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