projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| b7cdc182 | 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 9f36eaed | 2 | * |
| 389d7070 MD |
3 | * wrapper/page_alloc.h |
| 4 | * | |
| 5 | * wrapper around get_pfnblock_flags_mask. Using KALLSYMS to get its address | |
| 6 | * when available, else we need to have a kernel that exports this function to | |
| 7 | * GPL modules. | |
| 8 | * | |
| 9 | * Copyright (C) 2015 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 389d7070 MD |
10 | */ |
| 11 | ||
| 9f36eaed MJ |
12 | #ifndef _LTTNG_WRAPPER_PAGE_ALLOC_H |
| 13 | #define _LTTNG_WRAPPER_PAGE_ALLOC_H | |
| 14 | ||
| 2df37e95 | 15 | #include <lttng/kernel-version.h> |
| 389d7070 MD |
16 | |
| 17 | /* | |
| 18 | * We need to redefine get_pfnblock_flags_mask to our wrapper, because | |
| 19 | * the get_pageblock_migratetype() macro uses it. | |
| 20 | */ | |
| ffc696db | 21 | #if (defined(CONFIG_KALLSYMS) \ |
| 36561775 MD |
22 | && (LINUX_VERSION_CODE >= KERNEL_VERSION(3,19,2) \ |
| 23 | || LTTNG_KERNEL_RANGE(3,14,36, 3,15,0) \ | |
| 24 | || LTTNG_KERNEL_RANGE(3,18,10, 3,19,0) \ | |
| 397c12b4 MD |
25 | || LTTNG_DEBIAN_KERNEL_RANGE(3,16,7,9,0,0, 3,17,0,0,0,0) \ |
| 26 | || LTTNG_UBUNTU_KERNEL_RANGE(3,16,7,34, 3,17,0,0))) | |
| 389d7070 MD |
27 | |
| 28 | #define get_pfnblock_flags_mask wrapper_get_pfnblock_flags_mask | |
| 29 | ||
| 30 | #include <linux/mm_types.h> | |
| 31 | ||
| 32 | int wrapper_get_pfnblock_flags_mask_init(void); | |
| 33 | ||
| 0e14d6e7 | 34 | #else |
| 389d7070 MD |
35 | |
| 36 | #include <linux/mm_types.h> | |
| 37 | ||
| 38 | static inline | |
| 39 | int wrapper_get_pfnblock_flags_mask_init(void) | |
| 40 | { | |
| 41 | return 0; | |
| 42 | } | |
| 43 | ||
| 0e14d6e7 MD |
44 | #endif |
| 45 | ||
| 46 | /* | |
| 47 | * For a specific range of Ubuntu 3.13 kernels, we need to redefine | |
| 48 | * get_pageblock_flags_mask to our wrapper, because the | |
| 49 | * get_pageblock_migratetype() macro uses it. This function has been | |
| 50 | * introduced into mainline within commit | |
| 51 | * e58469bafd0524e848c3733bc3918d854595e20f, but never actually showed | |
| 52 | * up in a stable kernel version, since it has been changed by commit | |
| 53 | * dc4b0caff24d9b2918e9f27bc65499ee63187eba. Since Ubuntu chose to only | |
| 54 | * backport the former commit but not the latter, we need to do a | |
| 55 | * special case to cover this. | |
| 56 | */ | |
| 57 | #if (defined(CONFIG_KALLSYMS) \ | |
| 58 | && LTTNG_UBUNTU_KERNEL_RANGE(3,13,11,50, 3,14,0,0)) | |
| 59 | ||
| 60 | #define get_pageblock_flags_mask wrapper_get_pageblock_flags_mask | |
| 61 | ||
| 62 | #include <linux/mm_types.h> | |
| 63 | ||
| 64 | int wrapper_get_pageblock_flags_mask_init(void); | |
| 65 | ||
| 66 | #else | |
| 67 | ||
| 68 | #include <linux/mm_types.h> | |
| 69 | ||
| 70 | static inline | |
| 71 | int wrapper_get_pageblock_flags_mask_init(void) | |
| 72 | { | |
| 73 | return 0; | |
| 74 | } | |
| 75 | ||
| 76 | #endif | |
| 389d7070 MD |
77 | |
| 78 | #endif /* _LTTNG_WRAPPER_PAGE_ALLOC_H */ |