1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
 4 */
 5
 6#include <linux/uaccess.h>
 7#include <linux/kernel.h>
 8#include <os.h>
 9
10bool copy_from_kernel_nofault_allowed(const void *src, size_t size)
11{
12	void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE);
13
14	if ((unsigned long)src < PAGE_SIZE || size <= 0)
15		return false;
16	if (os_mincore(psrc, size + src - psrc) <= 0)
17		return false;
18	return true;
19}

 1// SPDX-License-Identifier: GPL-2.0-only
 2/*
 3 * Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
 4 */
 5
 6#include <linux/uaccess.h>
 7#include <linux/kernel.h>
 8#include <os.h>
 9
10bool copy_from_kernel_nofault_allowed(const void *src, size_t size)
11{
12	void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE);
13
14	if ((unsigned long)src < PAGE_SIZE || size <= 0)
15		return false;
16	if (os_mincore(psrc, size + src - psrc) <= 0)
17		return false;
18	return true;
19}