projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 66861b2e MD |
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 | ||
| 7d5f6cef | 42 | #else |
| 66861b2e MD |
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 | ||
| 7d5f6cef MD |
52 | #endif |
| 53 | ||
| 54 | /* | |
| 55 | * For a specific range of Ubuntu 3.13 kernels, we need to redefine | |
| 56 | * get_pageblock_flags_mask to our wrapper, because the | |
| 57 | * get_pageblock_migratetype() macro uses it. This function has been | |
| 58 | * introduced into mainline within commit | |
| 59 | * e58469bafd0524e848c3733bc3918d854595e20f, but never actually showed | |
| 60 | * up in a stable kernel version, since it has been changed by commit | |
| 61 | * dc4b0caff24d9b2918e9f27bc65499ee63187eba. Since Ubuntu chose to only | |
| 62 | * backport the former commit but not the latter, we need to do a | |
| 63 | * special case to cover this. | |
| 64 | */ | |
| 65 | #if (defined(CONFIG_KALLSYMS) \ | |
| 66 | && LTTNG_UBUNTU_KERNEL_RANGE(3,13,11,50, 3,14,0,0)) | |
| 67 | ||
| 68 | #define get_pageblock_flags_mask wrapper_get_pageblock_flags_mask | |
| 69 | ||
| 70 | #include <linux/mm_types.h> | |
| 71 | ||
| 72 | int wrapper_get_pageblock_flags_mask_init(void); | |
| 73 | ||
| 74 | #else | |
| 75 | ||
| 76 | #include <linux/mm_types.h> | |
| 77 | ||
| 78 | static inline | |
| 79 | int wrapper_get_pageblock_flags_mask_init(void) | |
| 80 | { | |
| 81 | return 0; | |
| 82 | } | |
| 83 | ||
| 84 | #endif | |
| 66861b2e MD |
85 | |
| 86 | #endif /* _LTTNG_WRAPPER_PAGE_ALLOC_H */ |