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#include <linux/config.h>
#include <linux/version.h>
#include <linux/mm.h>
#include <linux/module.h>
#include <linux/sched.h>
#include <linux/slab.h>
#include <xen/platform-compat.h>
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,7)
static int system_state = 1;
EXPORT_SYMBOL(system_state);
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,8)
size_t strcspn(const char *s, const char *reject)
{
const char *p;
const char *r;
size_t count = 0;
for (p = s; *p != '\0'; ++p) {
for (r = reject; *r != '\0'; ++r) {
if (*p == *r)
return count;
}
++count;
}
return count;
}
EXPORT_SYMBOL(strcspn);
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10)
/*
* Map a vmalloc()-space virtual address to the physical page frame number.
*/
unsigned long vmalloc_to_pfn(void * vmalloc_addr)
{
return page_to_pfn(vmalloc_to_page(vmalloc_addr));
}
EXPORT_SYMBOL(vmalloc_to_pfn);
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,11)
unsigned long wait_for_completion_timeout(struct completion *x, unsigned long timeout)
{
might_sleep();
spin_lock_irq(&x->wait.lock);
if (!x->done) {
DECLARE_WAITQUEUE(wait, current);
wait.flags |= WQ_FLAG_EXCLUSIVE;
__add_wait_queue_tail(&x->wait, &wait);
do {
__set_current_state(TASK_UNINTERRUPTIBLE);
spin_unlock_irq(&x->wait.lock);
timeout = schedule_timeout(timeout);
spin_lock_irq(&x->wait.lock);
if (!timeout) {
__remove_wait_queue(&x->wait, &wait);
goto out;
}
} while (!x->done);
__remove_wait_queue(&x->wait, &wait);
}
x->done--;
out:
spin_unlock_irq(&x->wait.lock);
return timeout;
}
EXPORT_SYMBOL(wait_for_completion_timeout);
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,12)
/*
fake do_exit using complete_and_exit
*/
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,10)
asmlinkage NORET_TYPE void do_exit(long code)
#else
fastcall NORET_TYPE void do_exit(long code)
#endif
{
complete_and_exit(NULL, code);
}
EXPORT_SYMBOL_GPL(do_exit);
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,14)
signed long schedule_timeout_interruptible(signed long timeout)
{
__set_current_state(TASK_INTERRUPTIBLE);
return schedule_timeout(timeout);
}
EXPORT_SYMBOL(schedule_timeout_interruptible);
#endif
#if LINUX_VERSION_CODE < KERNEL_VERSION(2,6,14)
/**
* kzalloc - allocate memory. The memory is set to zero.
* @size: how many bytes of memory are required.
* @flags: the type of memory to allocate.
*/
void *kzalloc(size_t size, int flags)
{
void *ret = kmalloc(size, flags);
if (ret)
memset(ret, 0, size);
return ret;
}
EXPORT_SYMBOL(kzalloc);
#endif
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