x86, NMI: Allow NMI reason io port (0x61) to be processed on any CPU

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In original NMI handler, NMI reason io port (0x61) is only processed
on BSP.  This makes it impossible to hot-remove BSP.  To solve the
issue, a raw spinlock is used to allow the port to be processed on any
CPU.

Originally-by: Huang Ying <ying.huang@intel.com>
Signed-off-by: Don Zickus <dzickus@redhat.com>
Signed-off-by: Peter Zijlstra <a.p.zijlstra@chello.nl>
LKML-Reference: <1294348732-15030-6-git-send-email-dzickus@redhat.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>

...

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Don Zickus 2011-01-06 16:18:51 -05:00 • committed by Ingo Molnar

parent c410b83077

commit ab846f13f6

1 changed files with 10 additions and 6 deletions

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arch/x86/kernel/traps.c

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