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/*
* Compatibility header for building as an external module.
*/
/*
* Avoid picking up the kernel's kvm.h in case we have a newer one.
*/
#include <linux/compiler.h>
#include <linux/version.h>
#include "include/linux/kvm.h"
#include <linux/cpu.h>
/*
* 2.6.16 does not have GFP_NOWAIT
*/
#include <linux/gfp.h>
#ifndef GFP_NOWAIT
#define GFP_NOWAIT (GFP_ATOMIC & ~__GFP_HIGH)
#endif
/*
* kvm profiling support needs 2.6.20
*/
#include <linux/profile.h>
#ifndef KVM_PROFILING
#define KVM_PROFILING 1234
#define prof_on 4321
#endif
/*
* smp_call_function_single() is not exported below 2.6.20
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,20)
#include <linux/spinlock.h>
#include <linux/smp.h>
static spinlock_t scfs_lock = SPIN_LOCK_UNLOCKED;
static int scfs_cpu;
static void (*scfs_func)(void *info);
static void scfs_thunk(void *info)
{
if (raw_smp_processor_id() == scfs_cpu)
scfs_func(info);
}
static inline int smp_call_function_single1(int cpu, void (*func)(void *info),
void *info, int nonatomic, int wait)
{
int r;
spin_lock(&scfs_lock);
scfs_cpu = cpu;
scfs_func = func;
r = smp_call_function(scfs_thunk, info, nonatomic, wait);
spin_unlock(&scfs_lock);
return r;
}
#define smp_call_function_single smp_call_function_single1
#endif
/*
* The cpu hotplug stubs are broken if !CONFIG_CPU_HOTPLUG
*/
#if LINUX_VERSION_CODE <= KERNEL_VERSION(2,6,15)
#define DEFINE_MUTEX(a) DECLARE_MUTEX(a)
#define mutex_lock_interruptible(a) down_interruptible(a)
#define mutex_unlock(a) up(a)
#define mutex_lock(a) down(a)
#define mutex_init(a) init_MUTEX(a)
#define mutex_trylock(a) down_trylock(a)
#define mutex semaphore
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,14)
#ifndef kzalloc
#define kzalloc(size,flags) \
({ \
void *__ret = kmalloc(size, flags); \
if (__ret)
memset(__ret, 0, size);
__ret;
})
#endif
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,21)
#ifndef CONFIG_HOTPLUG_CPU
#define register_cpu_notifier(nb) (0)
#endif
#endif
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