Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  3)  * Copyright (C) 2013 Richard Weinberger <richrd@nod.at>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  4)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  5) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  6) #include <linux/uaccess.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  7) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  8) #include <os.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) bool copy_from_kernel_nofault_allowed(const void *src, size_t size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) 	void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) 	if ((unsigned long)src < PAGE_SIZE || size <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) 	if (os_mincore(psrc, size + src - psrc) <= 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) 		return false;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) 	return true;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) }