xfs: Introduce tr_fsyncts to m_reservation

A preparation step.

For now fsync_ts transaction use the pre-calculated log reservation
size of tr_swrite.  This patch introduce a new item tr_fsyncts to
mp->m_reservations structure so that we can fetch the log
reservation value for it in a same manner to others.

Signed-off-by: Jie Liu <jeff.liu@oracle.com>
Signed-off-by: Dave Chinner <dchinner@redhat.com>
Reviewed-by: Mark Tinguely <tinguely@sgi.com>
Signed-off-by: Ben Myers <bpm@sgi.com>

diff --git a/fs/xfs/xfs_trans_resv.h b/fs/xfs/xfs_trans_resv.h
index 0aac1fa..326f17d 100644
--- a/fs/xfs/xfs_trans_resv.h
+++ b/fs/xfs/xfs_trans_resv.h
@@ -62,6 +62,7 @@
 	struct xfs_trans_res	tr_qm_quotaoff;	/* turn quota off */
 	struct xfs_trans_res	tr_qm_equotaoff;/* end of turn quota off */
 	struct xfs_trans_res	tr_sb;		/* modify superblock */
+	struct xfs_trans_res	tr_fsyncts;	/* update timestamps on fsync */
 };
 
 /*
@@ -109,7 +110,7 @@
  * Logging the inode timestamps on an fsync -- same as SWRITE
  * as long as SWRITE logs the entire inode core
  */
-#define XFS_FSYNC_TS_LOG_RES(mp) ((mp)->m_resv.tr_swrite.tr_logres)
+#define XFS_FSYNC_TS_LOG_RES(mp) ((mp)->m_resv.tr_fsyncts.tr_logres)
 #define XFS_WRITEID_LOG_RES(mp)	 ((mp)->m_resv.tr_swrite.tr_logres)
 #define XFS_ADDAFORK_LOG_RES(mp) ((mp)->m_resv.tr_addafork.tr_logres)
 #define XFS_ATTRSETM_LOG_RES(mp) ((mp)->m_resv.tr_attrsetm.tr_logres)