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[/] [test_project/] [trunk/] [linux_sd_driver/] [include/] [linux/] [pagevec.h] - Blame information for rev 62

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/*
 * 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.
 */
 
#ifndef _LINUX_PAGEVEC_H
#define _LINUX_PAGEVEC_H
 
/* 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);
}
 
#endif /* _LINUX_PAGEVEC_H */

Line No.	Rev	Author	Line
1	62	marcus.erl	`/*`
2			`* include/linux/pagevec.h`
3			`*`
4			`* In many places it is efficient to batch an operation up against multiple`
5			`* pages. A pagevec is a multipage container which is used for that.`
6			`*/`
7
8			`#ifndef _LINUX_PAGEVEC_H`
9			`#define _LINUX_PAGEVEC_H`
10
11			`/* 14 pointers + two long's align the pagevec structure to a power of two */`
12			`#define PAGEVEC_SIZE 14`
13
14			`struct page;`
15			`struct address_space;`
16
17			`struct pagevec {`
18			`unsigned long nr;`
19			`unsigned long cold;`
20			`struct page *pages[PAGEVEC_SIZE];`
21			`};`
22
23			`void __pagevec_release(struct pagevec *pvec);`
24			`void __pagevec_release_nonlru(struct pagevec *pvec);`
25			`void __pagevec_free(struct pagevec *pvec);`
26			`void __pagevec_lru_add(struct pagevec *pvec);`
27			`void __pagevec_lru_add_active(struct pagevec *pvec);`
28			`void pagevec_strip(struct pagevec *pvec);`
29			`unsigned pagevec_lookup(struct pagevec pvec, struct address_space mapping,`
30			`pgoff_t start, unsigned nr_pages);`
31			`unsigned pagevec_lookup_tag(struct pagevec *pvec,`
32			`struct address_space mapping, pgoff_t index, int tag,`
33			`unsigned nr_pages);`
34
35			`static inline void pagevec_init(struct pagevec *pvec, int cold)`
36			`{`
37			`pvec->nr = 0;`
38			`pvec->cold = cold;`
39			`}`
40
41			`static inline void pagevec_reinit(struct pagevec *pvec)`
42			`{`
43			`pvec->nr = 0;`
44			`}`
45
46			`static inline unsigned pagevec_count(struct pagevec *pvec)`
47			`{`
48			`return pvec->nr;`
49			`}`
50
51			`static inline unsigned pagevec_space(struct pagevec *pvec)`
52			`{`
53			`return PAGEVEC_SIZE - pvec->nr;`
54			`}`
55
56			`/*`
57			`* Add a page to a pagevec. Returns the number of slots still available.`
58			`*/`
59			`static inline unsigned pagevec_add(struct pagevec pvec, struct page page)`
60			`{`
61			`pvec->pages[pvec->nr++] = page;`
62			`return pagevec_space(pvec);`
63			`}`
64
65
66			`static inline void pagevec_release(struct pagevec *pvec)`
67			`{`
68			`if (pagevec_count(pvec))`
69			`__pagevec_release(pvec);`
70			`}`
71
72			`static inline void pagevec_release_nonlru(struct pagevec *pvec)`
73			`{`
74			`if (pagevec_count(pvec))`
75			`__pagevec_release_nonlru(pvec);`
76			`}`
77
78			`static inline void pagevec_free(struct pagevec *pvec)`
79			`{`
80			`if (pagevec_count(pvec))`
81			`__pagevec_free(pvec);`
82			`}`
83
84			`static inline void pagevec_lru_add(struct pagevec *pvec)`
85			`{`
86			`if (pagevec_count(pvec))`
87			`__pagevec_lru_add(pvec);`
88			`}`
89
90			`#endif /* _LINUX_PAGEVEC_H */`

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[/] [test_project/] [trunk/] [linux_sd_driver/] [include/] [linux/] [pagevec.h] - Blame information for rev 62