Re: [PATCH 1/2] tty: hvc: pass DMA capable memory to put_chars()

Hi Xianting,

Thank you for the patch! Yet something to improve:

[auto build test ERROR on tty/tty-testing]
[also build test ERROR on char-misc/char-misc-testing soc/for-next linus/master v5.14-rc3 next-20210730]
[If your patch is applied to the wrong git tree, kindly drop us a note.
And when submitting patch, we suggest to use '--base' as documented in
https://git-scm.com/docs/git-format-patch]

url:    https://github.com/0day-ci/linux/commits/Xianting-Tian/tty-hvc-pass-DMA-capable-memory-to-put_chars/20210801-131800
base:   https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/tty.git tty-testing
config: sparc64-allyesconfig (attached as .config)
compiler: sparc64-linux-gcc (GCC) 10.3.0
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://github.com/0day-ci/linux/commit/b33d1f04db78e1bfa5d798b676bd1062e2d54afc
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Xianting-Tian/tty-hvc-pass-DMA-capable-memory-to-put_chars/20210801-131800
        git checkout b33d1f04db78e1bfa5d798b676bd1062e2d54afc
        # save the attached .config to linux build tree
        mkdir build_dir
        COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-10.3.0 make.cross O=build_dir ARCH=sparc64 SHELL=/bin/bash

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

All errors (new ones prefixed by >>):

   drivers/tty/hvc/hvc_console.c: In function 'hvc_poll_put_char':

quoted

drivers/tty/hvc/hvc_console.c:888:14: error: 'ch' redeclared as different kind of symbol

     888 |  static char ch = ch;
         |              ^~
   drivers/tty/hvc/hvc_console.c:883:73: note: previous definition of 'ch' was here
     883 | static void hvc_poll_put_char(struct tty_driver *driver, int line, char ch)
         |                                                                    ~~~~~^~

quoted

drivers/tty/hvc/hvc_console.c:888:19: error: initializer element is not constant

     888 |  static char ch = ch;
         |                   ^~


vim +/ch +888 drivers/tty/hvc/hvc_console.c

   882	
   883	static void hvc_poll_put_char(struct tty_driver *driver, int line, char ch)
   884	{
   885		struct tty_struct *tty = driver->ttys[0];
   886		struct hvc_struct *hp = tty->driver_data;
   887		int n;
 > 888		static char ch = ch;
   889	
   890		do {
   891			n = hp->ops->put_chars(hp->vtermno, &ch, 1);
   892		} while (n <= 0);
   893	}
   894	#endif
   895	

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