xfs: deprecate the nodelaylog mount option

Signed-off-by: Christoph Hellwig <[e-mail]>
Reviewed-by: Dave Chinner <[e-mail]>
Signed-off-by: Alex Elder <[e-mail]>

Documentation/feature-removal-schedule.txt

···
 	interface that was used by acer-wmi driver. It will replaced by
 	information log when acer-wmi initial.
 Who:    Lee, Chun-Yi <[e-mail]>
+
+----------------------------
+What:	The XFS nodelaylog mount option
+When:	3.3
+Why:	The delaylog mode that has been the default since 2.6.39 has proven
+	stable, and the old code is in the way of additional improvements in
+	the log code.
+Who:	Christoph Hellwig <[e-mail]>

fs/xfs/xfs_super.c

···
 			mp->m_flags |= XFS_MOUNT_DELAYLOG;
 		} else if (!strcmp(this_char, MNTOPT_NODELAYLOG)) {
 			mp->m_flags &= ~XFS_MOUNT_DELAYLOG;
+			xfs_warn(mp,
+	"nodelaylog is deprecated and will be removed in Linux 3.3");
 		} else if (!strcmp(this_char, MNTOPT_DISCARD)) {
 			mp->m_flags |= XFS_MOUNT_DISCARD;
 		} else if (!strcmp(this_char, MNTOPT_NODISCARD)) {