[jirislaby:devel 12/73] drivers/tty/rpmsg_tty.c:42:9: error: implicit declaration of function 'tty_flip_buffer_push'

[kernel test robot]

tree:   https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git devel
head:   7f6078c52635bd143cc38f0f85fbd90528e4bae5
commit: b25656716807e99cddba033240a0c000ac9da02a [12/73] tty: drop tty_flip_buffer_push
config: mips-randconfig-r014-20211028 (attached as .config)
compiler: mips-linux-gcc (GCC) 11.2.0
reproduce (this is a W=1 build):
        wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
        chmod +x ~/bin/make.cross
        # https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git/commit/?id=b25656716807e99cddba033240a0c000ac9da02a
        git remote add jirislaby https://git.kernel.org/pub/scm/linux/kernel/git/jirislaby/linux.git
        git fetch --no-tags jirislaby devel
        git checkout b25656716807e99cddba033240a0c000ac9da02a
        # save the attached .config to linux build tree
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-11.2.0 make.cross ARCH=mips 

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@xxxxxxxxx>

All errors (new ones prefixed by >>):

   drivers/tty/rpmsg_tty.c: In function 'rpmsg_tty_cb':
>> drivers/tty/rpmsg_tty.c:42:9: error: implicit declaration of function 'tty_flip_buffer_push' [-Werror=implicit-function-declaration]
      42 |         tty_flip_buffer_push(&cport->port);
         |         ^~~~~~~~~~~~~~~~~~~~
   cc1: some warnings being treated as errors


vim +/tty_flip_buffer_push +42 drivers/tty/rpmsg_tty.c

7c0408d8057971 Arnaud Pouliquen 2021-10-15  31  
7c0408d8057971 Arnaud Pouliquen 2021-10-15  32  static int rpmsg_tty_cb(struct rpmsg_device *rpdev, void *data, int len, void *priv, u32 src)
7c0408d8057971 Arnaud Pouliquen 2021-10-15  33  {
7c0408d8057971 Arnaud Pouliquen 2021-10-15  34  	struct rpmsg_tty_port *cport = dev_get_drvdata(&rpdev->dev);
7c0408d8057971 Arnaud Pouliquen 2021-10-15  35  	int copied;
7c0408d8057971 Arnaud Pouliquen 2021-10-15  36  
7c0408d8057971 Arnaud Pouliquen 2021-10-15  37  	if (!len)
7c0408d8057971 Arnaud Pouliquen 2021-10-15  38  		return -EINVAL;
7c0408d8057971 Arnaud Pouliquen 2021-10-15  39  	copied = tty_insert_flip_string(&cport->port, data, len);
7c0408d8057971 Arnaud Pouliquen 2021-10-15  40  	if (copied != len)
7c0408d8057971 Arnaud Pouliquen 2021-10-15  41  		dev_err_ratelimited(&rpdev->dev, "Trunc buffer: available space is %d\n", copied);
7c0408d8057971 Arnaud Pouliquen 2021-10-15 @42  	tty_flip_buffer_push(&cport->port);
7c0408d8057971 Arnaud Pouliquen 2021-10-15  43  
7c0408d8057971 Arnaud Pouliquen 2021-10-15  44  	return 0;
7c0408d8057971 Arnaud Pouliquen 2021-10-15  45  }
7c0408d8057971 Arnaud Pouliquen 2021-10-15  46  

:::::: The code at line 42 was first introduced by commit
:::::: 7c0408d805797178f075f33d0f705a1c6ef76c82 tty: add rpmsg driver

:::::: TO: Arnaud Pouliquen <arnaud.pouliquen@xxxxxxxxxxx>
:::::: CC: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx

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