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    Subject[15/34] ext4: fix uninit block bitmap initialization when s_meta_first_bg is non-zero
    2.6.32-stable review patch.  If anyone has any objections, please let us know.

    ------------------

    (cherry picked from commit 8dadb198cb70ef811916668fe67eeec82e8858dd)

    The number of old-style block group descriptor blocks is
    s_meta_first_bg when the meta_bg feature flag is set.

    Signed-off-by: "Theodore Ts'o" <tytso@mit.edu>
    Signed-off-by: Greg Kroah-Hartman <gregkh@suse.de>
    ---
    fs/ext4/balloc.c | 8 +++++++-
    1 file changed, 7 insertions(+), 1 deletion(-)

    --- a/fs/ext4/balloc.c
    +++ b/fs/ext4/balloc.c
    @@ -761,7 +761,13 @@ static unsigned long ext4_bg_num_gdb_met
    static unsigned long ext4_bg_num_gdb_nometa(struct super_block *sb,
    ext4_group_t group)
    {
    - return ext4_bg_has_super(sb, group) ? EXT4_SB(sb)->s_gdb_count : 0;
    + if (!ext4_bg_has_super(sb, group))
    + return 0;
    +
    + if (EXT4_HAS_INCOMPAT_FEATURE(sb,EXT4_FEATURE_INCOMPAT_META_BG))
    + return le32_to_cpu(EXT4_SB(sb)->s_es->s_first_meta_bg);
    + else
    + return EXT4_SB(sb)->s_gdb_count;
    }

    /**



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