Error compiling on kernel 5.4.0-150

$ uname -r 5.4.0-150-generic $ git branch * kernel_5.2 kernel_5.6 master $ sudo dkms build -m ncpfs -v 2.2.6 Kernel preparation unnecessary for this kernel. Skipping... Building module: cleaning build area... KDIR=/lib/modules/5.4.0-150-generic/build MDIR=/lib/modules/5.4.0-150-generic make SKIP_STACK_VALIDATION=1...(bad exit status: 2) Error! Bad return status for module build on kernel: 5.4.0-150-generic (x86_64) Consult /var/lib/dkms/ncpfs/2.2.6/build/make.log for more information.

Because you have copied wrong branch to /usr/src/ncpfs-2.2.6, you now trying to compile the version for kernel >= 6.3. If you check your make.log you will see in example error /var/lib/dkms/ncpfs/2.2.6/build/dir.c:34:30: warning: ‘struct mnt_idmap’ declared inside parameter list will not be visible outside of this definition or declaration, but mnt_idmap was introduced in kernel_6.3.

Solution 1:

sudo -s
cd /usr/src/ncpfs*
git checkout kernel_5.2
dkms build -m ncpfs -v 2.2.6 && dkms install -m ncpfs -v 2.2.6 || true

Solution 2:

cd ~
sudo -s
rm /usr/src/ncpfs*
git clone https://github.com/EnzephaloN/ncpfs_dkms.git ncpfs
cp -r ncpfs /usr/src/ncpfs-2.2.6
dkms build -m ncpfs -v 2.2.6 && dkms install -m ncpfs -v 2.2.6 || true

EnzephaloN / ncpfs_dkms

Error compiling on kernel 5.4.0-150 #12