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bc4a68adb1
The return value of free_swap_slot is always 0 and also ignored now. Remove it to clean up the code. Link: https://lkml.kernel.org/r/20220509131416.17553-5-linmiaohe@huawei.com Signed-off-by: Miaohe Lin <linmiaohe@huawei.com> Reviewed-by: David Hildenbrand <david@redhat.com> Reviewed-by: Oscar Salvador <osalvador@suse.de> Cc: Alistair Popple <apopple@nvidia.com> Cc: David Howells <dhowells@redhat.com> Cc: Matthew Wilcox <willy@infradead.org> Cc: Naoya Horiguchi <naoya.horiguchi@nec.com> Cc: NeilBrown <neilb@suse.de> Cc: Peter Xu <peterx@redhat.com> Cc: Suren Baghdasaryan <surenb@google.com> Cc: Vlastimil Babka <vbabka@suse.cz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
31 lines
842 B
C
31 lines
842 B
C
/* SPDX-License-Identifier: GPL-2.0 */
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#ifndef _LINUX_SWAP_SLOTS_H
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#define _LINUX_SWAP_SLOTS_H
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#include <linux/swap.h>
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#include <linux/spinlock.h>
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#include <linux/mutex.h>
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#define SWAP_SLOTS_CACHE_SIZE SWAP_BATCH
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#define THRESHOLD_ACTIVATE_SWAP_SLOTS_CACHE (5*SWAP_SLOTS_CACHE_SIZE)
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#define THRESHOLD_DEACTIVATE_SWAP_SLOTS_CACHE (2*SWAP_SLOTS_CACHE_SIZE)
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struct swap_slots_cache {
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bool lock_initialized;
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struct mutex alloc_lock; /* protects slots, nr, cur */
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swp_entry_t *slots;
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int nr;
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int cur;
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spinlock_t free_lock; /* protects slots_ret, n_ret */
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swp_entry_t *slots_ret;
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int n_ret;
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};
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void disable_swap_slots_cache_lock(void);
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void reenable_swap_slots_cache_unlock(void);
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void enable_swap_slots_cache(void);
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void free_swap_slot(swp_entry_t entry);
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extern bool swap_slot_cache_enabled;
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#endif /* _LINUX_SWAP_SLOTS_H */
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