add a file which i forgot when reviving VMSWAP option.

sys/uvm/uvm_swapstub.c

@@ -0,0 +1,63 @@
+/*	$NetBSD: uvm_swapstub.c,v 1.3 2005/09/21 10:21:46 yamt Exp $	*/
+
+/*-
+ * Copyright (c)2005 YAMAMOTO Takashi,
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions
+ * are met:
+ * 1. Redistributions of source code must retain the above copyright
+ *    notice, this list of conditions and the following disclaimer.
+ * 2. Redistributions in binary form must reproduce the above copyright
+ *    notice, this list of conditions and the following disclaimer in the
+ *    documentation and/or other materials provided with the distribution.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
+ * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
+ * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
+ * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
+ * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
+ * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
+ * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
+ * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
+ * SUCH DAMAGE.
+ */
+
+/*
+ * dummy routines used when "options VMSWAP" is not configured.
+ */
+
+#include <sys/cdefs.h>
+__KERNEL_RCSID(0, "$NetBSD: uvm_swapstub.c,v 1.3 2005/09/21 10:21:46 yamt Exp $");
+
+#include <sys/param.h>
+#include <sys/systm.h>
+#include <sys/mount.h>
+#include <sys/sa.h>
+#include <sys/syscallargs.h>
+
+#include <uvm/uvm.h>
+
+void
+uvm_swap_init(void)
+{
+
+	/* nothing */
+}
+
+int
+sys_swapctl(struct lwp *l, void *v, register_t *retval)
+{
+
+	return ENOSYS;
+}
+
+void
+uvm_swap_stats(int cmd, struct swapent *sep, int sec, register_t *retval)
+{
+
+	*retval = 0;
+}