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#ifndef _SPL_VMSYSTM_H
#define _SPL_VMSYSTM_H
#include <linux/mm.h>
#include <sys/types.h>
#include <asm/uaccess.h>
extern vmem_t *zio_alloc_arena; /* arena for zio caches */
#define physmem num_physpages
#define ptob(pages) (pages * PAGE_SIZE)
#define membar_producer() smp_wmb()
#define xcopyin(from, to, size) copy_from_user(to, from, size)
#define xcopyout(from, to, size) copy_to_user(to, from, size)
static __inline__ int
copyin(const void *from, void *to, size_t len)
{
/* On error copyin routine returns -1 */
if (xcopyin(from, to, len))
return -1;
return 0;
}
static __inline__ int
copyout(const void *from, void *to, size_t len)
{
/* On error copyout routine returns -1 */
if (xcopyout(from, to, len))
return -1;
return 0;
}
static __inline__ int
copyinstr(const void *from, void *to, size_t len, size_t *done)
{
size_t rc;
if (len == 0)
return -ENAMETOOLONG;
if (len < 0)
return -EFAULT;
/* XXX: Should return ENAMETOOLONG if 'strlen(from) > len' */
memset(to, 0, len);
rc = copyin(from, to, len - 1);
if (done != NULL)
*done = rc;
return 0;
}
#if 0
/* The approximate total number of free pages */
#define freemem 0
/* The average number of free pages over the last 5 seconds */
#define avefree 0
/* The average number of free pages over the last 30 seconds */
#define avefree30 0
/* A guess as to how much memory has been promised to
* processes but not yet allocated */
#define deficit 0
/* A guess as to how many page are needed to satisfy
* stalled page creation requests */
#define needfree 0
/* A bootlean the controls the setting of deficit */
#define desperate
/* When free memory is above this limit, no paging or swapping is done */
#define lotsfree 0
/* When free memory is above this limit, swapping is not performed */
#define desfree 0
/* Threshold for many low memory tests, e.g. swapping is
* more active below this limit */
#define minfree 0
#endif
#endif /* SPL_VMSYSTM_H */
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