1#ifndef IOU_ALLOC_CACHE_H
 2#define IOU_ALLOC_CACHE_H
 3
 4/*
 5 * Don't allow the cache to grow beyond this size.
 6 */
 7#define IO_ALLOC_CACHE_MAX	512
 8
 9struct io_cache_entry {
10	struct hlist_node	node;
11};
12
13static inline bool io_alloc_cache_put(struct io_alloc_cache *cache,
14				      struct io_cache_entry *entry)
15{
16	if (cache->nr_cached < IO_ALLOC_CACHE_MAX) {
17		cache->nr_cached++;
18		hlist_add_head(&entry->node, &cache->list);
 
19		return true;
20	}
21	return false;
22}
23
24static inline struct io_cache_entry *io_alloc_cache_get(struct io_alloc_cache *cache)
25{
26	if (!hlist_empty(&cache->list)) {
27		struct hlist_node *node = cache->list.first;
28
29		hlist_del(node);
30		return container_of(node, struct io_cache_entry, node);
31	}
32
33	return NULL;
34}
35
36static inline void io_alloc_cache_init(struct io_alloc_cache *cache)
 
 
37{
38	INIT_HLIST_HEAD(&cache->list);
39	cache->nr_cached = 0;
 
 
 
 
 
 
40}
41
42static inline void io_alloc_cache_free(struct io_alloc_cache *cache,
43					void (*free)(struct io_cache_entry *))
44{
45	while (!hlist_empty(&cache->list)) {
46		struct hlist_node *node = cache->list.first;
47
48		hlist_del(node);
49		free(container_of(node, struct io_cache_entry, node));
50	}
51	cache->nr_cached = 0;
 
 
 
 
52}
53#endif

 1#ifndef IOU_ALLOC_CACHE_H
 2#define IOU_ALLOC_CACHE_H
 3
 4/*
 5 * Don't allow the cache to grow beyond this size.
 6 */
 7#define IO_ALLOC_CACHE_MAX	128
 
 
 
 
 8
 9static inline bool io_alloc_cache_put(struct io_alloc_cache *cache,
10				      void *entry)
11{
12	if (cache->nr_cached < cache->max_cached) {
13		if (!kasan_mempool_poison_object(entry))
14			return false;
15		cache->entries[cache->nr_cached++] = entry;
16		return true;
17	}
18	return false;
19}
20
21static inline void *io_alloc_cache_get(struct io_alloc_cache *cache)
22{
23	if (cache->nr_cached) {
24		void *entry = cache->entries[--cache->nr_cached];
25
26		kasan_mempool_unpoison_object(entry, cache->elem_size);
27		return entry;
28	}
29
30	return NULL;
31}
32
33/* returns false if the cache was initialized properly */
34static inline bool io_alloc_cache_init(struct io_alloc_cache *cache,
35				       unsigned max_nr, size_t size)
36{
37	cache->entries = kvmalloc_array(max_nr, sizeof(void *), GFP_KERNEL);
38	if (cache->entries) {
39		cache->nr_cached = 0;
40		cache->max_cached = max_nr;
41		cache->elem_size = size;
42		return false;
43	}
44	return true;
45}
46
47static inline void io_alloc_cache_free(struct io_alloc_cache *cache,
48				       void (*free)(const void *))
49{
50	void *entry;
 
51
52	if (!cache->entries)
53		return;
54
55	while ((entry = io_alloc_cache_get(cache)) != NULL)
56		free(entry);
57
58	kvfree(cache->entries);
59	cache->entries = NULL;
60}
61#endif