1 | /* $NetBSD: shrinker.h,v 1.3 2014/07/16 20:56:25 riastradh Exp $ */ |
2 | |
3 | /*- |
4 | * Copyright (c) 2013 The NetBSD Foundation, Inc. |
5 | * All rights reserved. |
6 | * |
7 | * This code is derived from software contributed to The NetBSD Foundation |
8 | * by Taylor R. Campbell. |
9 | * |
10 | * Redistribution and use in source and binary forms, with or without |
11 | * modification, are permitted provided that the following conditions |
12 | * are met: |
13 | * 1. Redistributions of source code must retain the above copyright |
14 | * notice, this list of conditions and the following disclaimer. |
15 | * 2. Redistributions in binary form must reproduce the above copyright |
16 | * notice, this list of conditions and the following disclaimer in the |
17 | * documentation and/or other materials provided with the distribution. |
18 | * |
19 | * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS |
20 | * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED |
21 | * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR |
22 | * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS |
23 | * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR |
24 | * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF |
25 | * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS |
26 | * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN |
27 | * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
28 | * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE |
29 | * POSSIBILITY OF SUCH DAMAGE. |
30 | */ |
31 | |
32 | #ifndef _LINUX_SHRINKER_H_ |
33 | #define _LINUX_SHRINKER_H_ |
34 | |
35 | struct shrink_control { |
36 | unsigned long nr_to_scan; |
37 | }; |
38 | |
39 | struct shrinker { |
40 | int (*shrink)(struct shrinker *, struct shrink_control *); |
41 | unsigned long (*count_objects)(struct shrinker *, |
42 | struct shrink_control *); |
43 | unsigned long (*scan_objects)(struct shrinker *, |
44 | struct shrink_control *); |
45 | int seeks; |
46 | }; |
47 | |
48 | #define DEFAULT_SEEKS 2 /* XXX cargo-culted from Linux */ |
49 | |
50 | static inline void |
51 | register_shrinker(struct shrinker *shrinker __unused) |
52 | { |
53 | } |
54 | |
55 | static inline void |
56 | unregister_shrinker(struct shrinker *shrinker __unused) |
57 | { |
58 | } |
59 | |
60 | #endif /* _LINUX_SHRINKER_H_ */ |
61 | |