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2bdb28fbe0
git-svn-id: https://outreach.scidac.gov/svn/spl/trunk@48 7e1ea52c-4ff2-0310-8f11-9dd32ca42a1c
87 lines
1.9 KiB
C
87 lines
1.9 KiB
C
#ifndef _SPL_VMSYSTM_H
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#define _SPL_VMSYSTM_H
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#include <linux/mm.h>
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#include <sys/types.h>
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#include <asm/uaccess.h>
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extern vmem_t *zio_alloc_arena; /* arena for zio caches */
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#define physmem num_physpages
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#define ptob(pages) (pages * PAGE_SIZE)
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#define membar_producer() smp_wmb()
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#define xcopyin(from, to, size) copy_from_user(to, from, size)
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#define xcopyout(from, to, size) copy_to_user(to, from, size)
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static __inline__ int
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copyin(const void *from, void *to, size_t len)
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{
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/* On error copyin routine returns -1 */
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if (xcopyin(from, to, len))
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return -1;
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return 0;
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}
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static __inline__ int
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copyout(const void *from, void *to, size_t len)
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{
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/* On error copyout routine returns -1 */
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if (xcopyout(from, to, len))
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return -1;
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return 0;
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}
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static __inline__ int
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copyinstr(const void *from, void *to, size_t len, size_t *done)
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{
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if (len == 0)
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return -ENAMETOOLONG;
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if (len < 0)
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return -EFAULT;
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/* XXX: Should return ENAMETOOLONG if 'strlen(from) > len' */
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memset(to, 0, len);
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*done = copyin(from, to, len - 1);
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return 0;
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}
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#if 0
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/* The approximate total number of free pages */
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#define freemem 0
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/* The average number of free pages over the last 5 seconds */
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#define avefree 0
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/* The average number of free pages over the last 30 seconds */
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#define avefree30 0
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/* A guess as to how much memory has been promised to
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* processes but not yet allocated */
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#define deficit 0
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/* A guess as to how many page are needed to satisfy
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* stalled page creation requests */
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#define needfree 0
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/* A bootlean the controls the setting of deficit */
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#define desperate
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/* When free memory is above this limit, no paging or swapping is done */
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#define lotsfree 0
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/* When free memory is above this limit, swapping is not performed */
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#define desfree 0
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/* Threshold for many low memory tests, e.g. swapping is
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* more active below this limit */
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#define minfree 0
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#endif
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#endif /* SPL_VMSYSTM_H */
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