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7 * it under the terms of the GNU General Public License version 2 only,
8 * as published by the Free Software Foundation.
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11 * WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
13 * General Public License version 2 for more details (a copy is included
14 * in the LICENSE file that accompanied this code).
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17 * version 2 along with this program; If not, see
18 * http://www.gnu.org/licenses/gpl-2.0.html
23 * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved.
24 * Use is subject to license terms.
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29 * This file is part of Lustre, http://www.lustre.org/
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32 * libcfs/include/libcfs/linux/linux-mem.h
34 * Basic library routines.
37 #ifndef __LIBCFS_LINUX_CFS_MEM_H__
38 #define __LIBCFS_LINUX_CFS_MEM_H__
41 #include <linux/vmalloc.h>
42 #include <linux/pagemap.h>
43 #include <linux/slab.h>
45 # include <linux/mm_inline.h>
51 #ifdef HAVE_SHRINK_CONTROL
52 # define SHRINKER_ARGS(sc, nr_to_scan, gfp_mask) \
53 struct shrinker *shrinker, \
54 struct shrink_control *sc
55 # define shrink_param(sc, var) ((sc)->var)
57 struct shrink_control {
59 unsigned long nr_to_scan;
61 # ifdef HAVE_SHRINKER_WANT_SHRINK_PTR
62 # define SHRINKER_ARGS(sc, nr_to_scan, gfp_mask) \
63 struct shrinker *shrinker, \
64 int nr_to_scan, gfp_t gfp_mask
66 # define SHRINKER_ARGS(sc, nr_to_scan, gfp_mask) \
67 int nr_to_scan, gfp_t gfp_mask
69 /* avoid conflict with spl mm_compat.h */
70 # define HAVE_SHRINK_CONTROL_STRUCT 1
71 # define shrink_param(sc, var) (var)
74 #ifdef HAVE_SHRINKER_COUNT
76 unsigned long (*count)(struct shrinker *,
77 struct shrink_control *sc);
78 unsigned long (*scan)(struct shrinker *,
79 struct shrink_control *sc);
81 # define DEF_SHRINKER_VAR(name, shrink, count_obj, scan_obj) \
82 struct shrinker_var name = { .count = count_obj, .scan = scan_obj }
85 int (*shrink)(SHRINKER_ARGS(sc, nr_to_scan, gfp_mask));
87 # define DEF_SHRINKER_VAR(name, shrinker, count, scan) \
88 struct shrinker_var name = { .shrink = shrinker }
89 # define SHRINK_STOP (~0UL)
93 struct shrinker *set_shrinker(int seek, struct shrinker_var *var)
97 s = kzalloc(sizeof(*s), GFP_KERNEL);
101 #ifdef HAVE_SHRINKER_COUNT
102 s->count_objects = var->count;
103 s->scan_objects = var->scan;
105 s->shrink = var->shrink;
109 register_shrinker(s);
115 void remove_shrinker(struct shrinker *shrinker)
117 if (shrinker == NULL)
120 unregister_shrinker(shrinker);
124 #endif /* __LINUX_CFS_MEM_H__ */