oss4-dkms fails to build when CONFIG_USB/CFG80211 is disabled

[Roxana Nicolescu]

SRU justification:

[Impact]

This is encountered on linux kernel derivatives with fewer configuration options enabled.
First time saw on jammy:linux-kvm-1029.

During build, it fails with the following error:

...
ERROR: modpost: "wiphy_free" [/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/8812au.ko] undefined!
ERROR: modpost: "cfg80211_unlink_bss" [/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/8812au.ko] undefined!
ERROR: modpost: "cfg80211_connect_done" [/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/8812au.ko] undefined!
ERROR: modpost: "usb_kill_urb" [/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/8812au.ko] undefined!
ERROR: modpost: "cfg80211_mgmt_tx_status" [/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/8812au.ko] undefined!
ERROR: modpost: "cfg80211_vendor_cmd_reply" [/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/8812au.ko] undefined!
ERROR: modpost: "ieee80211_freq_khz_to_channel" [/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/8812au.ko] undefined!
ERROR: modpost: "cfg80211_get_bss" [/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/8812au.ko] undefined!
ERROR: modpost: "usb_deregister" [/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/8812au.ko] undefined!
ERROR: modpost: "wiphy_unregister" [/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/8812au.ko] undefined!
WARNING: modpost: suppressed 29 unresolved symbol warnings because there were too many)
make[2]: *** [scripts/Makefile.modpost:133: /var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/Module.symvers] Error 1
make[2]: *** Deleting file '/var/lib/dkms/rtl8812au/4.3.8.12175.20140902+dfsg/build/Module.symvers'
make[1]: *** [Makefile:1821: modules] Error 2
make[1]: Leaving directory '/usr/src/linux-headers-5.15.0-1029-kvm'
make: *** [Makefile:1457: modules] Error 2

because CONFIG_USB=n, CONFIG_CFG80211=n

[Fix]
Add a rule to build oss4 when CONFIG_USB=y/m and CONFIG_CFG80211=y/m.
BUILD_EXCLUSIVE_CONFIG should be used.

[Test Plan]
1.For lunar and mantic:
 Install a new version of linux-kvm
apt install oss4 will fail as described above.
After the fix, it will not be built at all.
2. In #2011551 the bug was solved for jammy, but BUILD_EXCLUISVE_KERNEL instead of BUILD_EXCLUSIVE_CONFIG was used instead.
For jammy it should not be built with both previous version and this version. Try with linux-kvm as well.

Once packages are in proposed, a new adt is triggered against proposed for mantic/lunar/jammy:linux-kvm.

[Where problems could occur]
Low possibility of new issues.

[Note]
This fix is not scalable in the sense that if configuration name changes, the module has to be changed as well.

[Roxana Nicolescu (roxanan)]

Mantic, lunar and jammy fixes are attached.
Tested locally on kvm instances when possible (for jammy and lunar only) because kvm does not have these config options enabled.

Results:
1. lunar:linux-kvm-6.2.0-1029

$ dpkg -i oss4-dkms_4.2-build2020-1ubuntu2_amd64.deb
(Reading database ... 133994 files and directories currently installed.)
Preparing to unpack oss4-dkms_4.2-build2020-1ubuntu2_amd64.deb ...
Deleting module oss4-4.2-build2020 completely from the DKMS tree.
Unpacking oss4-dkms (4.2-build2020-1ubuntu2) over (4.2-build2020-1ubuntu2) ...
Setting up oss4-dkms (4.2-build2020-1ubuntu2) ...
Loading new oss4-4.2-build2020 DKMS files...
Building for 6.2.0-1009-kvm
Building initial module for 6.2.0-1009-kvm
Error! The /var/lib/dkms/oss4/4.2-build2020/6.2.0-1009-kvm/x86_64/dkms.conf for module oss4 includes a BUILD_EXCLUSIVE directive which does not match this kernel/arch/config.
This indicates that it should not be built.
Skipped.

2. jammy:linux-kvm-5.15.0-1038
$ dpkg -i oss4-dkms_4.2-build2010-5ubuntu9.3_amd64.deb
...
make -j1 KERNELRELEASE=5.15.0-1038-kvm -C /lib/modules/5.15.0-1038-kvm/build M=/var/lib/dkms/oss4/4.2-build2010/build/core modules && make -C /var/lib/dkms/oss4/4.2-build2010/build/drivers osscore_symbols.inc && make -C /lib/modules/5.15.0-1038-kvm/build M=/var/lib/dkms/oss4/4.2-build2010/build/drivers modules..............(bad exit status: 2)
Error! Bad return status for module build on kernel: 5.15.0-1038-kvm (x86_64)
Consult /var/lib/dkms/oss4/4.2-build2010/build/make.log for more information.
Error! The /var/lib/dkms/rtl8821ce/5.5.2.1/5.15.0-1038-kvm/x86_64/dkms.conf for module rtl8821ce includes a BUILD_EXCLUSIVE directive which does not match this kernel/arch.
This indicates that it should not be built.

3. mantic:linux latest 6.4 kernel
Kvm is no longer a derivative for mantic, but tested this patch on the main linux to make sure it does not have a negative impact
dkms autoinstall on 6.4.0-1-generic/x86_64 succeeded for oss4
   ...done.

[Brian Murray (brian-murray)]

Ubuntu 23.04 (Lunar Lobster) has reached end of life, so this bug will not be fixed for that specific release.