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d7e09d03 PT |
1 | /* |
2 | * GPL HEADER START | |
3 | * | |
4 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. | |
5 | * | |
6 | * This program is free software; you can redistribute it and/or modify | |
7 | * it under the terms of the GNU General Public License version 2 only, | |
8 | * as published by the Free Software Foundation. | |
9 | * | |
10 | * This program is distributed in the hope that it will be useful, but | |
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). | |
15 | * | |
16 | * You should have received a copy of the GNU General Public License | |
17 | * version 2 along with this program; If not, see | |
18 | * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf | |
19 | * | |
20 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, | |
21 | * CA 95054 USA or visit www.sun.com if you need additional information or | |
22 | * have any questions. | |
23 | * | |
24 | * GPL HEADER END | |
25 | */ | |
26 | /* | |
27 | * Copyright (c) 2008, 2010, Oracle and/or its affiliates. All rights reserved. | |
28 | * Use is subject to license terms. | |
29 | * | |
30 | * Copyright (c) 2011, 2012, Intel Corporation. | |
31 | */ | |
32 | /* | |
33 | * This file is part of Lustre, http://www.lustre.org/ | |
34 | * Lustre is a trademark of Sun Microsystems, Inc. | |
35 | * | |
36 | * libcfs/include/libcfs/linux/linux-mem.h | |
37 | * | |
38 | * Basic library routines. | |
39 | */ | |
40 | ||
41 | #ifndef __LIBCFS_LINUX_CFS_MEM_H__ | |
42 | #define __LIBCFS_LINUX_CFS_MEM_H__ | |
43 | ||
44 | #ifndef __LIBCFS_LIBCFS_H__ | |
45 | #error Do not #include this file directly. #include <linux/libcfs/libcfs.h> instead | |
46 | #endif | |
47 | ||
d7e09d03 PT |
48 | #include <linux/mm.h> |
49 | #include <linux/vmalloc.h> | |
50 | #include <linux/pagemap.h> | |
51 | #include <linux/slab.h> | |
52 | #include <linux/memcontrol.h> | |
53 | #include <linux/mm_inline.h> | |
54 | ||
5426ba66 LX |
55 | #ifndef HAVE_LIBCFS_CPT |
56 | /* Need this for cfs_cpt_table */ | |
86e5b63d | 57 | #include "../libcfs_cpu.h" |
5426ba66 LX |
58 | #endif |
59 | ||
09cbfeaf | 60 | #define CFS_PAGE_MASK (~((__u64)PAGE_SIZE-1)) |
d7e09d03 PT |
61 | #define page_index(p) ((p)->index) |
62 | ||
63 | #define memory_pressure_get() (current->flags & PF_MEMALLOC) | |
64 | #define memory_pressure_set() do { current->flags |= PF_MEMALLOC; } while (0) | |
65 | #define memory_pressure_clr() do { current->flags &= ~PF_MEMALLOC; } while (0) | |
66 | ||
67 | #if BITS_PER_LONG == 32 | |
68 | /* limit to lowmem on 32-bit systems */ | |
69 | #define NUM_CACHEPAGES \ | |
09cbfeaf | 70 | min(totalram_pages, 1UL << (30 - PAGE_SHIFT) * 3 / 4) |
d7e09d03 | 71 | #else |
4f6cc9ab | 72 | #define NUM_CACHEPAGES totalram_pages |
d7e09d03 PT |
73 | #endif |
74 | ||
d7e09d03 PT |
75 | #define DECL_MMSPACE mm_segment_t __oldfs |
76 | #define MMSPACE_OPEN \ | |
a393fd54 | 77 | do { __oldfs = get_fs(); set_fs(get_ds()); } while (0) |
d7e09d03 PT |
78 | #define MMSPACE_CLOSE set_fs(__oldfs) |
79 | ||
d7e09d03 | 80 | #endif /* __LINUX_CFS_MEM_H__ */ |