staging/lustre/ldlm: Reinstate ldlm_enqueue_pack()

The function becomes used again with the next patch, so bring it back
from dead, only this time make it static.

Reverts: bf2a0333 ("staging/lustre/ldlm: Remove unused ldlm_enqueue_pack()")
Signed-off-by: Oleg Drokin <green@linuxhacker.ru>
Reviewed-by: James Simmons <jsimmons@infradead.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>

drivers/staging/lustre/lustre/ldlm/ldlm_request.c

@@ -657,6 +657,27 @@ int ldlm_prep_enqueue_req(struct obd_export *exp, struct ptlrpc_request *req,
 }
 EXPORT_SYMBOL(ldlm_prep_enqueue_req);
 
+static struct ptlrpc_request *ldlm_enqueue_pack(struct obd_export *exp,
+						int lvb_len)
+{
+	struct ptlrpc_request *req;
+	int rc;
+
+	req = ptlrpc_request_alloc(class_exp2cliimp(exp), &RQF_LDLM_ENQUEUE);
+	if (!req)
+		return ERR_PTR(-ENOMEM);
+
+	rc = ldlm_prep_enqueue_req(exp, req, NULL, 0);
+	if (rc) {
+		ptlrpc_request_free(req);
+		return ERR_PTR(rc);
+	}
+
+	req_capsule_set_size(&req->rq_pill, &RMF_DLM_LVB, RCL_SERVER, lvb_len);
+	ptlrpc_request_set_replen(req);
+	return req;
+}
+
 /**
  * Client-side lock enqueue.
  *