arch/h8300/include/asm/uaccess.h

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