The journal blocks of external journal device should not
be counted as overhead.

Signed-off-by: Chin-Tsung Cheng <chintz...@gmail.com>
---
 fs/ext4/super.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/fs/ext4/super.c b/fs/ext4/super.c
index 32b43ad..a80b122 100644
--- a/fs/ext4/super.c
+++ b/fs/ext4/super.c
@@ -3316,8 +3316,8 @@ int ext4_calculate_overhead(struct super_block *sb)
                        memset(buf, 0, PAGE_SIZE);
                cond_resched();
        }
-       /* Add the journal blocks as well */
-       if (sbi->s_journal)
+       /* Add the internal journal blocks as well */
+       if (sbi->s_journal && !sbi->journal_bdev)
                overhead += EXT4_NUM_B2C(sbi, sbi->s_journal->j_maxlen);
 
        sbi->s_overhead = overhead;
-- 
1.9.3

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