Comment 8 for bug 1543919

I've an emachines®/acer® EL1210-09 (Advance Micro Devices Inc. Athlon LE-1620 (P/N ADH1620IAA5DH); nVIDIA® nForce® 780a SLI with planar C77 a2 GPU; nVIDIA® GF119 a1 GPU on PCIe 2.0 x16 slot). The system DMesg predictably detects no EISA resources on probing platform eisa.0, so EISA.c and related headers can be compiled as a module with no effect on my system's kernel initialization. AFAIK, Intel PCI has replaced EISA on all x86 and x86_64 systems built after 2000. The following redact from /var/log/dmesg.0 on 17 July 2021 illustrates typical info:

[ 0.000000] kernel: Linux version 5.8.0-59-generic (buildd@lcy01-amd64-022) (gcc (Ubuntu 9.3.0-17ubuntu1~20.04) 9.3.0, GNU ld (GNU Binutils for Ubuntu) 2.34) #66~20.04.1-Ubuntu SMP Thu Jun 17 11:14:10 UTC 2021 (Ubuntu 5.8.0-59.66~20.04.1-generic 5.8.18)
[ 0.000000] kernel: Command line: BOOT_IMAGE=/vmlinuz-5.8.0-59-generic root=UUID=c4248af1-a4cf-49a2-ba18-4de2c65c815c ro acpi_force_32bit_fadt_addr acpi_rev_override check_enable_amd_mmconf pcie_bus_tune=off pcie_aspm=off pci_ports=native intremap=off agp=off nohugeiomap parport=0 hashdist=0
...
[ 0.212298] kernel: EISA bus registered
...
[ 1.006643] kernel: platform eisa.0: Probing EISA bus 0
[ 1.006715] kernel: platform eisa.0: EISA: Cannot allocate resource for mainboard
[ 1.006779] kernel: platform eisa.0: Cannot allocate resource for EISA slot 1
[ 1.006855] kernel: platform eisa.0: Cannot allocate resource for EISA slot 8
[ 1.006917] kernel: platform eisa.0: EISA: Detected 0 cards

I concur on the feasibility of offloading EISA from Kernel core and building a Module EISA.ko.