// SPDX-License-Identifier: GPL-2.0
  #include <linux/uaccess.h>
  
  /* out-of-line parts */
  
  #ifndef INLINE_COPY_FROM_USER
  unsigned long _copy_from_user(void *to, const void __user *from, unsigned long n)
  {
  	unsigned long res = n;
  	might_fault();
  	if (likely(access_ok(VERIFY_READ, from, n))) {
  		kasan_check_write(to, n);
  		res = raw_copy_from_user(to, from, n);
  	}
  	if (unlikely(res))
  		memset(to + (n - res), 0, res);
  	return res;
  }
  EXPORT_SYMBOL(_copy_from_user);
  #endif
  
  #ifndef INLINE_COPY_TO_USER
  unsigned long _copy_to_user(void __user *to, const void *from, unsigned long n)
  {
  	might_fault();
  	if (likely(access_ok(VERIFY_WRITE, to, n))) {
  		kasan_check_read(from, n);
  		n = raw_copy_to_user(to, from, n);
  	}
  	return n;
  }
  EXPORT_SYMBOL(_copy_to_user);
  #endif