forked from luck/tmp_suning_uos_patched
86 lines
2.0 KiB
C
86 lines
2.0 KiB
C
|
/*
|
||
|
|
* include/linux/pagevec.h
|
||
|
|
*
|
||
|
|
* In many places it is efficient to batch an operation up against multiple
|
||
|
|
* pages. A pagevec is a multipage container which is used for that.
|
||
|
|
*/
|
||
|
|
|
||
|
|
/* 14 pointers + two long's align the pagevec structure to a power of two */
|
||
|
|
#define PAGEVEC_SIZE 14
|
||
|
|
|
||
|
|
struct page;
|
||
|
|
struct address_space;
|
||
|
|
|
||
|
|
struct pagevec {
|
||
|
|
unsigned long nr;
|
||
|
|
unsigned long cold;
|
||
|
|
struct page *pages[PAGEVEC_SIZE];
|
||
|
|
};
|
||
|
|
|
||
|
|
void __pagevec_release(struct pagevec *pvec);
|
||
|
|
void __pagevec_release_nonlru(struct pagevec *pvec);
|
||
|
|
void __pagevec_free(struct pagevec *pvec);
|
||
|
|
void __pagevec_lru_add(struct pagevec *pvec);
|
||
|
|
void __pagevec_lru_add_active(struct pagevec *pvec);
|
||
|
|
void pagevec_strip(struct pagevec *pvec);
|
||
|
|
unsigned pagevec_lookup(struct pagevec *pvec, struct address_space *mapping,
|
||
|
|
pgoff_t start, unsigned nr_pages);
|
||
|
|
unsigned pagevec_lookup_tag(struct pagevec *pvec,
|
||
|
|
struct address_space *mapping, pgoff_t *index, int tag,
|
||
|
|
unsigned nr_pages);
|
||
|
|
|
||
|
|
static inline void pagevec_init(struct pagevec *pvec, int cold)
|
||
|
|
{
|
||
|
|
pvec->nr = 0;
|
||
|
|
pvec->cold = cold;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pagevec_reinit(struct pagevec *pvec)
|
||
|
|
{
|
||
|
|
pvec->nr = 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline unsigned pagevec_count(struct pagevec *pvec)
|
||
|
|
{
|
||
|
|
return pvec->nr;
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline unsigned pagevec_space(struct pagevec *pvec)
|
||
|
|
{
|
||
|
|
return PAGEVEC_SIZE - pvec->nr;
|
||
|
|
}
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Add a page to a pagevec. Returns the number of slots still available.
|
||
|
|
*/
|
||
|
|
static inline unsigned pagevec_add(struct pagevec *pvec, struct page *page)
|
||
|
|
{
|
||
|
|
pvec->pages[pvec->nr++] = page;
|
||
|
|
return pagevec_space(pvec);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
static inline void pagevec_release(struct pagevec *pvec)
|
||
|
|
{
|
||
|
|
if (pagevec_count(pvec))
|
||
|
|
__pagevec_release(pvec);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pagevec_release_nonlru(struct pagevec *pvec)
|
||
|
|
{
|
||
|
|
if (pagevec_count(pvec))
|
||
|
|
__pagevec_release_nonlru(pvec);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pagevec_free(struct pagevec *pvec)
|
||
|
|
{
|
||
|
|
if (pagevec_count(pvec))
|
||
|
|
__pagevec_free(pvec);
|
||
|
|
}
|
||
|
|
|
||
|
|
static inline void pagevec_lru_add(struct pagevec *pvec)
|
||
|
|
{
|
||
|
|
if (pagevec_count(pvec))
|
||
|
|
__pagevec_lru_add(pvec);
|
||
|
|
}
|