1 files changed, 27 insertions, 32 deletions

diff --git a/io_uring/alloc_cache.h b/io_uring/alloc_cache.h
index bf2fb26a65..b7a38a2069 100644
--- a/io_uring/alloc_cache.h
+++ b/io_uring/alloc_cache.h
@@ -4,63 +4,58 @@
 /*
  * Don't allow the cache to grow beyond this size.
  */
-#define IO_ALLOC_CACHE_MAX	512
-
-struct io_cache_entry {
-	struct io_wq_work_node node;
-};
+#define IO_ALLOC_CACHE_MAX	128
 
 static inline bool io_alloc_cache_put(struct io_alloc_cache *cache,
-				      struct io_cache_entry *entry)
+				      void *entry)
 {
 	if (cache->nr_cached < cache->max_cached) {
-		cache->nr_cached++;
-		wq_stack_add_head(&entry->node, &cache->list);
-		kasan_mempool_poison_object(entry);
+		if (!kasan_mempool_poison_object(entry))
+			return false;
+		cache->entries[cache->nr_cached++] = entry;
 		return true;
 	}
 	return false;
 }
 
-static inline bool io_alloc_cache_empty(struct io_alloc_cache *cache)
-{
-	return !cache->list.next;
-}
-
-static inline struct io_cache_entry *io_alloc_cache_get(struct io_alloc_cache *cache)
+static inline void *io_alloc_cache_get(struct io_alloc_cache *cache)
 {
-	if (cache->list.next) {
-		struct io_cache_entry *entry;
+	if (cache->nr_cached) {
+		void *entry = cache->entries[--cache->nr_cached];
 
-		entry = container_of(cache->list.next, struct io_cache_entry, node);
 		kasan_mempool_unpoison_object(entry, cache->elem_size);
-		cache->list.next = cache->list.next->next;
-		cache->nr_cached--;
 		return entry;
 	}
 
 	return NULL;
 }
 
-static inline void io_alloc_cache_init(struct io_alloc_cache *cache,
+/* returns false if the cache was initialized properly */
+static inline bool io_alloc_cache_init(struct io_alloc_cache *cache,
 				       unsigned max_nr, size_t size)
 {
-	cache->list.next = NULL;
-	cache->nr_cached = 0;
-	cache->max_cached = max_nr;
-	cache->elem_size = size;
+	cache->entries = kvmalloc_array(max_nr, sizeof(void *), GFP_KERNEL);
+	if (cache->entries) {
+		cache->nr_cached = 0;
+		cache->max_cached = max_nr;
+		cache->elem_size = size;
+		return false;
+	}
+	return true;
 }
 
 static inline void io_alloc_cache_free(struct io_alloc_cache *cache,
-					void (*free)(struct io_cache_entry *))
+				       void (*free)(const void *))
 {
-	while (1) {
-		struct io_cache_entry *entry = io_alloc_cache_get(cache);
+	void *entry;
+
+	if (!cache->entries)
+		return;
 
-		if (!entry)
-			break;
+	while ((entry = io_alloc_cache_get(cache)) != NULL)
 		free(entry);
-	}
-	cache->nr_cached = 0;
+
+	kvfree(cache->entries);
+	cache->entries = NULL;
 }
 #endif