drivers/staging/zcache/zbud.h

   1 /*
   2  * zbud.h
   3  *
   4  * Copyright (c) 2010-2012, Dan Magenheimer, Oracle Corp.
   5  *
   6  */
   7
   8 #ifndef _ZBUD_H_
   9 #define _ZBUD_H_
  10
  11 #include "tmem.h"
  12
  13 struct zbudref;
  14
  15 extern unsigned int zbud_max_buddy_size(void);
  16 extern struct zbudref *zbud_match_prep(struct tmem_handle *th, bool eph,
  17                                                 void *cdata, unsigned size);
  18 extern struct zbudref *zbud_create_prep(struct tmem_handle *th, bool eph,
  19                                                 void *cdata, unsigned size,
  20                                                 struct page *newpage);
  21 extern void zbud_create_finish(struct zbudref *, bool);
  22 extern int zbud_decompress(struct page *, struct zbudref *, bool,
  23                                 void (*func)(char *, unsigned int, char *));
  24 extern int zbud_copy_from_zbud(char *, struct zbudref *, size_t *, bool);
  25 extern int zbud_copy_to_zbud(struct zbudref *, char *, bool);
  26 extern struct page *zbud_free_and_delist(struct zbudref *, bool eph,
  27                                                 unsigned int *, unsigned int *);
  28 extern struct page *zbud_evict_pageframe_lru(unsigned int *, unsigned int *);
  29 extern unsigned int zbud_make_zombie_lru(struct tmem_handle *, unsigned char **,
  30                                                 unsigned int *, bool);
  31 extern void zbud_init(void);
  32
  33 #endif /* _ZBUD_H_ */