// SPDX-License-Identifier: GPL-2.0-only /* * Copyright (C) 2013 Richard Weinberger <richrd@nod.at> */ #include <linux/uaccess.h> #include <linux/kernel.h> #include <os.h> bool copy_from_kernel_nofault_allowed(const void *src, size_t size) { void *psrc = (void *)rounddown((unsigned long)src, PAGE_SIZE); if ((unsigned long)src < PAGE_SIZE || size <= 0) return false; if (os_mincore(psrc, size + src - psrc) <= 0) return false; return true; }