rtl8211F_led_control

hc

2024-05-11 297b60346df8beafee954a0fd7c2d64f33f3b9bc

 kernel/kernel/bpf/bpf_lru_list.h
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@@ -1,12 +1,10 @@
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+/* SPDX-License-Identifier: GPL-2.0-only */
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 /* Copyright (c) 2016 Facebook
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- *
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- * This program is free software; you can redistribute it and/or
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- * modify it under the terms of version 2 of the GNU General Public
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- * License as published by the Free Software Foundation.
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  */
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 #ifndef __BPF_LRU_LIST_H_
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 #define __BPF_LRU_LIST_H_
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+#include <linux/cache.h>
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 #include <linux/list.h>
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 #include <linux/spinlock_types.h>
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@@ -33,7 +31,7 @@
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 struct bpf_lru_list {
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 	struct list_head lists[NR_BPF_LRU_LIST_T];
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 	unsigned int counts[NR_BPF_LRU_LIST_COUNT];
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-	/* The next inacitve list rotation starts from here */
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+	/* The next inactive list rotation starts from here */
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 	struct list_head *next_inactive_rotation;
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 	raw_spinlock_t lock ____cacheline_aligned_in_smp;
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@@ -66,11 +64,8 @@
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 static inline void bpf_lru_node_set_ref(struct bpf_lru_node *node)
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 {
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-	/* ref is an approximation on access frequency.  It does not
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-	 * have to be very accurate.  Hence, no protection is used.
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-	 */
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-	if (!node->ref)
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-		node->ref = 1;
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+	if (!READ_ONCE(node->ref))
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+		WRITE_ONCE(node->ref, 1);
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 }
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 int bpf_lru_init(struct bpf_lru *lru, bool percpu, u32 hash_offset,