1// SPDX-License-Identifier: GPL-2.0
2#include <linux/uaccess.h>
3
4/* out-of-line parts */
5
6#ifndef INLINE_COPY_FROM_USER
7unsigned long _copy_from_user(void *to, const void __user *from, unsigned long n)
8{
9 unsigned long res = n;
10 might_fault();
11 if (likely(access_ok(from, n))) {
12 kasan_check_write(to, n);
13 res = raw_copy_from_user(to, from, n);
14 }
15 if (unlikely(res))
16 memset(to + (n - res), 0, res);
17 return res;
18}
19EXPORT_SYMBOL(_copy_from_user);
20#endif
21
22#ifndef INLINE_COPY_TO_USER
23unsigned long _copy_to_user(void __user *to, const void *from, unsigned long n)
24{
25 might_fault();
26 if (likely(access_ok(to, n))) {
27 kasan_check_read(from, n);
28 n = raw_copy_to_user(to, from, n);
29 }
30 return n;
31}
32EXPORT_SYMBOL(_copy_to_user);
33#endif
34