You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
42 lines
1.1 KiB
42 lines
1.1 KiB
20 years ago
|
/*
|
||
|
|
* Functions which are too large to be inlined.
|
||
|
|
*
|
||
|
|
* This program is free software; you can redistribute it and/or
|
||
|
|
* modify it under the terms of the GNU General Public License
|
||
|
|
* as published by the Free Software Foundation; either version
|
||
|
|
* 2 of the License, or (at your option) any later version.
|
||
|
|
*/
|
||
|
|
#include <linux/module.h>
|
||
|
|
#include <asm/uaccess.h>
|
||
|
|
|
||
|
|
unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
|
||
|
|
{
|
||
|
|
if (likely(access_ok(VERIFY_READ, from, n)))
|
||
|
|
n = __copy_from_user(to, from, n);
|
||
|
|
else
|
||
|
|
memset(to, 0, n);
|
||
|
|
return n;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
|
||
|
|
{
|
||
|
|
if (likely(access_ok(VERIFY_WRITE, to, n)))
|
||
|
|
n = __copy_to_user(to, from, n);
|
||
|
|
return n;
|
||
|
|
}
|
||
|
|
|
||
|
|
unsigned long copy_in_user(void __user *to, const void __user *from,
|
||
|
|
unsigned long n)
|
||
|
|
{
|
||
|
|
might_sleep();
|
||
|
|
if (likely(access_ok(VERIFY_READ, from, n) &&
|
||
|
|
access_ok(VERIFY_WRITE, to, n)))
|
||
|
|
n =__copy_tofrom_user(to, from, n);
|
||
|
|
return n;
|
||
|
|
}
|
||
|
|
|
||
|
|
EXPORT_SYMBOL(copy_from_user);
|
||
|
|
EXPORT_SYMBOL(copy_to_user);
|
||
|
|
EXPORT_SYMBOL(copy_in_user);
|
||
|
|
|