Kernel module not found when compile: Skipping BTF generation

[richiewu]

Skipping BTF generation for /root/r8152-2.15.0/r8152.ko due to unavailability of vmlinux

it's searching /lib/modules/$(shell uname -r)/build

I alrady installed header file pve-headers-5.4.128-1-pve

and there is /sys/kernel/btf/vmlinux, should I use this one?

 

[t.lamprecht]

1. What OOT kernel module are you building and how?
2. Do you need BTF info?

 

[richiewu]

I tried install https://www.realtek.com/en/directly-download?downloadid=14693064993b470514fcf9f45f2442e5

It's RTL8156 2.5G USB ethernet driver, because I use lsusb got:
Bus 004 Device 005: ID 0bda:8151 Realtek Semiconductor Corp. RTL8151 Adapteon Business Mobile Networks BV

the device ID is not correct, so I try to install drivers to fix this problem, the correct one shoud be 0bda:8156
sometimes if I plug out and plug in again, lsusb got correct device ID

just use make && make install then got this error

and dmesg got:
[ 4.959995] usb 4-2: New USB device found, idVendor=0bda, idProduct=8151, bcdDevice=30.00

 

[richiewu]

anyone know the reason?

 

[richiewu]

Seems I solved this problem

apt install dwarves
apt install pve-headers-5.11.22-1-pve/now build-essential dkms
cp /sys/kernel/btf/vmlinux /usr/lib/modules/`uname -r`/build/

#install by compile
make
make install
mkdir -p /lib/modules/`uname -r`/kernel/net/usb
cp /root/r8152-2.15.0/r8152.ko /lib/modules/`uname -r`/kernel/net/usb/
make install_rules
depmod -a
update-initramfs -u

#install by dkms
dkms add -m r8125 -v 2.15.0
dkms build -m r8125 -v 2.15.0
dkms install -m r8125 -v 2.15.0
depmod -a
modprobe r8125

#load for reboot
echo "r8152" | sudo tee /etc/modules-load.d/r8152.conf

#reboot and check
lsmod | grep 'r8152'