dlm: Make dismatch error message more clear

This change will try to make this error message more clear,
since the upper applications (e.g. ocfs2) invoke dlm_new_lockspace
to create a new lockspace with passing a cluster name. Sometimes,
dlm_new_lockspace return failure while two cluster names dismatch,
the user is a little confused since this line error message is not
enough obvious.
Signed-off-by: Gang He <ghe@suse.com>
Signed-off-by: David Teigland <teigland@redhat.com>

fs/dlm/lockspace.c

@@ -455,7 +455,8 @@ static int new_lockspace(const char *name, const char *cluster,
 
 	if (dlm_config.ci_recover_callbacks && cluster &&
 	    strncmp(cluster, dlm_config.ci_cluster_name, DLM_LOCKSPACE_LEN)) {
-		log_print("dlm cluster name %s mismatch %s",
+		log_print("dlm cluster name '%s' does not match "
+			  "the application cluster name '%s'",
 			  dlm_config.ci_cluster_name, cluster);
 		error = -EBADR;
 		goto out;