/**
  * LDLM non-error return states
  */
-typedef enum {
+enum ldlm_error {
        ELDLM_OK = 0,
 
        ELDLM_LOCK_CHANGED = 300,
 
        ELDLM_NAMESPACE_EXISTS = 400,
        ELDLM_BAD_NAMESPACE    = 401
-} ldlm_error_t;
+};
 
 /**
  * LDLM namespace type.
 } while (0)
 
 typedef int (*ldlm_processing_policy)(struct ldlm_lock *lock, __u64 *flags,
-                                     int first_enq, ldlm_error_t *err,
+                                     int first_enq, enum ldlm_error *err,
                                      struct list_head *work_list);
 
 /**
        return 0;
 }
 
-int ldlm_error2errno(ldlm_error_t error);
+int ldlm_error2errno(enum ldlm_error error);
 
 #if LUSTRE_TRACKS_LOCK_EXP_REFS
 void ldlm_dump_export_locks(struct obd_export *exp);
 
  *     would be collected and ASTs sent.
  */
 static int ldlm_process_flock_lock(struct ldlm_lock *req, __u64 *flags,
-                                  int first_enq, ldlm_error_t *err,
+                                  int first_enq, enum ldlm_error *err,
                                   struct list_head *work_list)
 {
        struct ldlm_resource *res = req->l_resource;
        struct obd_import             *imp = NULL;
        struct ldlm_flock_wait_data     fwd;
        struct l_wait_info            lwi;
-       ldlm_error_t                err;
+       enum ldlm_error             err;
        int                          rc = 0;
 
        CDEBUG(D_DLMTRACE, "flags: 0x%llx data: %p getlk: %p\n",
 
                 enum ldlm_type type, enum ldlm_mode mode,
                 const struct ldlm_callback_suite *cbs,
                 void *data, __u32 lvb_len, enum lvb_type lvb_type);
-ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **,
-                              void *cookie, __u64 *flags);
+enum ldlm_error ldlm_lock_enqueue(struct ldlm_namespace *, struct ldlm_lock **,
+                                 void *cookie, __u64 *flags);
 void ldlm_lock_addref_internal(struct ldlm_lock *, __u32 mode);
 void ldlm_lock_addref_internal_nolock(struct ldlm_lock *, __u32 mode);
 void ldlm_lock_decref_internal(struct ldlm_lock *, __u32 mode);
 
  * Rather arbitrary mapping from LDLM error codes to errno values. This should
  * not escape to the user level.
  */
-int ldlm_error2errno(ldlm_error_t error)
+int ldlm_error2errno(enum ldlm_error error)
 {
        int result;
 
                break;
        default:
                if (((int)error) < 0)  /* cast to signed type */
-                       result = error; /* as ldlm_error_t can be unsigned */
+                       result = error; /* as enum ldlm_error can be unsigned */
                else {
                        CERROR("Invalid DLM result code: %d\n", error);
                        result = -EPROTO;
 
  * Does not block. As a result of enqueue the lock would be put
  * into granted or waiting list.
  */
-ldlm_error_t ldlm_lock_enqueue(struct ldlm_namespace *ns,
-                              struct ldlm_lock **lockp,
-                              void *cookie, __u64 *flags)
+enum ldlm_error ldlm_lock_enqueue(struct ldlm_namespace *ns,
+                                 struct ldlm_lock **lockp,
+                                 void *cookie, __u64 *flags)
 {
        struct ldlm_lock *lock = *lockp;
        struct ldlm_resource *res = lock->l_resource;