static __always_inline __must_check
int __copy_in_user(void __user *dst, const void __user *src, unsigned size)
{
- int ret = 0;
-
- might_fault();
- if (!__builtin_constant_p(size))
- return copy_user_generic((__force void *)dst,
- (__force void *)src, size);
- switch (size) {
- case 1: {
- u8 tmp;
- __uaccess_begin();
- __get_user_asm(tmp, (u8 __user *)src,
- ret, "b", "b", "=q", 1);
- if (likely(!ret))
- __put_user_asm(tmp, (u8 __user *)dst,
- ret, "b", "b", "iq", 1);
- __uaccess_end();
- return ret;
- }
- case 2: {
- u16 tmp;
- __uaccess_begin();
- __get_user_asm(tmp, (u16 __user *)src,
- ret, "w", "w", "=r", 2);
- if (likely(!ret))
- __put_user_asm(tmp, (u16 __user *)dst,
- ret, "w", "w", "ir", 2);
- __uaccess_end();
- return ret;
- }
-
- case 4: {
- u32 tmp;
- __uaccess_begin();
- __get_user_asm(tmp, (u32 __user *)src,
- ret, "l", "k", "=r", 4);
- if (likely(!ret))
- __put_user_asm(tmp, (u32 __user *)dst,
- ret, "l", "k", "ir", 4);
- __uaccess_end();
- return ret;
- }
- case 8: {
- u64 tmp;
- __uaccess_begin();
- __get_user_asm(tmp, (u64 __user *)src,
- ret, "q", "", "=r", 8);
- if (likely(!ret))
- __put_user_asm(tmp, (u64 __user *)dst,
- ret, "q", "", "er", 8);
- __uaccess_end();
- return ret;
- }
- default:
- return copy_user_generic((__force void *)dst,
- (__force void *)src, size);
- }
+ return copy_user_generic((__force void *)dst,
+ (__force void *)src, size);
}
static __must_check __always_inline int