Module symbols getting errors of undefined

[mdbananapi]

Hi!

I try to compile the module on a linux 3.19.3 kernel debian, but when I try to build it I get the following errors:
WARNING: "vb2_ioctl_reqbufs" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "v4l2_event_unsubscribe" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "video_device_release_empty" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "v4l2_i2c_new_subdev" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "v4l2_ctrl_log_status" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "snd_pcm_period_elapsed" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "v4l2_device_unregister" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "v4l2_ctrl_handler_free" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "vb2_fop_poll" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "vb2_ioctl_streamon" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "vb2_ops_wait_prepare" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "__video_register_device" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "snd_pcm_stream_lock" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "snd_pcm_hw_constraint_integer" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "v4l2_device_register" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "vb2_fop_read" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "v4l2_device_disconnect" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "vb2_vmalloc_memops" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "vb2_fop_mmap" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "vb2_ioctl_qbuf" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "video_unregister_device" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "snd_pcm_set_ops" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "v4l2_ctrl_subscribe_event" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "vb2_plane_vaddr" [/home/user1/smi2021-master/smi2021.ko] undefined!
etc.

They all look like this.

I have read on some threads that this is somehow related to system variables?
http://stackoverflow.com/questions/625685/linux-kernel-module-linker-warnings-warning-function-module-undefin
http://stackoverflow.com/questions/28125158/warning-linux-kernel-module-functions-undefined

I also do depmod after copying the newly created ko driver, but after I do the modprobe smi2021 I get error:
ERROR: could not insert 'smi2021': Exec format error

Can you please help me to install it? I follow all the steps that you wrote in read me.

Thanks!

[mastervolkov]

Can you try build by these instruction?https://github.com/Manouchehri/smi2021

[mdbananapi]

Hi!

Thank you very much for your comment and sorry for my late reply.

I followed instructions from https://github.com/Manouchehri/smi2021 but I still got the Warning messages when compiling the module and when I tried to load the module via mod probe I also got the error: ERROR: could not insert 'smi2021': Exec format error

P.S. I am using kernel 3.19.3 Debian on a banana pi.

Here is step by step what I did:

1. git clone git://github.com/Manouchehri/smi2021.git
2. cd smi2021/
3. sed -i '0,/obj/{s/$(CONFIG_VIDEO_SMI2021)/m/}' Makefile # Force building as a module.
4. make -C /lib/modules/$(uname -r)/build M=$PWD modules

Here I got the undefined warnings:
WARNING: "vb2_ioctl_reqbufs" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "v4l2_event_unsubscribe" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "video_device_release_empty" [/home/user1/smi2021-master/smi2021.ko] undefined!
WARNING: "v4l2_i2c_new_subdev" [/home/user1/smi2021-master/smi2021.ko] undefined!
... and much more warnings like this.

1. mkdir /lib/modules/uname -r/kernel/drivers/media/usb/smi2021
2. sudo install -Dm644 smi2021.ko mkdir /lib/modules/uname -r/kernel/drivers/media/usb/smi2021
3. rmmod smi2021
   I get: Error: Module smi2021 is not currently loaded
4. modprobe smi2021
   I get: ERROR: could not insert 'smi2021': Exec format error

Can you please tell me what to do?

[mdbananapi]

P.S. I forgot to tell you that in my lib/firmware I have 2 firmware for the somagic:
smi2021_3f.bin and somagic_firmware.bin

Yhey both have 6.5 KB and I extracted them using the following steps:
https://code.google.com/p/easycap-somagic-linux/wiki/GettingStarted#Extracting_firmware