cregit-Linux how code gets into the kernel

Release 4.12 include/linux/pagevec.h

Directory: include/linux
/*
 * 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);
unsigned pagevec_lookup_entries(struct pagevec *pvec,
				struct address_space *mapping,
				pgoff_t start, unsigned nr_entries,
				pgoff_t *indices);
void pagevec_remove_exceptionals(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; }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton27100.00%2100.00%
Total27100.00%2100.00%


static inline void pagevec_reinit(struct pagevec *pvec) { pvec->nr = 0; }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton18100.00%2100.00%
Total18100.00%2100.00%


static inline unsigned pagevec_count(struct pagevec *pvec) { return pvec->nr; }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton17100.00%1100.00%
Total17100.00%1100.00%


static inline unsigned pagevec_space(struct pagevec *pvec) { return PAGEVEC_SIZE - pvec->nr; }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton19100.00%1100.00%
Total19100.00%1100.00%

/* * 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); }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton35100.00%1100.00%
Total35100.00%1100.00%


static inline void pagevec_release(struct pagevec *pvec) { if (pagevec_count(pvec)) __pagevec_release(pvec); }

Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton24100.00%1100.00%
Total24100.00%1100.00%

#endif /* _LINUX_PAGEVEC_H */

Overall Contributors

PersonTokensPropCommitsCommitProp
Andrew Morton23082.73%550.00%
Johannes Weiner3311.87%110.00%
David Howells93.24%110.00%
Marcelo Tosatti51.80%220.00%
Hugh Dickins10.36%110.00%
Total278100.00%10100.00%
Directory: include/linux
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