1 #include <linux/uaccess.h> 2 3 /* out-of-line parts */ 4 5 #ifndef INLINE_COPY_FROM_USER 6 unsigned 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 } 15 EXPORT_SYMBOL(_copy_from_user); 16 #endif 17 18 #ifndef INLINE_COPY_TO_USER 19 unsigned 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 } 25 EXPORT_SYMBOL(_copy_to_user); 26 #endif 27