Hi Xie, Thank you for the patch! Perhaps something to improve: [auto build test WARNING on char-misc/char-misc-testing] [also build test WARNING on v5.13-rc3 next-20210525] [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/Xie-Yongji/virtio_console-Assure-used-length-from-device-is-limited/20210525-125848 base: https://git.kernel.org/pub/scm/linux/kernel/git/gregkh/char-misc.git 281e468446994a7672733af2bf941f4110d4a895 config: x86_64-randconfig-s022-20210525 (attached as .config) compiler: gcc-9 (Debian 9.3.0-22) 9.3.0 reproduce: # apt-get install sparse # sparse version: v0.6.3-341-g8af24329-dirty # https://github.com/0day-ci/linux/commit/edaca17a036c98c3e0f6953318976caff7168a6e git remote add linux-review https://github.com/0day-ci/linux git fetch --no-tags linux-review Xie-Yongji/virtio_console-Assure-used-length-from-device-is-limited/20210525-125848 git checkout edaca17a036c98c3e0f6953318976caff7168a6e # save the attached .config to linux build tree make W=1 C=1 CF='-fdiagnostic-prefix -D__CHECK_ENDIAN__' W=1 ARCH=x86_64 If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp@xxxxxxxxx> sparse warnings: (new ones prefixed by >>) >> drivers/char/virtio_console.c:478:28: sparse: sparse: incompatible types in comparison expression (different type sizes): >> drivers/char/virtio_console.c:478:28: sparse: unsigned int * >> drivers/char/virtio_console.c:478:28: sparse: unsigned long * drivers/char/virtio_console.c:1712:28: sparse: sparse: incompatible types in comparison expression (different type sizes): drivers/char/virtio_console.c:1712:28: sparse: unsigned int * drivers/char/virtio_console.c:1712:28: sparse: unsigned long * vim +478 drivers/char/virtio_console.c 466 467 /* Callers should take appropriate locks */ 468 static struct port_buffer *get_inbuf(struct port *port) 469 { 470 struct port_buffer *buf; 471 unsigned int len; 472 473 if (port->inbuf) 474 return port->inbuf; 475 476 buf = virtqueue_get_buf(port->in_vq, &len); 477 if (buf) { > 478 buf->len = min(len, buf->size); 479 buf->offset = 0; 480 port->stats.bytes_received += len; 481 } 482 return buf; 483 } 484 --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@xxxxxxxxxxxx
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