tree 4334c97a3a8e2ac409444ecb2d7844d3a63e4118
parent 3fa7c794fe4dc127f7fac3fad4d13628e68f89ce
author Andi Kleen <ak@suse.de> 1159260754 +0200
committer Andi Kleen <andi@basil.nowhere.org> 1159260754 +0200

[PATCH] Don't access the APIC in safe_smp_processor_id when it is not mapped yet

Lockdep can call the dwarf2 unwinder early, and the dwarf2 code
uses safe_smp_processor_id which tries to access the local APIC page.
But that doesn't work before the APIC code has set up its fixmap.

Check for this case and always return boot cpu then.

Cc: jbeulich@novell.com
Cc: mingo@elte.hu

Signed-off-by: Andi Kleen <ak@suse.de>