Hi Hans, FYI, the error/warning still remains. tree: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master head: 3664ce2d930983966d2aac0e167f1332988c4e25 commit: 7952be9b6ece3d3c4d61f9811d7e5a984580064a media: drivers/media/common/videobuf2: rename from videobuf date: 5 weeks ago config: x86_64-randconfig-r0-02260008 (attached as .config) compiler: gcc-6 (Debian 6.4.0-9) 6.4.0 20171026 reproduce: git checkout 7952be9b6ece3d3c4d61f9811d7e5a984580064a # save the attached .config to linux build tree make ARCH=x86_64 All errors (new ones prefixed by >>): drivers/media/common/videobuf2/videobuf2-core.o: In function `vb2_core_streamon': >> drivers/media/common/videobuf2/videobuf2-core.c:1737: undefined reference to `v4l_vb2q_enable_media_source' drivers/media/common/videobuf2/videobuf2-v4l2.o: In function `vb2_poll': drivers/media/common/videobuf2/videobuf2-v4l2.c:678: undefined reference to `video_devdata' drivers/media/common/videobuf2/videobuf2-v4l2.c:685: undefined reference to `v4l2_event_pending' drivers/media/common/videobuf2/videobuf2-v4l2.o: In function `vb2_ioctl_reqbufs': drivers/media/common/videobuf2/videobuf2-v4l2.c:714: undefined reference to `video_devdata' drivers/media/common/videobuf2/videobuf2-v4l2.o: In function `vb2_ioctl_create_bufs': drivers/media/common/videobuf2/videobuf2-v4l2.c:733: undefined reference to `video_devdata' drivers/media/common/videobuf2/videobuf2-v4l2.o: In function `vb2_ioctl_prepare_buf': drivers/media/common/videobuf2/videobuf2-v4l2.c:759: undefined reference to `video_devdata' drivers/media/common/videobuf2/videobuf2-v4l2.o: In function `vb2_ioctl_querybuf': drivers/media/common/videobuf2/videobuf2-v4l2.c:769: undefined reference to `video_devdata' drivers/media/common/videobuf2/videobuf2-v4l2.o: In function `vb2_ioctl_qbuf': drivers/media/common/videobuf2/videobuf2-v4l2.c:778: undefined reference to `video_devdata' drivers/media/common/videobuf2/videobuf2-v4l2.o:drivers/media/common/videobuf2/videobuf2-v4l2.c:788: more undefined references to `video_devdata' follow drivers/media/common/videobuf2/videobuf2-v4l2.o: In function `_vb2_fop_release': drivers/media/common/videobuf2/videobuf2-v4l2.c:848: undefined reference to `v4l2_fh_release' vim +1737 drivers/media/common/videobuf2/videobuf2-core.c bd323e28b drivers/media/video/videobuf2-core.c Marek Szyprowski 2011-08-29 1706 3c5be988e drivers/media/v4l2-core/videobuf2-core.c Junghak Sung 2015-10-06 1707 int vb2_core_streamon(struct vb2_queue *q, unsigned int type) e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1708 { 5db2c3ba4 drivers/media/video/videobuf2-core.c Pawel Osciak 2011-03-20 1709 int ret; e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1710 e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1711 if (type != q->type) { fd4354cf5 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-04-07 1712 dprintk(1, "invalid stream type\n"); e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1713 return -EINVAL; e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1714 } e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1715 e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1716 if (q->streaming) { fd4354cf5 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-04-07 1717 dprintk(3, "already streaming\n"); f956035ce drivers/media/v4l2-core/videobuf2-core.c Ricardo Ribalda Delgado 2013-11-08 1718 return 0; e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1719 } e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1720 548df7831 drivers/media/v4l2-core/videobuf2-core.c Ricardo Ribalda Delgado 2014-01-08 1721 if (!q->num_buffers) { fd4354cf5 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-04-07 1722 dprintk(1, "no buffers have been allocated\n"); 548df7831 drivers/media/v4l2-core/videobuf2-core.c Ricardo Ribalda Delgado 2014-01-08 1723 return -EINVAL; 548df7831 drivers/media/v4l2-core/videobuf2-core.c Ricardo Ribalda Delgado 2014-01-08 1724 } 548df7831 drivers/media/v4l2-core/videobuf2-core.c Ricardo Ribalda Delgado 2014-01-08 1725 b3379c620 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-02-24 1726 if (q->num_buffers < q->min_buffers_needed) { fd4354cf5 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-04-07 1727 dprintk(1, "need at least %u allocated buffers\n", b3379c620 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-02-24 1728 q->min_buffers_needed); b3379c620 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-02-24 1729 return -EINVAL; b3379c620 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-02-24 1730 } 249f5a58b drivers/media/v4l2-core/videobuf2-core.c Ricardo Ribalda Delgado 2014-01-08 1731 e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1732 /* b3379c620 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-02-24 1733 * Tell driver to start streaming provided sufficient buffers b3379c620 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-02-24 1734 * are available. e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1735 */ b3379c620 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-02-24 1736 if (q->queued_count >= q->min_buffers_needed) { 77fa4e072 drivers/media/v4l2-core/videobuf2-core.c Shuah Khan 2016-02-11 @1737 ret = v4l_vb2q_enable_media_source(q); 77fa4e072 drivers/media/v4l2-core/videobuf2-core.c Shuah Khan 2016-02-11 1738 if (ret) 77fa4e072 drivers/media/v4l2-core/videobuf2-core.c Shuah Khan 2016-02-11 1739 return ret; 02f142ecd drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2013-12-13 1740 ret = vb2_start_streaming(q); 5db2c3ba4 drivers/media/video/videobuf2-core.c Pawel Osciak 2011-03-20 1741 if (ret) { bd323e28b drivers/media/video/videobuf2-core.c Marek Szyprowski 2011-08-29 1742 __vb2_queue_cancel(q); 5db2c3ba4 drivers/media/video/videobuf2-core.c Pawel Osciak 2011-03-20 1743 return ret; 5db2c3ba4 drivers/media/video/videobuf2-core.c Pawel Osciak 2011-03-20 1744 } b3379c620 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-02-24 1745 } 5db2c3ba4 drivers/media/video/videobuf2-core.c Pawel Osciak 2011-03-20 1746 5db2c3ba4 drivers/media/video/videobuf2-core.c Pawel Osciak 2011-03-20 1747 q->streaming = 1; e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1748 fd4354cf5 drivers/media/v4l2-core/videobuf2-core.c Hans Verkuil 2014-04-07 1749 dprintk(3, "successful\n"); e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1750 return 0; e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1751 } 3c5be988e drivers/media/v4l2-core/videobuf2-core.c Junghak Sung 2015-10-06 1752 EXPORT_SYMBOL_GPL(vb2_core_streamon); e23ccc0ad drivers/media/video/videobuf2-core.c Pawel Osciak 2010-10-11 1753 :::::: The code at line 1737 was first introduced by commit :::::: 77fa4e072998705883c4dc672963b4bf7483cea9 [media] media: Change v4l-core to check if source is free :::::: TO: Shuah Khan <shuahkh@xxxxxxxxxxxxxxx> :::::: CC: Mauro Carvalho Chehab <mchehab@xxxxxxxxxxxxxxx> --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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