| 1 | /* SPDX-License-Identifier: (GPL-2.0-only or LGPL-2.1-only) |
| 2 | * |
| 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> |
| 10 | */ |
| 11 | |
| 12 | #ifndef _LTTNG_WRAPPER_PAGE_ALLOC_H |
| 13 | #define _LTTNG_WRAPPER_PAGE_ALLOC_H |
| 14 | |
| 15 | #include <linux/mm_types.h> |
| 16 | |
| 17 | /* |
| 18 | * We need to redefine get_pfnblock_flags_mask to our wrapper, because |
| 19 | * the get_pageblock_migratetype() macro uses it. |
| 20 | */ |
| 21 | #ifdef CONFIG_KALLSYMS |
| 22 | |
| 23 | #define get_pfnblock_flags_mask wrapper_get_pfnblock_flags_mask |
| 24 | |
| 25 | int wrapper_get_pfnblock_flags_mask_init(void); |
| 26 | |
| 27 | #else |
| 28 | |
| 29 | static inline |
| 30 | int wrapper_get_pfnblock_flags_mask_init(void) |
| 31 | { |
| 32 | return 0; |
| 33 | } |
| 34 | |
| 35 | #endif |
| 36 | |
| 37 | #endif /* _LTTNG_WRAPPER_PAGE_ALLOC_H */ |