1 /*- 2 * Copyright (c) 2018 Intel Corporation 3 * 4 * Redistribution and use in source and binary forms, with or without 5 * modification, are permitted provided that the following conditions are 6 * met: 7 * 1. Redistributions of source code must retain the above copyright 8 * notice, this list of conditions and the following disclaimer. 9 * 2. Redistributions in binary form must reproduce the above copyright 10 * notice, this list of conditions and the following disclaimer in 11 * the documentation and/or other materials provided with the 12 * distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD$ 27 */ 28 29 #ifndef _LINUXKPI_LINUX_SWAP_H_ 30 #define _LINUXKPI_LINUX_SWAP_H_ 31 32 #include <sys/param.h> 33 #include <sys/domainset.h> 34 #include <sys/queue.h> 35 #include <sys/proc.h> 36 #include <sys/pcpu.h> 37 38 #include <vm/vm.h> 39 #include <vm/swap_pager.h> 40 #include <vm/vm_pageout.h> 41 42 static inline long 43 get_nr_swap_pages(void) 44 { 45 int i, j; 46 47 /* NB: This could be done cheaply by obtaining swap_total directly */ 48 swap_pager_status(&i, &j); 49 return i - j; 50 } 51 52 static inline int 53 current_is_kswapd(void) 54 { 55 56 return (curproc == pageproc); 57 } 58 59 #endif 60