projects / lttng-modules.git / blame
| Commit | Line | Data |
|---|---|---|
| 40d6e366 MD |
1 | #ifndef _LTTNG_WRAPPER_COMPILER_H |
| 2 | #define _LTTNG_WRAPPER_COMPILER_H | |
| 3 | ||
| 4 | /* | |
| 5 | * wrapper/compiler.h | |
| 6 | * | |
| 7 | * Copyright (C) 2013 Mathieu Desnoyers <mathieu.desnoyers@efficios.com> | |
| 8 | * | |
| 9 | * This library is free software; you can redistribute it and/or | |
| 10 | * modify it under the terms of the GNU Lesser General Public | |
| 11 | * License as published by the Free Software Foundation; only | |
| 12 | * version 2.1 of the License. | |
| 13 | * | |
| 14 | * This library is distributed in the hope that it will be useful, | |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU | |
| 17 | * Lesser General Public License for more details. | |
| 18 | * | |
| 19 | * You should have received a copy of the GNU Lesser General Public | |
| 20 | * License along with this library; if not, write to the Free Software | |
| 21 | * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA | |
| 22 | */ | |
| 23 | ||
| 24 | #include <linux/compiler.h> | |
| 25 | ||
| 26 | /* | |
| 27 | * Don't allow compiling with buggy compiler. | |
| 28 | */ | |
| 29 | ||
| cf262f57 MD |
30 | #ifdef GCC_VERSION |
| 31 | ||
| 40d6e366 MD |
32 | /* |
| 33 | * http://gcc.gnu.org/bugzilla/show_bug.cgi?id=58854 | |
| 34 | */ | |
| cf262f57 MD |
35 | # ifdef __ARMEL__ |
| 36 | # if GCC_VERSION >= 40800 && GCC_VERSION <= 40802 | |
| 37 | # error Your gcc version produces clobbered frame accesses | |
| 38 | # endif | |
| 40d6e366 MD |
39 | # endif |
| 40 | #endif | |
| 41 | ||
| a8f2d0c7 MJ |
42 | /* |
| 43 | * READ/WRITE_ONCE were introduced in kernel 3.19 and ACCESS_ONCE | |
| 44 | * was removed in 4.15. Prefer READ/WRITE but fallback to ACCESS | |
| 45 | * when they are not available. | |
| 46 | */ | |
| 47 | #ifndef READ_ONCE | |
| 48 | # define READ_ONCE(x) ACCESS_ONCE(x) | |
| 49 | #endif | |
| 50 | ||
| 51 | #ifndef WRITE_ONCE | |
| 52 | # define WRITE_ONCE(x, val) ({ ACCESS_ONCE(x) = val; }) | |
| 53 | #endif | |
| 54 | ||
| 40d6e366 | 55 | #endif /* _LTTNG_WRAPPER_COMPILER_H */ |