[PATCH v4 04/13] xfs: calculate xfs_qm_write_sb_changes() space log reservation at mount time

[Jeff Liu <jeff.liu@xxxxxxxxxx>]

For the transaction that write the incore superblock changes of quota flags
to disk, it would reserve the same log space to clear/reset quota flags
transaction, hence we can use XFS_TRANS_SBCHANGE_LOG_RES() for it as well.

Signed-off-by: Jie Liu <jeff.liu@xxxxxxxxxx>
CC: Dave Chinner <david@xxxxxxxxxxxxx>
Reviewed-by: Mark Tinguely <tinguely@xxxxxxx>
---
 fs/xfs/xfs_qm.c |    7 +++----
 1 file changed, 3 insertions(+), 4 deletions(-)

diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 2e86fa0..5745189 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -1582,10 +1582,9 @@ xfs_qm_write_sb_changes(
        int             error;
 
        tp = xfs_trans_alloc(mp, XFS_TRANS_QM_SBCHANGE);
-       if ((error = xfs_trans_reserve(tp, 0,
-                                     mp->m_sb.sb_sectsize + 128, 0,
-                                     0,
-                                     XFS_DEFAULT_LOG_COUNT))) {
+       error = xfs_trans_reserve(tp, 0, XFS_QM_SBCHANGE_LOG_RES(mp),
+                                 0, 0, XFS_DEFAULT_LOG_COUNT);
+       if (error) {
                xfs_trans_cancel(tp, 0);
                return error;
        }
-- 
1.7.9.5