linux-5.4.46: Build IPMI drivers as modules

The IPMI drivers are not needed on all systems, and we try to avoid
that interface. This also resolves a conflict with other watchdog
timers.

    handsomejack:~$ dmesg --level=err
    [   11.618887] watchdog: iTCO_wdt: cannot register miscdev on minor=130 (err=-16).
    [   11.627956] watchdog: iTCO_wdt: a legacy watchdog module is probably present.
    handsomejack:~$ dmesg | grep -e iTCO -e watchdog
    [   11.603138] iTCO_wdt: Intel TCO WatchDog Timer Driver v1.11
    [   11.609888] iTCO_wdt: Found a Wellsburg TCO device (Version=2, TCOBASE=0x0460)
    [   11.618887] watchdog: iTCO_wdt: cannot register miscdev on minor=130 (err=-16).
    [   11.627956] watchdog: iTCO_wdt: a legacy watchdog module is probably present.
    [   11.636462] iTCO_wdt: initialized. heartbeat=30 sec (nowayout=0)
    [   11.643679] iTCO_vendor_support: vendor-support=0

The Linux error when shutting down *sympathyforthedevil* – not in the logs,
only on the monitor or the serial console – is also gone now, as the drivers
are not automatically loaded.

    [  189.063113] reboot: Power down
    [  189.068549] IPMI poweroff: Powering down via IPMI chassis control command
    [  189.075498] ------------[ cut here ]------------
    [  189.080259] sched: Unexpected reschedule of offline CPU#8!
    [  189.085898] WARNING: CPU: 0 PID: 1 at arch/x86/kernel/apic/ipi.c:67 native_smp_send_reschedule+0x34/0x40
    [  189.095605] Modules linked in: 8021q garp stp mrp llc amd64_edac_mod edac_mce_amd kvm_amd kvm input_leds led_class irqbypass ixgbe crc32c_intel acpi_cpufreq nfsd auth_rpcgss nfs_acl lockd grace sunrpc ip_tables x_tables unix ipv6 nf_defrag_ipv6 autofs4
    [  189.118332] CPU: 0 PID: 1 Comm: systemd-shutdow Not tainted 5.4.39.mx64.334 #1
    [  189.125774] Hardware name: Supermicro Super Server/H11DSU-iN, BIOS 1.3 01/30/2020
    [  189.133482] RIP: 0010:native_smp_send_reschedule+0x34/0x40
    [  189.139114] Code: 05 31 9c 52 01 73 15 48 8b 05 a8 7f 2d 01 be fd 00 00 00 48 8b 40 30 e9 6a 8b db 00 89 fe 48 c7 c7 20 9e 21 82 e8 5c 1d 02 00 <0f> 0b c3 66 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 48 8b 05 74 7f
    [  189.158198] RSP: 0018:ffffc9001892fbc8 EFLAGS: 00010086
    [  189.163571] RAX: 0000000000000000 RBX: ffff889faa6f5200 RCX: ffffffff82454348
    [  189.170858] RDX: 0000000000000001 RSI: 0000000000000092 RDI: ffffffff82b2cbec
    [  189.178139] RBP: 0000000000028b00 R08: 0000000000000796 R09: 0000000000000000
    [  189.185420] R10: ffffc9001892fbb8 R11: 00000000000000f0 R12: 0000000000000008
    [  189.192706] R13: 0000000000000000 R14: ffff889faa6f589c R15: 0000000000000046
    [  189.199988] FS:  00007f7a26e6f800(0000) GS:ffff889faec00000(0000) knlGS:0000000000000000
    [  189.208299] CS:  0010 DS: 0000 ES: 0000 CR0: 0000000080050033
    [  189.214192] CR2: 00007f950950c8a0 CR3: 000000ff9f3b4000 CR4: 00000000003406f0
    [  189.221473] Call Trace:
    [  189.224068]  try_to_wake_up+0x3bd/0x5a0
    [  189.228045]  check_start_timer_thread.part.12+0x2a/0x50
    [  189.233418]  sender+0x65/0x70
    [  189.236527]  i_ipmi_request+0x2de/0x9d0
    [  189.240507]  ipmi_request_supply_msgs+0x102/0x130
    [  189.245358]  ipmi_request_in_rc_mode+0x2f/0x80
    [  189.249944]  ipmi_poweroff_chassis+0xa0/0x110
    [  189.254452]  __do_sys_reboot+0x150/0x1e0
    [  189.258517]  ? do_writev+0xd8/0x120
    [  189.262146]  ? do_writev+0xd8/0x120
    [  189.265779]  do_syscall_64+0x48/0x130
    [  189.269586]  entry_SYSCALL_64_after_hwframe+0x44/0xa9
    [  189.274782] RIP: 0033:0x7f7a2662a2a3
    [  189.278501] Code: 64 89 01 48 83 c8 ff c3 66 2e 0f 1f 84 00 00 00 00 00 0f 1f 44 00 00 89 fa be 69 19 12 28 bf ad de e1 fe b8 a9 00 00 00 0f 05 <48> 3d 00 f0 ff ff 77 05 f3 c3 0f 1f 00 48 8b 15 b1 4b 2c 00 f7 d8
    [  189.297584] RSP: 002b:00007ffed7660078 EFLAGS: 00000206 ORIG_RAX: 00000000000000a9
    [  189.305376] RAX: ffffffffffffffda RBX: 000000004321fedc RCX: 00007f7a2662a2a3
    [  189.312663] RDX: 000000004321fedc RSI: 0000000028121969 RDI: 00000000fee1dead
    [  189.319944] RBP: 0000000000000000 R08: 0000000000000040 R09: 0000000000000005
    [  189.327224] R10: 0000000000000000 R11: 0000000000000206 R12: 0000000000000000
    [  189.334512] R13: 0000000000000000 R14: 0000000000000000 R15: 0000000000000000
    [  189.341794] ---[ end trace 4c38720b40d3b851 ]---

linux-5.4.46-337.bee

@@ -605,11 +605,11 @@ mee_configure() {
 	CONFIG_SERIAL_DEV_BUS=m
 	CONFIG_PRINTER=y
 	CONFIG_VIRTIO_CONSOLE=m
-	CONFIG_IPMI_HANDLER=y
-	CONFIG_IPMI_DEVICE_INTERFACE=y
-	CONFIG_IPMI_SI=y
-	CONFIG_IPMI_WATCHDOG=y
-	CONFIG_IPMI_POWEROFF=y
+	CONFIG_IPMI_HANDLER=m
+	CONFIG_IPMI_DEVICE_INTERFACE=m
+	CONFIG_IPMI_SI=m
+	CONFIG_IPMI_WATCHDOG=m
+	CONFIG_IPMI_POWEROFF=m
 	CONFIG_HPET=y
 	CONFIG_I2C_CHARDEV=m
 	CONFIG_I2C_AMD756=m