55 lines
1.3 KiB
C
55 lines
1.3 KiB
C
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// SPDX-License-Identifier: GPL-2.0-only
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/*
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* Copyright (C) 2022 - Google LLC
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* Author: Keir Fraser <keirf@google.com>
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*/
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#include <linux/list.h>
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#include <linux/bug.h>
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static inline __must_check bool nvhe_check_data_corruption(bool v)
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{
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return v;
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}
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#define NVHE_CHECK_DATA_CORRUPTION(condition) \
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nvhe_check_data_corruption(({ \
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bool corruption = unlikely(condition); \
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if (corruption) { \
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if (IS_ENABLED(CONFIG_BUG_ON_DATA_CORRUPTION)) { \
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BUG_ON(1); \
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} else \
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WARN_ON(1); \
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} \
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corruption; \
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}))
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/* The predicates checked here are taken from lib/list_debug.c. */
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bool __list_add_valid(struct list_head *new, struct list_head *prev,
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struct list_head *next)
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{
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if (NVHE_CHECK_DATA_CORRUPTION(next->prev != prev) ||
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NVHE_CHECK_DATA_CORRUPTION(prev->next != next) ||
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NVHE_CHECK_DATA_CORRUPTION(new == prev || new == next))
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return false;
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return true;
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}
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bool __list_del_entry_valid(struct list_head *entry)
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{
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struct list_head *prev, *next;
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prev = entry->prev;
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next = entry->next;
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if (NVHE_CHECK_DATA_CORRUPTION(next == LIST_POISON1) ||
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NVHE_CHECK_DATA_CORRUPTION(prev == LIST_POISON2) ||
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NVHE_CHECK_DATA_CORRUPTION(prev->next != entry) ||
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NVHE_CHECK_DATA_CORRUPTION(next->prev != entry))
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return false;
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return true;
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}
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