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| author |   Jan Beulich <JBeulich@suse.com> | 2011-09-28 16:44:54 +0100 |
|---|---|---|
| committer |   Ingo Molnar <mingo@elte.hu> | 2011-09-28 19:01:53 +0200 |
| commit | 838312be46f3abfbdc175f81c3e54a857994476d (patch) | |
| tree | cbdcbe7deb2e6239d824f396de1a3a435078f09a /arch/x86/kernel/apic/probe_32.c | |
| parent | Linux 3.1-rc8 (diff) | |
| download | wireguard-linux-838312be46f3abfbdc175f81c3e54a857994476d.tar.xz wireguard-linux-838312be46f3abfbdc175f81c3e54a857994476d.zip | |
apic, i386/bigsmp: Fix false warnings regarding logical APIC ID mismatches
These warnings (generally one per CPU) are a result of
initializing x86_cpu_to_logical_apicid while apic_default is
still in use, but the check in setup_local_APIC() being done
when apic_bigsmp was already used as an override in
default_setup_apic_routing():
Overriding APIC driver with bigsmp
Enabling APIC mode: Physflat. Using 5 I/O APICs
------------[ cut here ]------------
WARNING: at .../arch/x86/kernel/apic/apic.c:1239
...
CPU 1 irqstacks, hard=f1c9a000 soft=f1c9c000
Booting Node 0, Processors #1
smpboot cpu 1: start_ip = 9e000
Initializing CPU#1
------------[ cut here ]------------
WARNING: at .../arch/x86/kernel/apic/apic.c:1239
setup_local_APIC+0x137/0x46b() Hardware name: ...
CPU1 logical APIC ID: 2 != 8
...
Fix this (for the time being, i.e. until
x86_32_early_logical_apicid() will get removed again, as Tejun
says ought to be possible) by overriding the previously stored
values at the point where the APIC driver gets overridden.
v2: Move this and the pre-existing override logic into
arch/x86/kernel/apic/bigsmp_32.c.
Signed-off-by: Jan Beulich <jbeulich@suse.com>
Acked-by: Tejun Heo <tj@kernel.org>
Cc: <stable@kernel.org> (2.6.39 and onwards)
Link: http://lkml.kernel.org/r/4E835D16020000780005844C@nat28.tlf.novell.com
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/kernel/apic/probe_32.c')
| -rw-r--r-- | arch/x86/kernel/apic/probe_32.c | 10 |
1 files changed, 2 insertions, 8 deletions
diff --git a/arch/x86/kernel/apic/probe_32.c b/arch/x86/kernel/apic/probe_32.c index b5254ad044ab..0787bb3412f4 100644 --- a/arch/x86/kernel/apic/probe_32.c +++ b/arch/x86/kernel/apic/probe_32.c @@ -200,14 +200,8 @@ void __init default_setup_apic_routing(void) * - we find more than 8 CPUs in acpi LAPIC listing with xAPIC support */ - if (!cmdline_apic && apic == &apic_default) { - struct apic *bigsmp = generic_bigsmp_probe(); - if (bigsmp) { - apic = bigsmp; - printk(KERN_INFO "Overriding APIC driver with %s\n", - apic->name); - } - } + if (!cmdline_apic && apic == &apic_default) + generic_bigsmp_probe(); #endif if (apic->setup_apic_routing) |