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 Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
  13 ---
  14  fs/ext4/super.c |    2 ++
  15  1 file changed, 2 insertions(+)
  16
  17 Index: linux-2.6.26-rc6/fs/ext4/super.c
  18 ===================================================================
  19 --- linux-2.6.26-rc6.orig/fs/ext4/super.c       2008-06-20 14:22:12.000000000 -0700
  20 +++ linux-2.6.26-rc6/fs/ext4/super.c    2008-06-23 15:10:51.000000000 -0700
  21 @@ -506,6 +506,7 @@ static void ext4_put_super (struct super
  22         ext4_ext_release(sb);
  23         ext4_xattr_put_super(sb);
  24         jbd2_journal_destroy(sbi->s_journal);
  25 +       sbi->s_journal = NULL;
  26         if (!(sb->s_flags & MS_RDONLY)) {
  27                 EXT4_CLEAR_INCOMPAT_FEATURE(sb, EXT4_FEATURE_INCOMPAT_RECOVER);
  28                 es->s_state = cpu_to_le16(sbi->s_mount_state);
  29 @@ -2423,6 +2424,7 @@ cantfind_ext4:
  30
  31  failed_mount4:
  32         jbd2_journal_destroy(sbi->s_journal);
  33 +       sbi->s_journal = NULL;
  34  failed_mount3:
  35         percpu_counter_destroy(&sbi->s_freeblocks_counter);
  36         percpu_counter_destroy(&sbi->s_freeinodes_counter);