issue with videobuf2-dma-sg.ko

[Vincent McIntyre <vincent.mcintyre@gmail.com>]

Hi

I am trying to load the cx23885 module. It fails to load and I get this in dmesg;

  [  433.506983] videobuf2_dma_sg: Unknown symbol dma_buf_export (err 0)

I wrote a small script to load each of the dependencies one at a time,
which shows pretty clearly the problem is videobuf2-dma-sg.ko.

I am up to date with the media_tree:
  $ git log |head
  commit 59366d3bbae4f67ae3b3a32696faa0798cef1b67
  Author: Hans Verkuil <hans.verkuil@cisco.com>
  Date:   Sat May 2 10:41:49 2015 +0200

      v4l/compat.h: fix compiler warning

      In file included from <command-line>:0:0:
      v4l/compat.h:1605:11: warning: 'struct device_node' declared inside parameter list
                 u64 *out_values, size_t sz)
       	              ^

Can anyone point out how to fix this?
What other information would be useful?
Cheers
Vince

System details

  $ uname -a
  Linux ubuntu 3.13.0-51-generic #84-Ubuntu SMP Wed Apr 15 12:11:46 UTC 2015 i686 i686 i686 GNU/Linux
  
  $ sudo sh load.sh
  videobuf2_core 3
  videodev 2
  rc_core 1
  altera_ci 0
  modprobe -v altera_ci
  insmod /lib/modules/3.13.0-51-generic/kernel/drivers/media/pci/cx23885/altera-ci.ko
  v4l2_common 2
  snd_pcm 4
  snd 17
  tveeprom 0
  modprobe -v tveeprom
  insmod /lib/modules/3.13.0-51-generic/kernel/drivers/media/common/tveeprom.ko
  cx2341x 0
  modprobe -v cx2341x
  insmod /lib/modules/3.13.0-51-generic/kernel/drivers/media/common/cx2341x.ko
  videobuf2_dma_sg 0
  modprobe -v videobuf2_dma_sg
  insmod /lib/modules/3.13.0-51-generic/kernel/drivers/media/v4l2-core/videobuf2-dma-sg.ko
  modprobe: ERROR: could not insert 'videobuf2_dma_sg': Unknown symbol in module, or unknown parameter (see dmesg)
  videobuf2_dvb 0
  modprobe -v videobuf2_dvb
  insmod /lib/modules/3.13.0-51-generic/kernel/drivers/media/v4l2-core/videobuf2-dvb.ko
  dvb_core 2
  tda18271 0
  modprobe -v tda18271
  insmod /lib/modules/3.13.0-51-generic/kernel/drivers/media/tuners/tda18271.ko
  altera_stapl 0
  modprobe -v altera_stapl
  insmod /lib/modules/3.13.0-51-generic/kernel/drivers/misc/altera-stapl/altera-stapl.ko
  cx23885 0
  modprobe -v cx23885
  insmod /lib/modules/3.13.0-51-generic/kernel/drivers/media/v4l2-core/videobuf2-dma-sg.ko
  modprobe: ERROR: could not insert 'cx23885': Unknown symbol in module, or unknown parameter (see dmesg)
  
  $ dmesg|tail
  [   38.177893] nvidia 0000:01:00.0: irq 43 for MSI/MSI-X
  [   39.350957] init: plymouth-upstart-bridge main process ended, respawning
  [   39.390535] init: plymouth-upstart-bridge main process (1381) terminated with status 1
  [   39.390563] init: plymouth-upstart-bridge main process ended, respawning
  [   56.994291] audit_printk_skb: 123 callbacks suppressed
  [   56.994298] type=1400 audit(1430633192.185:74): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/lib/cups/backend/cups-pdf" pid=2295 comm="apparmor_parser"
  [   56.994310] type=1400 audit(1430633192.185:75): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=2295 comm="apparmor_parser"
  [   56.994991] type=1400 audit(1430633192.185:76): apparmor="STATUS" operation="profile_replace" profile="unconfined" name="/usr/sbin/cupsd" pid=2295 comm="apparmor_parser"
  [  122.119702] videobuf2_dma_sg: Unknown symbol dma_buf_export (err 0)
  [  122.243021] videobuf2_dma_sg: Unknown symbol dma_buf_export (err 0)
  
  
  
  $ cat load.sh
  #!/bin/sh
  for m in videobuf2_core videodev rc_core altera_ci v4l2_common snd_pcm snd tveeprom cx2341x videobuf2_dma_sg videobuf2_dvb dvb_core tda18271 altera_stapl cx23885
  do
      n=`lsmod|grep -F $m -c`
      echo $m $n
      [ $n -eq 0 ] || continue
      echo modprobe -v $m
      modprobe -v $m
  done