Comment 7 for bug 1874057

With the patch applied the compile complains with:
...
  CC mm/vmalloc.o
^[[01m^[[K/home/ubuntu/focal-lp1874057/arch/s390/pci/pci.c:^[[m^[[K In function ‘^[[01m^[[Kzpci_alloc_domain^[[m^[[K’:
^[[01m^[[K/home/ubuntu/focal-lp1874057/arch/s390/pci/pci.c:668:4:^[[m^[[K ^[[01;31m^[[Kerror: ^[[m^[[Kimplicit declaration of function ‘^[[01m^[[Kupdate_uid_checking^[[m^[[K’ [^[[01;31m^[[K-Werror=implicit-function-declaration^[[m^[[K]
  668 | ^[[01;31m^[[Kupdate_uid_checking^[[m^[[K(false);
      | ^[[01;31m^[[K^~~~~~~~~~~~~~~~~~~^[[m^[[K
  CC mm/process_vm_access.o
  CC security/apparmor/lib.o
cc1: some warnings being treated as errors
make[4]: *** [/home/ubuntu/focal-lp1874057/scripts/Makefile.build:273: arch/s390/pci/pci.o] Error 1
make[3]: *** [/home/ubuntu/focal-lp1874057/scripts/Makefile.build:522: arch/s390/pci] Error 2
make[2]: *** [/home/ubuntu/focal-lp1874057/Makefile:1719: arch/s390] Error 2

I double-checked with compiling the focal master-next tree w/o the patch, which works fine.