[axboe-block:rw_iter 73/100] drivers/misc/lis3lv02d/lis3lv02d.c:604:17: error: call to undeclared function 'iov_iter_count'; ISO C99 and later do not support implicit function declarations

[kernel test robot <lkp@intel.com>]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/axboe/linux-block.git rw_iter
head:   bb4803260393a54d3b254c2abfe121ab89cce776
commit: 3da0a9ea5378904e1a669a4b7e7130204b5bce95 [73/100] misc: lis3lv02d: convert to iterators
config: i386-buildonly-randconfig-004-20240406 (https://download.01.org/0day-ci/archive/20240406/202404061340.6zU6DYml-lkp@intel.com/config)
compiler: clang version 17.0.6 (https://github.com/llvm/llvm-project 6009708b4367171ccdbf4b5905cb6a803753fe18)
reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20240406/202404061340.6zU6DYml-lkp@intel.com/reproduce)

If you fix the issue in a separate patch/commit (i.e. not just a new version of
the same patch/commit), kindly add following tags
| Reported-by: kernel test robot <lkp@intel.com>
| Closes: https://lore.kernel.org/oe-kbuild-all/202404061340.6zU6DYml-lkp@intel.com/

All errors (new ones prefixed by >>):

>> drivers/misc/lis3lv02d/lis3lv02d.c:604:17: error: call to undeclared function 'iov_iter_count'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     604 |         size_t count = iov_iter_count(to);
         |                        ^
>> drivers/misc/lis3lv02d/lis3lv02d.c:641:7: error: call to undeclared function 'copy_to_iter_full'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
     641 |         if (!copy_to_iter_full(&byte_data, sizeof(byte_data), to))
         |              ^
   2 errors generated.


vim +/iov_iter_count +604 drivers/misc/lis3lv02d/lis3lv02d.c

   598	
   599	static ssize_t lis3lv02d_misc_read(struct kiocb *iocb, struct iov_iter *to)
   600	{
   601		struct lis3lv02d *lis3 = container_of(iocb->ki_filp->private_data,
   602						      struct lis3lv02d, miscdev);
   603	
 > 604		size_t count = iov_iter_count(to);
   605		DECLARE_WAITQUEUE(wait, current);
   606		u32 data;
   607		unsigned char byte_data;
   608		ssize_t retval = 1;
   609	
   610		if (count < 1)
   611			return -EINVAL;
   612	
   613		add_wait_queue(&lis3->misc_wait, &wait);
   614		while (true) {
   615			set_current_state(TASK_INTERRUPTIBLE);
   616			data = atomic_xchg(&lis3->count, 0);
   617			if (data)
   618				break;
   619	
   620			if (iocb->ki_filp->f_flags & O_NONBLOCK) {
   621				retval = -EAGAIN;
   622				goto out;
   623			}
   624	
   625			if (signal_pending(current)) {
   626				retval = -ERESTARTSYS;
   627				goto out;
   628			}
   629	
   630			schedule();
   631		}
   632	
   633		if (data < 255)
   634			byte_data = data;
   635		else
   636			byte_data = 255;
   637	
   638		/* make sure we are not going into copy_to_user() with
   639		 * TASK_INTERRUPTIBLE state */
   640		set_current_state(TASK_RUNNING);
 > 641		if (!copy_to_iter_full(&byte_data, sizeof(byte_data), to))
   642			retval = -EFAULT;
   643	
   644	out:
   645		__set_current_state(TASK_RUNNING);
   646		remove_wait_queue(&lis3->misc_wait, &wait);
   647	
   648		return retval;
   649	}
   650	

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