Mike Dodd | 8cfa702 | 2010-11-17 11:12:26 -0800 | [diff] [blame] | 1 | /** |
| 2 | * @file compat.h |
| 3 | * This file is intended to be up-to-date with the last linux version and |
| 4 | * provide work-arounds for missing features in previous kernel version |
| 5 | * |
| 6 | * @remark Copyright 2002 OProfile authors |
| 7 | * @remark Read the file COPYING |
| 8 | * |
| 9 | * @author John Levon |
| 10 | * @author Philippe Elie |
| 11 | */ |
| 12 | |
| 13 | |
| 14 | #ifndef COMPAT_H |
| 15 | #define COMPAT_H |
| 16 | |
| 17 | #include <linux/version.h> |
| 18 | #include <linux/module.h> |
| 19 | #ifdef HAVE_LINUX_SPINLOCK_HEADER |
| 20 | /* FIXME do we need this still ? */ |
| 21 | #include <linux/spinlock.h> |
| 22 | #endif |
| 23 | |
| 24 | #define V_BEFORE(a, b, c) (LINUX_VERSION_CODE < KERNEL_VERSION(a, b, c)) |
| 25 | #define V_AT_LEAST(a, b, c) (LINUX_VERSION_CODE >= KERNEL_VERSION(a, b, c)) |
| 26 | |
| 27 | #if V_BEFORE(2, 4, 0) |
| 28 | #include "compat22.h" |
| 29 | #else |
| 30 | #include "compat24.h" |
| 31 | #endif |
| 32 | |
| 33 | #include "op_cache.h" |
| 34 | |
| 35 | /* Things that cannot rely on a particular linux version or are needed between |
| 36 | * major release */ |
| 37 | |
| 38 | #ifndef BUG_ON |
| 39 | #define BUG_ON(p) do { if (p) BUG(); } while (0) |
| 40 | #endif |
| 41 | |
| 42 | #ifndef MODULE_LICENSE |
| 43 | #define MODULE_LICENSE(x) |
| 44 | #endif |
| 45 | |
| 46 | /* Compiler work-around */ |
| 47 | |
| 48 | /* branch prediction */ |
| 49 | #ifndef likely |
| 50 | #ifdef EXPECT_OK |
| 51 | #define likely(a) __builtin_expect((a), 1) |
| 52 | #else |
| 53 | #define likely(a) (a) |
| 54 | #endif |
| 55 | #endif |
| 56 | #ifndef unlikely |
| 57 | #ifdef EXPECT_OK |
| 58 | #define unlikely(a) __builtin_expect((a), 0) |
| 59 | #else |
| 60 | #define unlikely(a) (a) |
| 61 | #endif |
| 62 | #endif |
| 63 | |
| 64 | #ifndef CONFIG_X86_64 |
| 65 | #define VMALLOC_32(sz) vmalloc_32(sz) |
| 66 | #else /* CONFIG_X86_64 */ |
| 67 | #define VMALLOC_32(sz) vmalloc(sz) |
| 68 | #endif /* CONFIG_X86_64 */ |
| 69 | |
| 70 | #endif /* COMPAT_H */ |