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- /* SPDX-License-Identifier: GPL-2.0 */
- #ifndef _LINUX_SWAP_SLOTS_H
- #define _LINUX_SWAP_SLOTS_H
- #include <linux/swap.h>
- #include <linux/spinlock.h>
- #include <linux/mutex.h>
- #define SWAP_SLOTS_CACHE_SIZE SWAP_BATCH
- #define THRESHOLD_ACTIVATE_SWAP_SLOTS_CACHE (5*SWAP_SLOTS_CACHE_SIZE)
- #define THRESHOLD_DEACTIVATE_SWAP_SLOTS_CACHE (2*SWAP_SLOTS_CACHE_SIZE)
- struct swap_slots_cache {
- bool lock_initialized;
- struct mutex alloc_lock; /* protects slots, nr, cur */
- swp_entry_t *slots;
- int nr;
- int cur;
- spinlock_t free_lock; /* protects slots_ret, n_ret */
- swp_entry_t *slots_ret;
- int n_ret;
- ANDROID_VENDOR_DATA(1);
- };
- void disable_swap_slots_cache_lock(void);
- void reenable_swap_slots_cache_unlock(void);
- void enable_swap_slots_cache(void);
- void free_swap_slot(swp_entry_t entry);
- extern bool swap_slot_cache_enabled;
- #endif /* _LINUX_SWAP_SLOTS_H */
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