[XFS] Track external log/realtime device names for correct reporting in
/proc/mounts.

SGI-PV: 942984
SGI-Modid: xfs-linux:xfs-kern:23862a

Signed-off-by: Nathan Scott <nathans@sgi.com>
diff --git a/fs/xfs/xfs_log.c b/fs/xfs/xfs_log.c
index b9d3ad3..fcde2a2 100644
--- a/fs/xfs/xfs_log.c
+++ b/fs/xfs/xfs_log.c
@@ -483,7 +483,8 @@
 
 #if defined(DEBUG) || defined(XLOG_NOLOG)
 	if (!xlog_debug) {
-		cmn_err(CE_NOTE, "log dev: %s", XFS_BUFTARG_NAME(log_target));
+		cmn_err(CE_NOTE, "logdev: %s", mp->m_logname ?
+			mp->m_logname : "internal");
 		return 0;
 	}
 #endif