This source file includes following definitions.
- __copy_to_user_inatomic
- __copy_to_user
- __copy_from_user_inatomic
- __copy_from_user
- __copy_from_user_nocache
- __copy_from_user_inatomic_nocache
#ifndef _ASM_X86_UACCESS_32_H
#define _ASM_X86_UACCESS_32_H
#include <linux/errno.h>
#include <linux/thread_info.h>
#include <linux/string.h>
#include <asm/asm.h>
#include <asm/page.h>
unsigned long __must_check __copy_to_user_ll
(void __user *to, const void *from, unsigned long n);
unsigned long __must_check __copy_from_user_ll
(void *to, const void __user *from, unsigned long n);
unsigned long __must_check __copy_from_user_ll_nozero
(void *to, const void __user *from, unsigned long n);
unsigned long __must_check __copy_from_user_ll_nocache
(void *to, const void __user *from, unsigned long n);
unsigned long __must_check __copy_from_user_ll_nocache_nozero
(void *to, const void __user *from, unsigned long n);
static __always_inline unsigned long __must_check
__copy_to_user_inatomic(void __user *to, const void *from, unsigned long n)
{
if (__builtin_constant_p(n)) {
unsigned long ret;
switch (n) {
case 1:
__put_user_size(*(u8 *)from, (u8 __user *)to,
1, ret, 1);
return ret;
case 2:
__put_user_size(*(u16 *)from, (u16 __user *)to,
2, ret, 2);
return ret;
case 4:
__put_user_size(*(u32 *)from, (u32 __user *)to,
4, ret, 4);
return ret;
}
}
return __copy_to_user_ll(to, from, n);
}
static __always_inline unsigned long __must_check
__copy_to_user(void __user *to, const void *from, unsigned long n)
{
might_fault();
return __copy_to_user_inatomic(to, from, n);
}
static __always_inline unsigned long
__copy_from_user_inatomic(void *to, const void __user *from, unsigned long n)
{
if (__builtin_constant_p(n)) {
unsigned long ret;
switch (n) {
case 1:
__get_user_size(*(u8 *)to, from, 1, ret, 1);
return ret;
case 2:
__get_user_size(*(u16 *)to, from, 2, ret, 2);
return ret;
case 4:
__get_user_size(*(u32 *)to, from, 4, ret, 4);
return ret;
}
}
return __copy_from_user_ll_nozero(to, from, n);
}
static __always_inline unsigned long
__copy_from_user(void *to, const void __user *from, unsigned long n)
{
might_fault();
if (__builtin_constant_p(n)) {
unsigned long ret;
switch (n) {
case 1:
__get_user_size(*(u8 *)to, from, 1, ret, 1);
return ret;
case 2:
__get_user_size(*(u16 *)to, from, 2, ret, 2);
return ret;
case 4:
__get_user_size(*(u32 *)to, from, 4, ret, 4);
return ret;
}
}
return __copy_from_user_ll(to, from, n);
}
static __always_inline unsigned long __copy_from_user_nocache(void *to,
const void __user *from, unsigned long n)
{
might_fault();
if (__builtin_constant_p(n)) {
unsigned long ret;
switch (n) {
case 1:
__get_user_size(*(u8 *)to, from, 1, ret, 1);
return ret;
case 2:
__get_user_size(*(u16 *)to, from, 2, ret, 2);
return ret;
case 4:
__get_user_size(*(u32 *)to, from, 4, ret, 4);
return ret;
}
}
return __copy_from_user_ll_nocache(to, from, n);
}
static __always_inline unsigned long
__copy_from_user_inatomic_nocache(void *to, const void __user *from,
unsigned long n)
{
return __copy_from_user_ll_nocache_nozero(to, from, n);
}
#endif