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Cyrill Gorcunov 3f4c3955ea x86, ioapic: Don't call disconnect_bsp_APIC if no APIC present 
Vegard Nossum reported:

[  503.576724] ACPI: Preparing to enter system sleep state S5
[  503.710857] Disabling non-boot CPUs ...
[  503.716853] Power down.
[  503.717770] ------------[ cut here ]------------
[  503.717770] WARNING: at arch/x86/kernel/apic/apic.c:249 native_apic_write_du)
[  503.717770] Hardware name: OptiPlex GX100
[  503.717770] Modules linked in:
[  503.717770] Pid: 2136, comm: halt Not tainted 2.6.30 #443
[  503.717770] Call Trace:
[  503.717770]  [<c154d327>] ? printk+0x18/0x1a
[  503.717770]  [<c1017358>] ? native_apic_write_dummy+0x38/0x50
[  503.717770]  [<c10360fc>] warn_slowpath_common+0x6c/0xc0
[  503.717770]  [<c1017358>] ? native_apic_write_dummy+0x38/0x50
[  503.717770]  [<c1036165>] warn_slowpath_null+0x15/0x20
[  503.717770]  [<c1017358>] native_apic_write_dummy+0x38/0x50
[  503.717770]  [<c1017173>] disconnect_bsp_APIC+0x63/0x100
[  503.717770]  [<c1019e48>] disable_IO_APIC+0xb8/0xc0
[  503.717770]  [<c1214231>] ? acpi_power_off+0x0/0x29
[  503.717770]  [<c1015e55>] native_machine_shutdown+0x65/0x80
[  503.717770]  [<c1015c36>] native_machine_power_off+0x26/0x30
[  503.717770]  [<c1015c49>] machine_power_off+0x9/0x10
[  503.717770]  [<c1046596>] kernel_power_off+0x36/0x40
[  503.717770]  [<c104680d>] sys_reboot+0xfd/0x1f0
[  503.717770]  [<c109daa0>] ? perf_swcounter_event+0xb0/0x130
[  503.717770]  [<c109db7d>] ? perf_counter_task_sched_out+0x5d/0x120
[  503.717770]  [<c102dfc6>] ? finish_task_switch+0x56/0xd0
[  503.717770]  [<c154da1e>] ? schedule+0x49e/0xb40
[  503.717770]  [<c10444b0>] ? sys_kill+0x70/0x160
[  503.717770]  [<c119d9db>] ? selinux_file_ioctl+0x3b/0x50
[  503.717770]  [<c10dd443>] ? sys_ioctl+0x63/0x70
[  503.717770]  [<c1003024>] sysenter_do_call+0x12/0x22
[  503.717770] ---[ end trace 8157b5d0ed378f15 ]---

|
| That's including this commit:
|
| commit 103428e57b
|Author: Cyrill Gorcunov <gorcunov@openvz.org>
|Date:   Sun Jun 7 16:48:40 2009 +0400
|
|    x86, apic: Fix dummy apic read operation together with broken MP handling
|

If we have apic disabled we don't even switch to APIC mode and do not
calling for connect_bsp_APIC. Though on SMP compiled kernel the
native_machine_shutdown does try to write the apic register anyway.

Fix it with explicit check if we really should touch apic registers.

Reported-by: Vegard Nossum <vegard.nossum@gmail.com>
Signed-off-by: Cyrill Gorcunov <gorcunov@openvz.org>
Cc: Yinghai Lu <yinghai@kernel.org>
LKML-Reference: <20090617181322.GG10822@lenovo>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
2009-06-17 20:24:39 +02:00
..
alpha Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-06-15 03:02:23 -07:00
arm Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-06-15 03:02:23 -07:00
avr32 Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-06-15 03:02:23 -07:00
blackfin Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/vapier/blackfin 2009-06-16 11:49:58 -07:00
cris Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic 2009-06-12 18:15:51 -07:00
frv FRV: Fix interaction with new generic header stuff 2009-06-13 13:17:28 -07:00
h8300 Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic 2009-06-12 18:15:51 -07:00
ia64 [IA64] fix compile error in arch/ia64/mm/extable.c 2009-06-15 09:17:50 -07:00
m32r Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic 2009-06-12 18:15:51 -07:00
m68k Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic 2009-06-12 18:15:51 -07:00
m68knommu module: cleanup FIXME comments about trimming exception table entries. 2009-06-12 21:47:05 +09:30
microblaze Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic 2009-06-12 18:15:51 -07:00
mips Merge branch 'i2c-for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/jdelvare/staging 2009-06-16 11:29:17 -07:00
mn10300 headers_check fix: mn10300, setup.h 2009-06-14 11:51:12 +05:30
parisc Merge branch 'master' of master.kernel.org:/pub/scm/linux/kernel/git/torvalds/linux-2.6 2009-06-15 03:02:23 -07:00
powerpc Merge branch 'merge' of git://git.kernel.org/pub/scm/linux/kernel/git/benh/powerpc 2009-06-16 11:30:37 -07:00
s390 [S390] s390: hibernation support for s390 2009-06-16 10:31:22 +02:00
sh Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic 2009-06-12 18:15:51 -07:00
sparc sparc64: Update defconfig. 2009-06-16 04:59:53 -07:00
um Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic 2009-06-12 18:15:51 -07:00
x86 x86, ioapic: Don't call disconnect_bsp_APIC if no APIC present 2009-06-17 20:24:39 +02:00
xtensa Merge branch 'for-linus' of git://git.kernel.org/pub/scm/linux/kernel/git/arnd/asm-generic 2009-06-12 18:15:51 -07:00
.gitignore
Kconfig mutex: have non-spinning mutexes on s390 by default 2009-04-09 19:28:24 +02:00