arch/rx/include/asm/uaccess.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_UACCESS_H
   3 #define _ASM_UACCESS_H
   4
   5 #include <linux/string.h>
   6
   7 static inline __must_check unsigned long
   8 raw_copy_from_user(void *to, const void __user * from, unsigned long n)
   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
  28 static inline __must_check unsigned long
  29 raw_copy_to_user(void __user *to, const void *from, unsigned long n)
  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 }
  50 #define INLINE_COPY_FROM_USER
  51 #define INLINE_COPY_TO_USER
  52
  53 #include <asm-generic/uaccess.h>
  54
  55 #endif