diff --git a/fs/dlm/debug_fs.c b/fs/dlm/debug_fs.c
index fc44ab6657ca..c93359ceaae6 100644
--- a/fs/dlm/debug_fs.c
+++ b/fs/dlm/debug_fs.c
@@ -987,7 +987,7 @@ void dlm_create_debug_file(struct dlm_ls *ls)
 	/* format 2 */
 
 	memset(name, 0, sizeof(name));
-	snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_locks", ls->ls_name);
+	snprintf(name, sizeof(name), "%s_locks", ls->ls_name);
 
 	ls->ls_debug_locks_dentry = debugfs_create_file(name,
 							0644,
@@ -998,7 +998,7 @@ void dlm_create_debug_file(struct dlm_ls *ls)
 	/* format 3 */
 
 	memset(name, 0, sizeof(name));
-	snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_all", ls->ls_name);
+	snprintf(name, sizeof(name), "%s_all", ls->ls_name);
 
 	ls->ls_debug_all_dentry = debugfs_create_file(name,
 						      S_IFREG | S_IRUGO,
@@ -1009,7 +1009,7 @@ void dlm_create_debug_file(struct dlm_ls *ls)
 	/* format 4 */
 
 	memset(name, 0, sizeof(name));
-	snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_toss", ls->ls_name);
+	snprintf(name, sizeof(name), "%s_toss", ls->ls_name);
 
 	ls->ls_debug_toss_dentry = debugfs_create_file(name,
 						       S_IFREG | S_IRUGO,
@@ -1018,7 +1018,7 @@ void dlm_create_debug_file(struct dlm_ls *ls)
 						       &format4_fops);
 
 	memset(name, 0, sizeof(name));
-	snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_waiters", ls->ls_name);
+	snprintf(name, sizeof(name), "%s_waiters", ls->ls_name);
 
 	ls->ls_debug_waiters_dentry = debugfs_create_file(name,
 							  0644,
@@ -1029,7 +1029,7 @@ void dlm_create_debug_file(struct dlm_ls *ls)
 	/* format 5 */
 
 	memset(name, 0, sizeof(name));
-	snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_queued_asts", ls->ls_name);
+	snprintf(name, sizeof(name), "%s_queued_asts", ls->ls_name);
 
 	ls->ls_debug_queued_asts_dentry = debugfs_create_file(name,
 							      0644,