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asm-generic/uaccess.h: don't mess with __copy_{to,from}_user

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only h8300 actually used those; might as well define them there.

Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro
2017-03-28 00:51:43 -04:00
parent db68ce10c4
commit 3fb5007528
6 changed files with 52 additions and 71 deletions
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63
include/asm-generic/uaccess.h
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@@ -47,69 +47,6 @@ static inline int __access_ok(unsigned long addr, unsigned long size)
}
#endif
/*
* architectures with an MMU should override these two
*/
#ifndef __copy_from_user
static inline __must_check long __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;
#ifdef CONFIG_64BIT
case 8:
*(u64 *)to = *(u64 __force *)from;
return 0;
#endif
default:
break;
}
}
memcpy(to, (const void __force *)from, n);
return 0;
}
#endif
#ifndef __copy_to_user
static inline __must_check long __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;
#ifdef CONFIG_64BIT
case 8:
*(u64 __force *)to = *(u64 *)from;
return 0;
#endif
default:
break;
}
}
memcpy((void __force *)to, from, n);
return 0;
}
#endif
/*
* These are the main single-value transfer routines. They automatically
* use the right size if we just have the right pointer type.