[Buildroot] Kernel module compiled but not found

Yann E. MORIN yann.morin.1998 at free.fr
Sun Oct 13 15:56:20 UTC 2013


Marco,

On 2013-10-13 16:29 +0200, Marco Trapanese spake thusly:
> Hello,
> I read the official documentation and this tutorial:
> 
> http://blog.willygroup.org/buildroot-aggiungere-modulo-al-kernel.html#fn-729-1
> 
> to add a custom kernel module.
> It seems it is successfully compiled but I cannot find the .ko file in the
> Buildroot tree.
> This is the relevant output:
> 
> >>> sensoray2253 1.2.6 Building
> /usr/bin/make -j5
> HOSTCC="/home/mark/dev/rpiqt5/buildroot-rpi/output/host/usr/bin/ccache
> /usr/bin/gcc" HOSTCFLAGS="" ARCH=arm
> INSTALL_MOD_PATH=/home/mark/dev/rpiqt5/buildroot-rpi/output/target
> CROSS_COMPILE="/home/mark/dev/rpiqt5/buildroot-rpi/output/host/usr/bin/ccache /home/mark/dev/rpiqt5/buildroot-rpi/output/host/usr/bin/arm-buildroot-linux-gnueabi-"
> DEPMOD=/home/mark/dev/rpiqt5/buildroot-rpi/output/host/usr/sbin/depmod -C
> /home/mark/dev/rpiqt5/buildroot-rpi/output/build/linux-custom
> M=/home/mark/dev/rpiqt5/buildroot-rpi/output/build/sensoray2253-1.2.6
> modules
> make[1]: Entering directory
> `/home/mark/dev/rpiqt5/buildroot-rpi/output/build/linux-custom'
>   Building modules, stage 2.
>   MODPOST 0 modules
> make[1]: Leaving directory
> `/home/mark/dev/rpiqt5/buildroot-rpi/output/build/linux-custom'
> >>> sensoray2253 1.2.6 Installing to target
> /usr/bin/make -j5
> HOSTCC="/home/mark/dev/rpiqt5/buildroot-rpi/output/host/usr/bin/ccache
> /usr/bin/gcc" HOSTCFLAGS="" ARCH=arm
> INSTALL_MOD_PATH=/home/mark/dev/rpiqt5/buildroot-rpi/output/target
> CROSS_COMPILE="/home/mark/dev/rpiqt5/buildroot-rpi/output/host/usr/bin/ccache /home/mark/dev/rpiqt5/buildroot-rpi/output/host/usr/bin/arm-buildroot-linux-gnueabi-"
> DEPMOD=/home/mark/dev/rpiqt5/buildroot-rpi/output/host/usr/sbin/depmod -C
> /home/mark/dev/rpiqt5/buildroot-rpi/output/build/linux-custom
> M=/home/mark/dev/rpiqt5/buildroot-rpi/output/build/sensoray2253-1.2.6
> modules_install
> make[1]: Entering directory
> `/home/mark/dev/rpiqt5/buildroot-rpi/output/build/linux-custom'
>   DEPMOD  3.9.11
> make[1]: Leaving directory
> `/home/mark/dev/rpiqt5/buildroot-rpi/output/build/linux-custom'
> mkdir -p /home/mark/dev/rpiqt5/buildroot-rpi/output/target/etc
> echo "rpi" > /home/mark/dev/rpiqt5/buildroot-rpi/output/target/etc/hostname
> 
> 
> As you can see, there are no errors but I'm not sure the module is correctly
> installed!
> According to the tutorial I should find it in:
> 
> buildroot_folder/output/target/lib/modules/kernel_version/extra/
> 
> but mine is empty.

Have you checked it does not end in another directory beside 'extra'?
    find output/target/lib/modules/kernel_version/extra/ |grep 'your-module.ko'

Regards,
Yann E. MORIN.

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