46 lines
1.4 KiB
C
46 lines
1.4 KiB
C
#ifndef _ZRAM_DEDUP_H_
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#define _ZRAM_DEDUP_H_
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struct zram;
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struct zram_entry;
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#ifdef CONFIG_ZRAM_DEDUP
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u64 zram_dedup_dup_size(struct zram *zram);
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u64 zram_dedup_meta_size(struct zram *zram);
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void zram_dedup_insert(struct zram *zram, struct zram_entry *new,
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u32 checksum);
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struct zram_entry *zram_dedup_find(struct zram *zram, struct page *page,
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u32 *checksum);
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void zram_dedup_init_entry(struct zram *zram, struct zram_entry *entry,
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unsigned long handle, unsigned int len);
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bool zram_dedup_put_entry(struct zram *zram, struct zram_entry *entry);
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int zram_dedup_init(struct zram *zram, size_t num_pages);
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void zram_dedup_fini(struct zram *zram);
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#else
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static inline u64 zram_dedup_dup_size(struct zram *zram) { return 0; }
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static inline u64 zram_dedup_meta_size(struct zram *zram) { return 0; }
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static inline void zram_dedup_insert(struct zram *zram, struct zram_entry *new,
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u32 checksum) { }
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static inline struct zram_entry *zram_dedup_find(struct zram *zram,
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struct page *page, u32 *checksum) { return NULL; }
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static inline void zram_dedup_init_entry(struct zram *zram,
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struct zram_entry *entry, unsigned long handle,
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unsigned int len) { }
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static inline bool zram_dedup_put_entry(struct zram *zram,
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struct zram_entry *entry) { return true; }
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static inline int zram_dedup_init(struct zram *zram,
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size_t num_pages) { return 0; }
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static inline void zram_dedup_fini(struct zram *zram) { }
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#endif
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#endif /* _ZRAM_DEDUP_H_ */
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