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RPi-Distro / rpi-source

Raspberry Pi kernel source installer
MIT License
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Add support for 64-bit kernels #22

Open Zahrun opened 12 months ago

Zahrun commented 12 months ago

I had trouble compiling a kernel module with errors along these lines:

ERROR: modpost: "__const_udelay" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "__arch_copy_from_user" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "_raw_spin_unlock" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "__rcu_read_lock" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "__rcu_read_unlock" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "cpu_hwcap_keys" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "csum_ipv6_magic" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "__warn_printk" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "arm64_const_caps_ready" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "__udelay" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "preempt_schedule_notrace" [/home/pi/rtl8812au/88XXau.ko] undefined!
ERROR: modpost: "__arch_copy_to_user" [/home/pi/rtl8812au/88XXau.ko] undefined!

I found out from https://github.com/aircrack-ng/rtl8812au/issues/933 that rpi-source does not support 64-bit kernels. I was able to compile the module properly by using the rpi-source from https://github.com/RPi-Distro/rpi-source/pull/2. Since that was not merged, and the issue still persists, and to give more visibility to anyone who might face the same thing, I open this issue here. It might be worthwhile to indicate in README.md that rpi-source does not support 64-bit kernels.