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Linux kernel mirror (for testing) git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475/* SPDX-License-Identifier: GPL-2.0 */#ifndef _LINUX_ZSWAP_H#define _LINUX_ZSWAP_H
#include <linux/types.h>#include <linux/mm_types.h>
struct lruvec;
extern atomic_long_t zswap_stored_pages;
#ifdef CONFIG_ZSWAP
struct zswap_lruvec_state { /* * Number of swapped in pages from disk, i.e not found in the zswap pool. * * This is consumed and subtracted from the lru size in * zswap_shrinker_count() to penalize past overshrinking that led to disk * swapins. The idea is that had we considered this many more pages in the * LRU active/protected and not written them back, we would not have had to * swapped them in. */ atomic_long_t nr_disk_swapins;};
unsigned long zswap_total_pages(void);bool zswap_store(struct folio *folio);int zswap_load(struct folio *folio);void zswap_invalidate(swp_entry_t swp);int zswap_swapon(int type, unsigned long nr_pages);void zswap_swapoff(int type);void zswap_memcg_offline_cleanup(struct mem_cgroup *memcg);void zswap_lruvec_state_init(struct lruvec *lruvec);void zswap_folio_swapin(struct folio *folio);bool zswap_is_enabled(void);bool zswap_never_enabled(void);#else
struct zswap_lruvec_state {};
static inline bool zswap_store(struct folio *folio){ return false;}
static inline int zswap_load(struct folio *folio){ return -ENOENT;}
static inline void zswap_invalidate(swp_entry_t swp) {}static inline int zswap_swapon(int type, unsigned long nr_pages){ return 0;}static inline void zswap_swapoff(int type) {}static inline void zswap_memcg_offline_cleanup(struct mem_cgroup *memcg) {}static inline void zswap_lruvec_state_init(struct lruvec *lruvec) {}static inline void zswap_folio_swapin(struct folio *folio) {}
static inline bool zswap_is_enabled(void){ return false;}
static inline bool zswap_never_enabled(void){ return true;}
#endif
#endif /* _LINUX_ZSWAP_H */