jun 2008 17:56:10 +0200
From:	Jan Kara <jack@...e.cz>
To:	linux-ext4@...r.kernel.org
Subject: [PATCH 2/5] ext4: Set journal pointer to NULL when journal is
	released

From: Jan Kara <jack@...e.cz>
Date: Wed, 21 May 2008 17:01:22 +0200
Subject: [PATCH] ext4: Set journal pointer to NULL when journal is released

Set sbi->s_journal to NULL after we call journal_destroy(). This
will be later needed because after journal_destroy() is called,
ext4_clear_inode() can still be called for some inodes (e.g. root
inode) and we'll need to detect there that journal doesn't exists
anymore.

Signed-off-by: Jan Kara <jack@...e.cz>
---
 fs/ext4/super.c |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)

Index: linux-2.6-linus/fs/ext4/super.c
===================================================================
--- linux-2.6-linus.orig/fs/ext4/super.c
+++ linux-2.6-linus/fs/ext4/super.c
@@ -506,6 +506,7 @@ static void ext4_put_super (struct super
 	ext4_ext_release(sb);
 	ext4_xattr_put_super(sb);
 	jbd2_journal_destroy(sbi->s_journal);
+	sbi->s_journal = NULL;
 	if (!(sb->s_flags & MS_RDONLY)) {
 		EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
 		es->s_state = cpu_to_le16(sbi->s_mount_state);
@@ -2398,6 +2399,7 @@ cantfind_ext4:
 
 failed_mount4:
 	jbd2_journal_destroy(sbi->s_journal);
+	sbi->s_journal = NULL;
 failed_mount3:
 	percpu_counter_destroy(&sbi->s_freeblocks_counter);
 	percpu_counter_destroy(&sbi->s_freeinodes_counter);
--
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