https://github.com/torvalds/linux
- HEAD
- refs/heads/arm64-uaccess
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/certifi-2024.7.4
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/idna-3.7
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/requests-2.32.2
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/setuptools-70.0.0
- refs/heads/dependabot/pip/drivers/gpu/drm/ci/xfails/urllib3-2.2.2
- refs/heads/master
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- v2.6.20-rc4
- v2.6.20-rc3
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Tip revision: 085b7755808aa11f78ab9377257e1dad2e6fa4bb authored by Linus Torvalds on 21 April 2019, 17:45:57 UTC
Linux 5.1-rc6
Linux 5.1-rc6
Tip revision: 085b775
mbcache.h
/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _LINUX_MBCACHE_H
#define _LINUX_MBCACHE_H
#include <linux/hash.h>
#include <linux/list_bl.h>
#include <linux/list.h>
#include <linux/atomic.h>
#include <linux/fs.h>
struct mb_cache;
struct mb_cache_entry {
/* List of entries in cache - protected by cache->c_list_lock */
struct list_head e_list;
/* Hash table list - protected by hash chain bitlock */
struct hlist_bl_node e_hash_list;
atomic_t e_refcnt;
/* Key in hash - stable during lifetime of the entry */
u32 e_key;
u32 e_referenced:1;
u32 e_reusable:1;
/* User provided value - stable during lifetime of the entry */
u64 e_value;
};
struct mb_cache *mb_cache_create(int bucket_bits);
void mb_cache_destroy(struct mb_cache *cache);
int mb_cache_entry_create(struct mb_cache *cache, gfp_t mask, u32 key,
u64 value, bool reusable);
void __mb_cache_entry_free(struct mb_cache_entry *entry);
static inline int mb_cache_entry_put(struct mb_cache *cache,
struct mb_cache_entry *entry)
{
if (!atomic_dec_and_test(&entry->e_refcnt))
return 0;
__mb_cache_entry_free(entry);
return 1;
}
void mb_cache_entry_delete(struct mb_cache *cache, u32 key, u64 value);
struct mb_cache_entry *mb_cache_entry_get(struct mb_cache *cache, u32 key,
u64 value);
struct mb_cache_entry *mb_cache_entry_find_first(struct mb_cache *cache,
u32 key);
struct mb_cache_entry *mb_cache_entry_find_next(struct mb_cache *cache,
struct mb_cache_entry *entry);
void mb_cache_entry_touch(struct mb_cache *cache,
struct mb_cache_entry *entry);
#endif /* _LINUX_MBCACHE_H */