dlm: no need to check return value of debugfs_create functions

When calling debugfs functions, there is no need to ever check the
return value.  The function can work or not, but the code logic should
never do something different based on this.
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: David Teigland <teigland@redhat.com>

fs/dlm/debug_fs.c

@@ -737,7 +737,7 @@ void dlm_delete_debug_file(struct dlm_ls *ls)
 	debugfs_remove(ls->ls_debug_toss_dentry);
 }
 
-int dlm_create_debug_file(struct dlm_ls *ls)
+void dlm_create_debug_file(struct dlm_ls *ls)
 {
 	char name[DLM_LOCKSPACE_LEN + 8];
 
@@ -748,8 +748,6 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 						      dlm_root,
 						      ls,
 						      &format1_fops);
-	if (!ls->ls_debug_rsb_dentry)
-		goto fail;
 
 	/* format 2 */
 
@@ -761,8 +759,6 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 							dlm_root,
 							ls,
 							&format2_fops);
-	if (!ls->ls_debug_locks_dentry)
-		goto fail;
 
 	/* format 3 */
 
@@ -774,8 +770,6 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 						      dlm_root,
 						      ls,
 						      &format3_fops);
-	if (!ls->ls_debug_all_dentry)
-		goto fail;
 
 	/* format 4 */
 
@@ -787,8 +781,6 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 						       dlm_root,
 						       ls,
 						       &format4_fops);
-	if (!ls->ls_debug_toss_dentry)
-		goto fail;
 
 	memset(name, 0, sizeof(name));
 	snprintf(name, DLM_LOCKSPACE_LEN + 8, "%s_waiters", ls->ls_name);
@@ -798,21 +790,12 @@ int dlm_create_debug_file(struct dlm_ls *ls)
 							  dlm_root,
 							  ls,
 							  &waiters_fops);
-	if (!ls->ls_debug_waiters_dentry)
-		goto fail;
-
-	return 0;
-
- fail:
-	dlm_delete_debug_file(ls);
-	return -ENOMEM;
 }
 
-int __init dlm_register_debugfs(void)
+void __init dlm_register_debugfs(void)
 {
 	mutex_init(&debug_buf_lock);
 	dlm_root = debugfs_create_dir("dlm", NULL);
-	return dlm_root ? 0 : -ENOMEM;
 }
 
 void dlm_unregister_debugfs(void)

fs/dlm/dlm_internal.h

@@ -719,14 +719,14 @@ int dlm_plock_init(void);
 void dlm_plock_exit(void);
 
 #ifdef CONFIG_DLM_DEBUG
-int dlm_register_debugfs(void);
+void dlm_register_debugfs(void);
 void dlm_unregister_debugfs(void);
-int dlm_create_debug_file(struct dlm_ls *ls);
+void dlm_create_debug_file(struct dlm_ls *ls);
 void dlm_delete_debug_file(struct dlm_ls *ls);
 #else
-static inline int dlm_register_debugfs(void) { return 0; }
+static inline void dlm_register_debugfs(void) { }
 static inline void dlm_unregister_debugfs(void) { }
-static inline int dlm_create_debug_file(struct dlm_ls *ls) { return 0; }
+static inline void dlm_create_debug_file(struct dlm_ls *ls) { }
 static inline void dlm_delete_debug_file(struct dlm_ls *ls) { }
 #endif
 

fs/dlm/main.c

@@ -35,9 +35,7 @@ static int __init init_dlm(void)
 	if (error)
 		goto out_lockspace;
 
-	error = dlm_register_debugfs();
-	if (error)
-		goto out_config;
+	dlm_register_debugfs();
 
 	error = dlm_user_init();
 	if (error)
@@ -61,7 +59,6 @@ static int __init init_dlm(void)
 	dlm_user_exit();
  out_debug:
 	dlm_unregister_debugfs();
- out_config:
 	dlm_config_exit();
  out_lockspace:
 	dlm_lockspace_exit();