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      1 /*	$NetBSD: uvm_swapstub.c,v 1.10 2026/03/23 23:44:12 yamt Exp $	*/
      2 
      3 /*-
      4  * Copyright (c)2005 YAMAMOTO Takashi,
      5  * All rights reserved.
      6  *
      7  * Redistribution and use in source and binary forms, with or without
      8  * modification, are permitted provided that the following conditions
      9  * are met:
     10  * 1. Redistributions of source code must retain the above copyright
     11  *    notice, this list of conditions and the following disclaimer.
     12  * 2. Redistributions in binary form must reproduce the above copyright
     13  *    notice, this list of conditions and the following disclaimer in the
     14  *    documentation and/or other materials provided with the distribution.
     15  *
     16  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
     17  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
     18  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
     19  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
     20  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
     21  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
     22  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
     23  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
     24  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
     25  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
     26  * SUCH DAMAGE.
     27  */
     28 
     29 /*
     30  * Dummy routines used when "options VMSWAP" is not configured.
     31  */
     32 
     33 #include <sys/cdefs.h>
     34 __KERNEL_RCSID(0, "$NetBSD: uvm_swapstub.c,v 1.10 2026/03/23 23:44:12 yamt Exp $");
     35 
     36 #include <sys/param.h>
     37 #include <sys/systm.h>
     38 #include <sys/mount.h>
     39 #include <sys/syscallargs.h>
     40 
     41 #include <uvm/uvm.h>
     42 
     43 int (*uvm_swap_stats50)(const struct sys_swapctl_args *, register_t *) =
     44     (void *)enosys;
     45 int (*uvm_swap_stats110)(const struct sys_swapctl_args *, register_t *) =
     46     (void *)enosys;
     47 
     48 void
     49 uvm_swap_init(void)
     50 {
     51 
     52 	/* nothing */
     53 }
     54 
     55 int
     56 sys_swapctl(struct lwp *l, const struct sys_swapctl_args *v, register_t *retval)
     57 {
     58 
     59 	return ENOSYS;
     60 }
     61 
     62 void
     63 uvm_swap_shutdown(struct lwp *l)
     64 {
     65 
     66 	/* nothing */
     67 }
     68