xfs: Make writeid transaction use tr_writeid

tr_writeid is defined at mp->m_resv structure, however, it does not
really being used when it should be..

This patch changes it to tr_writeid to fetch the correct log
reservation size.
Signed-off-by: NJie Liu <jeff.liu@oracle.com>
Signed-off-by: NDave Chinner <dchinner@redhat.com>
Reviewed-by: NMark Tinguely <tinguely@sgi.com>
Signed-off-by: NBen Myers <bpm@sgi.com>

fs/xfs/xfs_trans_resv.h

@@ -111,7 +111,7 @@ struct xfs_trans_resv {
  * as long as SWRITE logs the entire inode core
  */
 #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_WRITEID_LOG_RES(mp)	 ((mp)->m_resv.tr_writeid.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)
 #define XFS_ATTRINVAL_LOG_RES(mp) ((mp)->m_resv.tr_attrinval.tr_logres)