linux/arch/loongarch/mm/maccess.c
Huacai Chen 09cfefb7fa LoongArch: Add memory management
Add memory management support for LoongArch, including: cache and tlb
management, page fault handling and ioremap/mmap support.

Reviewed-by: WANG Xuerui <git@xen0n.name>
Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
2022-06-03 20:09:28 +08:00

11 lines
275 B
C

// SPDX-License-Identifier: GPL-2.0-only
#include <linux/uaccess.h>
#include <linux/kernel.h>
bool copy_from_kernel_nofault_allowed(const void *unsafe_src, size_t size)
{
/* highest bit set means kernel space */
return (unsigned long)unsafe_src >> (BITS_PER_LONG - 1);
}