xfs: calculate xfs_qm_write_sb_changes() space log reservation at mount time

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@oracle.com>
CC: Dave Chinner <david@fromorbit.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

1 files changed, 3 insertions, 4 deletions

diff --git a/fs/xfs/xfs_qm.c b/fs/xfs/xfs_qm.c
index 60eff4763156..e5b5cf973781 100644
--- a/fs/xfs/xfs_qm.c
+++ b/fs/xfs/xfs_qm.c
@@ -1584,10 +1584,9 @@ 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;
         }