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1 | #ifndef _LTTNG_WRAPPER_PAGE_ALLOC_H |
2 | #define _LTTNG_WRAPPER_PAGE_ALLOC_H | |
3 | ||
4 | /* | |
5 | * wrapper/page_alloc.h | |
6 | * | |
7 | * wrapper around get_pfnblock_flags_mask. Using KALLSYMS to get its address | |
8 | * when available, else we need to have a kernel that exports this function to | |
9 | * GPL modules. | |
10 | * | |
11 | * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
12 | * | |
13 | * This library is free software; you can redistribute it and/or | |
14 | * modify it under the terms of the GNU Lesser General Public | |
15 | * License as published by the Free Software Foundation; only | |
16 | * version 2.1 of the License. | |
17 | * | |
18 | * This library is distributed in the hope that it will be useful, | |
19 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
20 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
21 | * Lesser General Public License for more details. | |
22 | * | |
23 | * You should have received a copy of the GNU Lesser General Public | |
24 | * License along with this library; if not, write to the Free Software | |
25 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
26 | */ | |
27 | ||
28 | #include "../lttng-kernel-version.h" | |
29 | ||
30 | /* | |
31 | * We need to redefine get_pfnblock_flags_mask to our wrapper, because | |
32 | * the get_pageblock_migratetype() macro uses it. | |
33 | */ | |
34 | #if defined(CONFIG_KALLSYMS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2)) | |
35 | ||
36 | #define get_pfnblock_flags_mask wrapper_get_pfnblock_flags_mask | |
37 | ||
38 | #include <linux/mm_types.h> | |
39 | ||
40 | int wrapper_get_pfnblock_flags_mask_init(void); | |
41 | ||
42 | #else /* #if defined(CONFIG_KALLSYMS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2)) */ | |
43 | ||
44 | #include <linux/mm_types.h> | |
45 | ||
46 | static inline | |
47 | int wrapper_get_pfnblock_flags_mask_init(void) | |
48 | { | |
49 | return 0; | |
50 | } | |
51 | ||
52 | #endif /* else #if defined(CONFIG_KALLSYMS) && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2)) */ | |
53 | ||
54 | #endif /* _LTTNG_WRAPPER_PAGE_ALLOC_H */ |