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https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/
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be7052a4b5
Convert net.c to use struct iou_vec. Signed-off-by: Pavel Begunkov <asml.silence@gmail.com> Link: https://lore.kernel.org/r/6437b57dabed44eca708c02e390529c7ed211c78.1741362889.git.asml.silence@gmail.com Signed-off-by: Jens Axboe <axboe@kernel.dk>
69 lines
1.5 KiB
C
69 lines
1.5 KiB
C
#ifndef IOU_ALLOC_CACHE_H
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#define IOU_ALLOC_CACHE_H
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#include <linux/io_uring_types.h>
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/*
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* Don't allow the cache to grow beyond this size.
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*/
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#define IO_ALLOC_CACHE_MAX 128
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void io_alloc_cache_free(struct io_alloc_cache *cache,
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void (*free)(const void *));
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bool io_alloc_cache_init(struct io_alloc_cache *cache,
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unsigned max_nr, unsigned int size,
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unsigned int init_bytes);
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void *io_cache_alloc_new(struct io_alloc_cache *cache, gfp_t gfp);
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static inline bool io_alloc_cache_put(struct io_alloc_cache *cache,
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void *entry)
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{
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if (cache->nr_cached < cache->max_cached) {
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if (!kasan_mempool_poison_object(entry))
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return false;
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cache->entries[cache->nr_cached++] = entry;
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return true;
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}
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return false;
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}
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static inline void *io_alloc_cache_get(struct io_alloc_cache *cache)
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{
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if (cache->nr_cached) {
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void *entry = cache->entries[--cache->nr_cached];
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/*
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* If KASAN is enabled, always clear the initial bytes that
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* must be zeroed post alloc, in case any of them overlap
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* with KASAN storage.
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*/
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#if defined(CONFIG_KASAN)
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kasan_mempool_unpoison_object(entry, cache->elem_size);
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if (cache->init_clear)
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memset(entry, 0, cache->init_clear);
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#endif
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return entry;
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}
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return NULL;
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}
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static inline void *io_cache_alloc(struct io_alloc_cache *cache, gfp_t gfp)
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{
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void *obj;
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obj = io_alloc_cache_get(cache);
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if (obj)
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return obj;
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return io_cache_alloc_new(cache, gfp);
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}
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static inline void io_cache_free(struct io_alloc_cache *cache, void *obj)
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{
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if (!io_alloc_cache_put(cache, obj))
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kfree(obj);
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}
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#endif
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