42 строки
1.1 KiB
C
42 строки
1.1 KiB
C
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/*
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* Functions which are too large to be inlined.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version
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* 2 of the License, or (at your option) any later version.
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*/
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#include <linux/module.h>
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#include <asm/uaccess.h>
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unsigned long copy_from_user(void *to, const void __user *from, unsigned long n)
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{
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if (likely(access_ok(VERIFY_READ, from, n)))
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n = __copy_from_user(to, from, n);
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else
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memset(to, 0, n);
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return n;
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}
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unsigned long copy_to_user(void __user *to, const void *from, unsigned long n)
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{
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if (likely(access_ok(VERIFY_WRITE, to, n)))
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n = __copy_to_user(to, from, n);
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return n;
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}
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unsigned long copy_in_user(void __user *to, const void __user *from,
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unsigned long n)
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{
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might_sleep();
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if (likely(access_ok(VERIFY_READ, from, n) &&
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access_ok(VERIFY_WRITE, to, n)))
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n =__copy_tofrom_user(to, from, n);
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return n;
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}
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EXPORT_SYMBOL(copy_from_user);
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EXPORT_SYMBOL(copy_to_user);
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EXPORT_SYMBOL(copy_in_user);
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