55 static void *validate_and_copy_from_user(const void __user *user_buf,  in validate_and_copy_from_user()  argument
64 	if (!access_ok(user_buf, *count))  in validate_and_copy_from_user()
72 	if (copy_from_user(buf, user_buf, nbytes)) {  in validate_and_copy_from_user()
124 			  const char __user *user_buf, size_t count,  in regs_write()  argument
132 	buf = validate_and_copy_from_user(user_buf, &count);  in regs_write()
166 static ssize_t port_regs_write(struct file *file, const char __user *user_buf,  in port_regs_write()  argument
172 	return regs_write(port->sw, port, user_buf, count, ppos);  in port_regs_write()
175 static ssize_t switch_regs_write(struct file *file, const char __user *user_buf,  in switch_regs_write()  argument
181 	return regs_write(sw, NULL, user_buf, count, ppos);  in switch_regs_write()
207 static ssize_t counters_write(struct file *file, const char __user *user_buf,  in counters_write()  argument
217 	buf = validate_and_copy_from_user(user_buf, &count);  in counters_write()