115 	struct swap_slots_cache *cache;  in alloc_swap_slot_cache()  local
136 	cache = &per_cpu(swp_slots, cpu);  in alloc_swap_slot_cache()
137 	if (cache->slots || cache->slots_ret) {  in alloc_swap_slot_cache()
147 	if (!cache->lock_initialized) {  in alloc_swap_slot_cache()
148 		mutex_init(&cache->alloc_lock);  in alloc_swap_slot_cache()
149 		spin_lock_init(&cache->free_lock);  in alloc_swap_slot_cache()
150 		cache->lock_initialized = true;  in alloc_swap_slot_cache()
152 	cache->nr = 0;  in alloc_swap_slot_cache()
153 	cache->cur = 0;  in alloc_swap_slot_cache()
154 	cache->n_ret = 0;  in alloc_swap_slot_cache()
162 	cache->slots = slots;  in alloc_swap_slot_cache()
163 	cache->slots_ret = slots_ret;  in alloc_swap_slot_cache()
171 	struct swap_slots_cache *cache;  in drain_slots_cache_cpu()  local
174 	cache = &per_cpu(swp_slots, cpu);  in drain_slots_cache_cpu()
175 	if ((type & SLOTS_CACHE) && cache->slots) {  in drain_slots_cache_cpu()
176 		mutex_lock(&cache->alloc_lock);  in drain_slots_cache_cpu()
177 		swapcache_free_entries(cache->slots + cache->cur, cache->nr);  in drain_slots_cache_cpu()
178 		cache->cur = 0;  in drain_slots_cache_cpu()
179 		cache->nr = 0;  in drain_slots_cache_cpu()
180 		if (free_slots && cache->slots) {  in drain_slots_cache_cpu()
181 			kvfree(cache->slots);  in drain_slots_cache_cpu()
182 			cache->slots = NULL;  in drain_slots_cache_cpu()
184 		mutex_unlock(&cache->alloc_lock);  in drain_slots_cache_cpu()
186 	if ((type & SLOTS_CACHE_RET) && cache->slots_ret) {  in drain_slots_cache_cpu()
187 		spin_lock_irq(&cache->free_lock);  in drain_slots_cache_cpu()
188 		swapcache_free_entries(cache->slots_ret, cache->n_ret);  in drain_slots_cache_cpu()
189 		cache->n_ret = 0;  in drain_slots_cache_cpu()
190 		if (free_slots && cache->slots_ret) {  in drain_slots_cache_cpu()
191 			slots = cache->slots_ret;  in drain_slots_cache_cpu()
192 			cache->slots_ret = NULL;  in drain_slots_cache_cpu()
194 		spin_unlock_irq(&cache->free_lock);  in drain_slots_cache_cpu()
259 static int refill_swap_slots_cache(struct swap_slots_cache *cache)  in refill_swap_slots_cache()  argument
264 	cache->cur = 0;  in refill_swap_slots_cache()
266 		cache->nr = get_swap_pages(SWAP_SLOTS_CACHE_SIZE,  in refill_swap_slots_cache()
267 					   cache->slots, 1);  in refill_swap_slots_cache()
269 	return cache->nr;  in refill_swap_slots_cache()
274 	struct swap_slots_cache *cache;  in free_swap_slot()  local
276 	cache = raw_cpu_ptr(&swp_slots);  in free_swap_slot()
277 	if (likely(use_swap_slot_cache && cache->slots_ret)) {  in free_swap_slot()
278 		spin_lock_irq(&cache->free_lock);  in free_swap_slot()
280 		if (!use_swap_slot_cache || !cache->slots_ret) {  in free_swap_slot()
281 			spin_unlock_irq(&cache->free_lock);  in free_swap_slot()
284 		if (cache->n_ret >= SWAP_SLOTS_CACHE_SIZE) {  in free_swap_slot()
291 			swapcache_free_entries(cache->slots_ret, cache->n_ret);  in free_swap_slot()
292 			cache->n_ret = 0;  in free_swap_slot()
294 		cache->slots_ret[cache->n_ret++] = entry;  in free_swap_slot()
295 		spin_unlock_irq(&cache->free_lock);  in free_swap_slot()
305 	struct swap_slots_cache *cache;  in folio_alloc_swap()  local
324 	cache = raw_cpu_ptr(&swp_slots);  in folio_alloc_swap()
326 	if (likely(check_cache_active() && cache->slots)) {  in folio_alloc_swap()
327 		mutex_lock(&cache->alloc_lock);  in folio_alloc_swap()
328 		if (cache->slots) {  in folio_alloc_swap()
330 			if (cache->nr) {  in folio_alloc_swap()
331 				entry = cache->slots[cache->cur];  in folio_alloc_swap()
332 				cache->slots[cache->cur++].val = 0;  in folio_alloc_swap()
333 				cache->nr--;  in folio_alloc_swap()
334 			} else if (refill_swap_slots_cache(cache)) {  in folio_alloc_swap()
338 		mutex_unlock(&cache->alloc_lock);  in folio_alloc_swap()