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author | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
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committer | Srikant Patnaik | 2015-01-11 12:28:04 +0530 |
commit | 871480933a1c28f8a9fed4c4d34d06c439a7a422 (patch) | |
tree | 8718f573808810c2a1e8cb8fb6ac469093ca2784 /include/linux/pagevec.h | |
parent | 9d40ac5867b9aefe0722bc1f110b965ff294d30d (diff) | |
download | FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.gz FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.tar.bz2 FOSSEE-netbook-kernel-source-871480933a1c28f8a9fed4c4d34d06c439a7a422.zip |
Moved, renamed, and deleted files
The original directory structure was scattered and unorganized.
Changes are basically to make it look like kernel structure.
Diffstat (limited to 'include/linux/pagevec.h')
-rw-r--r-- | include/linux/pagevec.h | 99 |
1 files changed, 99 insertions, 0 deletions
diff --git a/include/linux/pagevec.h b/include/linux/pagevec.h new file mode 100644 index 00000000..2aa12b84 --- /dev/null +++ b/include/linux/pagevec.h @@ -0,0 +1,99 @@ +/* + * 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_lru_add(struct pagevec *pvec, enum lru_list lru); +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_lru_add_anon(struct pagevec *pvec) +{ + __pagevec_lru_add(pvec, LRU_INACTIVE_ANON); +} + +static inline void __pagevec_lru_add_active_anon(struct pagevec *pvec) +{ + __pagevec_lru_add(pvec, LRU_ACTIVE_ANON); +} + +static inline void __pagevec_lru_add_file(struct pagevec *pvec) +{ + __pagevec_lru_add(pvec, LRU_INACTIVE_FILE); +} + +static inline void __pagevec_lru_add_active_file(struct pagevec *pvec) +{ + __pagevec_lru_add(pvec, LRU_ACTIVE_FILE); +} + +static inline void pagevec_lru_add_file(struct pagevec *pvec) +{ + if (pagevec_count(pvec)) + __pagevec_lru_add_file(pvec); +} + +static inline void pagevec_lru_add_anon(struct pagevec *pvec) +{ + if (pagevec_count(pvec)) + __pagevec_lru_add_anon(pvec); +} + +#endif /* _LINUX_PAGEVEC_H */ |