ext4-Set-journal-pointer-to-NULL-when-journal-is-released.patch

   1 ext4: Set journal pointer to NULL when journal is released
   2
   3 From: Jan Kara <jack@suse.cz>
   4
   5 Set sbi->s_journal to NULL after we call journal_destroy(). This
   6 will be later needed because after journal_destroy() is called,
   7 ext4_clear_inode() can still be called for some inodes (e.g. root
   8 inode) and we'll need to detect there that journal doesn't exists
   9 anymore.
  10
  11 Signed-off-by: Jan Kara <jack@suse.cz>
  12 ---
  13  fs/ext4/super.c |    2 ++
  14  1 file changed, 2 insertions(+)
  15
  16 Index: linux-2.6.26-rc5/fs/ext4/super.c
  17 ===================================================================
  18 --- linux-2.6.26-rc5.orig/fs/ext4/super.c       2008-06-06 17:03:48.000000000 -0700
  19 +++ linux-2.6.26-rc5/fs/ext4/super.c    2008-06-06 17:03:52.000000000 -0700
  20 @@ -506,6 +506,7 @@ static void ext4_put_super (struct super
  21         ext4_ext_release(sb);
  22         ext4_xattr_put_super(sb);
  23         jbd2_journal_destroy(sbi->s_journal);
  24 +       sbi->s_journal = NULL;
  25         if (!(sb->s_flags & MS_RDONLY)) {
  26                 EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
  27                 es->s_state = cpu_to_le16(sbi->s_mount_state);
  28 @@ -2423,6 +2424,7 @@ cantfind_ext4:
  29
  30  failed_mount4:
  31         jbd2_journal_destroy(sbi->s_journal);
  32 +       sbi->s_journal = NULL;
  33  failed_mount3:
  34         percpu_counter_destroy(&sbi->s_freeblocks_counter);
  35         percpu_counter_destroy(&sbi->s_freeinodes_counter);