| | 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) \ |
| | 35 | && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2) \ |
| | 36 | || LTTNG_KERNEL_RANGE(3,14,36, 3,15,0) \ |
| | 37 | || LTTNG_KERNEL_RANGE(3,18,10, 3,19,0) \ |
| | 38 | || LTTNG_DEBIAN_KERNEL_RANGE(3,16,7,9,0,0, 3,17,0,0,0,0) \ |
| | 39 | || LTTNG_UBUNTU_KERNEL_RANGE(3,16,7,34, 3,17,0,0))) |
| | 40 | |
| | 41 | #define get_pfnblock_flags_mask wrapper_get_pfnblock_flags_mask |
| | 42 | |
| | 43 | #include <linux/mm_types.h> |
| | 44 | |
| | 45 | int wrapper_get_pfnblock_flags_mask_init(void); |
| | 46 | |
| | 47 | #else |
| | 48 | |
| | 49 | #include <linux/mm_types.h> |
| | 50 | |
| | 51 | static inline |
| | 52 | int wrapper_get_pfnblock_flags_mask_init(void) |
| | 53 | { |
| | 54 | return 0; |
| | 55 | } |
| | 56 | |
| | 57 | #endif |
| | 58 | |
| | 59 | /* |
| | 60 | * For a specific range of Ubuntu 3.13 kernels, we need to redefine |
| | 61 | * get_pageblock_flags_mask to our wrapper, because the |
| | 62 | * get_pageblock_migratetype() macro uses it. This function has been |
| | 63 | * introduced into mainline within commit |
| | 64 | * e58469bafd0524e848c3733bc3918d854595e20f, but never actually showed |
| | 65 | * up in a stable kernel version, since it has been changed by commit |
| | 66 | * dc4b0caff24d9b2918e9f27bc65499ee63187eba. Since Ubuntu chose to only |
| | 67 | * backport the former commit but not the latter, we need to do a |
| | 68 | * special case to cover this. |
| | 69 | */ |
| | 70 | #if (defined(CONFIG_KALLSYMS) \ |
| | 71 | && LTTNG_UBUNTU_KERNEL_RANGE(3,13,11,50, 3,14,0,0)) |
| | 72 | |
| | 73 | #define get_pageblock_flags_mask wrapper_get_pageblock_flags_mask |
| | 74 | |
| | 75 | #include <linux/mm_types.h> |
| | 76 | |
| | 77 | int wrapper_get_pageblock_flags_mask_init(void); |
| | 78 | |
| | 79 | #else |
| | 80 | |
| | 81 | #include <linux/mm_types.h> |
| | 82 | |
| | 83 | static inline |
| | 84 | int wrapper_get_pageblock_flags_mask_init(void) |
| | 85 | { |
| | 86 | return 0; |
| | 87 | } |
| | 88 | |
| | 89 | #endif |
| | 90 | |
| | 91 | #endif /* _LTTNG_WRAPPER_PAGE_ALLOC_H */ |
projects / lttng-modules.git / blame_incremental