xfs: remove unused m_dmevmask from xfs_mount struct

The dmevmask structure member is a dmapi leftover; it's
set here and there but never actually used.  Remove it.

Signed-off-by: Eric Sandeen <sandeen@redhat.com>
Reviewed-by: Bill O'Donnell <billodo@redhat.com>
Reviewed-by: Darrick J. Wong <darrick.wong@oracle.com>
Signed-off-by: Darrick J. Wong <darrick.wong@oracle.com>

fs/xfs/xfs_log_recover.c

@@ -5127,16 +5127,9 @@ xlog_recover_process_iunlinks(
 	xfs_agino_t	agino;
 	int		bucket;
 	int		error;
-	uint		mp_dmevmask;
 
 	mp = log->l_mp;
 
-	/*
-	 * Prevent any DMAPI event from being sent while in this function.
-	 */
-	mp_dmevmask = mp->m_dmevmask;
-	mp->m_dmevmask = 0;
-
 	for (agno = 0; agno < mp->m_sb.sb_agcount; agno++) {
 		/*
 		 * Find the agi for this ag.
@@ -5172,8 +5165,6 @@ xlog_recover_process_iunlinks(
 		}
 		xfs_buf_rele(agibp);
 	}
-
-	mp->m_dmevmask = mp_dmevmask;
 }
 
 STATIC int

fs/xfs/xfs_mount.c

@@ -803,8 +803,6 @@ xfs_mountfs(
 		 get_unaligned_be16(&sbp->sb_uuid.b[4]);
 	mp->m_fixedfsid[1] = get_unaligned_be32(&sbp->sb_uuid.b[0]);
 
-	mp->m_dmevmask = 0;	/* not persistent; set after each mount */
-
 	error = xfs_da_mount(mp);
 	if (error) {
 		xfs_warn(mp, "Failed dir/attr init: %d", error);

fs/xfs/xfs_mount.h

@@ -138,7 +138,6 @@ typedef struct xfs_mount {
 	spinlock_t		m_perag_lock;	/* lock for m_perag_tree */
 	struct mutex		m_growlock;	/* growfs mutex */
 	int			m_fixedfsid[2];	/* unchanged for life of FS */
-	uint			m_dmevmask;	/* DMI events for this FS */
 	uint64_t		m_flags;	/* global mount flags */
 	bool			m_inotbt_nores; /* no per-AG finobt resv. */
 	int			m_ialloc_inos;	/* inodes in inode allocation */