unsigned long __copy_from_user (void * to, const void __user * from, unsigned long n);
User context only. This function may sleep.
Copy data from user space to kernel space. Caller must check the specified block with access_ok before calling this function.
Returns number of bytes that could not be copied. On success, this will be zero.
If some data could not be copied, this function will pad the copied data to the requested size using zero bytes.
This documentation was generated with kernel version 2.6.0.