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 */ 71