[mirror_ubuntu-bionic-kernel.git] / arch / h8300 / include / asm / uaccess.h

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef _ASM_UACCESS_H
#define _ASM_UACCESS_H

#include <linux/string.h>

static inline __must_check unsigned long
raw_copy_from_user(void *to, const void __user * from, unsigned long n)
{
	if (__builtin_constant_p(n)) {
		switch(n) {
		case 1:
			*(u8 *)to = *(u8 __force *)from;
			return 0;
		case 2:
			*(u16 *)to = *(u16 __force *)from;
			return 0;
		case 4:
			*(u32 *)to = *(u32 __force *)from;
			return 0;
		}
	}

	memcpy(to, (const void __force *)from, n);
	return 0;
}

static inline __must_check unsigned long
raw_copy_to_user(void __user *to, const void *from, unsigned long n)
{
	if (__builtin_constant_p(n)) {
		switch(n) {
		case 1:
			*(u8 __force *)to = *(u8 *)from;
			return 0;
		case 2:
			*(u16 __force *)to = *(u16 *)from;
			return 0;
		case 4:
			*(u32 __force *)to = *(u32 *)from;
			return 0;
		default:
			break;
		}
	}

	memcpy((void __force *)to, from, n);
	return 0;
}
#define INLINE_COPY_FROM_USER
#define INLINE_COPY_TO_USER

#include <asm-generic/uaccess.h>

#endif
Commit	Line	Data
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
3fb50075 AV	2	#ifndef _ASM_UACCESS_H
	3	#define _ASM_UACCESS_H
	4
	5	#include <linux/string.h>
	6
33ab2da8 AV	7	static inline __must_check unsigned long
33ab2da8 AV	8	raw_copy_from_user(void to, const void __user from, unsigned long n)
3fb50075 AV	9	{
	10	if (__builtin_constant_p(n)) {
	11	switch(n) {
	12	case 1:
	13	(u8 )to = (u8 __force )from;
	14	return 0;
	15	case 2:
	16	(u16 )to = (u16 __force )from;
	17	return 0;
	18	case 4:
	19	(u32 )to = (u32 __force )from;
	20	return 0;
	21	}
	22	}
	23
	24	memcpy(to, (const void __force *)from, n);
	25	return 0;
	26	}
	27
33ab2da8 AV	28	static inline __must_check unsigned long
33ab2da8 AV	29	raw_copy_to_user(void __user to, const void from, unsigned long n)
3fb50075 AV	30	{
	31	if (__builtin_constant_p(n)) {
	32	switch(n) {
	33	case 1:
	34	(u8 __force )to = (u8 )from;
	35	return 0;
	36	case 2:
	37	(u16 __force )to = (u16 )from;
	38	return 0;
	39	case 4:
	40	(u32 __force )to = (u32 )from;
	41	return 0;
	42	default:
	43	break;
	44	}
	45	}
	46
	47	memcpy((void __force *)to, from, n);
	48	return 0;
	49	}
33ab2da8 AV	50	#define INLINE_COPY_FROM_USER
33ab2da8 AV	51	#define INLINE_COPY_TO_USER
3fb50075 AV	52
	53	#include <asm-generic/uaccess.h>
	54
	55	#endif