diff options
Diffstat (limited to 'kernel/bpf/bpf_lru_list.h')
| -rw-r--r-- | kernel/bpf/bpf_lru_list.h | 9 |
1 files changed, 3 insertions, 6 deletions
diff --git a/kernel/bpf/bpf_lru_list.h b/kernel/bpf/bpf_lru_list.h index 6b12f06ee18c..cbd8d3720c2b 100644 --- a/kernel/bpf/bpf_lru_list.h +++ b/kernel/bpf/bpf_lru_list.h @@ -4,6 +4,7 @@ #ifndef __BPF_LRU_LIST_H_ #define __BPF_LRU_LIST_H_ +#include <linux/cache.h> #include <linux/list.h> #include <linux/spinlock_types.h> @@ -63,11 +64,8 @@ struct bpf_lru { static inline void bpf_lru_node_set_ref(struct bpf_lru_node *node) { - /* ref is an approximation on access frequency. It does not - * have to be very accurate. Hence, no protection is used. - */ - if (!node->ref) - node->ref = 1; + if (!READ_ONCE(node->ref)) + WRITE_ONCE(node->ref, 1); } int bpf_lru_init(struct bpf_lru *lru, bool percpu, u32 hash_offset, @@ -77,6 +75,5 @@ void bpf_lru_populate(struct bpf_lru *lru, void *buf, u32 node_offset, void bpf_lru_destroy(struct bpf_lru *lru); struct bpf_lru_node *bpf_lru_pop_free(struct bpf_lru *lru, u32 hash); void bpf_lru_push_free(struct bpf_lru *lru, struct bpf_lru_node *node); -void bpf_lru_promote(struct bpf_lru *lru, struct bpf_lru_node *node); #endif |