1/*
 2 * Functions which are too large to be inlined.
 3 *
 4 * This program is free software; you can redistribute it and/or
 5 * modify it under the terms of the GNU General Public License
 6 * as published by the Free Software Foundation; either version
 7 * 2 of the License, or (at your option) any later version.
 8 */
 9#include <linux/module.h>
10#include <asm/uaccess.h>
11
12unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
13{
14	if (likely(access_ok(VERIFY_READ, from, n)))
15		n = __copy_from_user(to, from, n);
16	else
17		memset(to, 0, n);
18	return n;
19}
20
21unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
22{
23	if (likely(access_ok(VERIFY_WRITE, to, n)))
24		n = __copy_to_user(to, from, n);
25	return n;
26}
27
28unsigned long copy_in_user(void __user *to, const void __user *from,
29			   unsigned long n)
30{
31	might_sleep();
32	if (likely(access_ok(VERIFY_READ, from, n) &&
33	    access_ok(VERIFY_WRITE, to, n)))
34		n =__copy_tofrom_user(to, from, n);
35	return n;
36}
37
38EXPORT_SYMBOL(copy_from_user);
39EXPORT_SYMBOL(copy_to_user);
40EXPORT_SYMBOL(copy_in_user);
41