88 lines
1.9 KiB
C
88 lines
1.9 KiB
C
#ifndef _SPL_VMSYSTM_H
|
|
#define _SPL_VMSYSTM_H
|
|
|
|
#include <linux/mm.h>
|
|
#include <linux/swap.h>
|
|
#include <sys/types.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
extern vmem_t *zio_alloc_arena; /* arena for zio caches */
|
|
|
|
#define physmem num_physpages
|
|
#define freemem nr_free_pages() /* Expensive on linux,
|
|
cheap on solaris */
|
|
#define minfree 0
|
|
#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 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
|
|
#endif
|
|
|
|
#endif /* SPL_VMSYSTM_H */
|