1 /* Public domain. */ 2 3 #ifndef _LINUXKPI_LINUX_PAGEVEC_H_ 4 #define _LINUXKPI_LINUX_PAGEVEC_H_ 5 6 #include <sys/types.h> 7 #include <sys/systm.h> 8 #include <sys/errno.h> 9 10 #include <linux/pagemap.h> 11 12 #define PAGEVEC_SIZE 15 13 14 struct pagevec { 15 uint8_t nr; 16 struct page *pages[PAGEVEC_SIZE]; 17 }; 18 19 static inline unsigned int 20 pagevec_space(struct pagevec *pvec) 21 { 22 return PAGEVEC_SIZE - pvec->nr; 23 } 24 25 static inline void 26 pagevec_init(struct pagevec *pvec) 27 { 28 pvec->nr = 0; 29 } 30 31 static inline void 32 pagevec_reinit(struct pagevec *pvec) 33 { 34 pvec->nr = 0; 35 } 36 37 static inline unsigned int 38 pagevec_count(struct pagevec *pvec) 39 { 40 return pvec->nr; 41 } 42 43 static inline unsigned int 44 pagevec_add(struct pagevec *pvec, struct page *page) 45 { 46 pvec->pages[pvec->nr++] = page; 47 return PAGEVEC_SIZE - pvec->nr; 48 } 49 50 static inline void 51 __pagevec_release(struct pagevec *pvec) 52 { 53 release_pages(pvec->pages, pagevec_count(pvec)); 54 pagevec_reinit(pvec); 55 } 56 57 static inline void 58 pagevec_release(struct pagevec *pvec) 59 { 60 if (pagevec_count(pvec)) 61 __pagevec_release(pvec); 62 } 63 64 static inline void 65 check_move_unevictable_pages(struct pagevec *pvec) 66 { 67 } 68 69 #endif /* _LINUXKPI_LINUX_PAGEVEC_H_ */ 70