Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
tjh.dev
kernel
os
linux
1#include <linux/uaccess.h>
2
3/* out-of-line parts */
4
5#ifndef INLINE_COPY_FROM_USER
6unsigned long _copy_from_user(void *to, const void __user *from, unsigned long n)
7{
8 unsigned long res = n;
9 if (likely(access_ok(VERIFY_READ, from, n)))
10 res = raw_copy_from_user(to, from, n);
11 if (unlikely(res))
12 memset(to + (n - res), 0, res);
13 return res;
14}
15EXPORT_SYMBOL(_copy_from_user);
16#endif
17
18#ifndef INLINE_COPY_TO_USER
19unsigned long _copy_to_user(void *to, const void __user *from, unsigned long n)
20{
21 if (likely(access_ok(VERIFY_WRITE, to, n)))
22 n = raw_copy_to_user(to, from, n);
23 return n;
24}
25EXPORT_SYMBOL(_copy_to_user);
26#endif