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Subject[PATCH] i386: NMI <-> debugging handler adjustments
Also account for an INT3 breakpoint potentially placed (from a kernel
debugger) on sysenter_entry, which requires the NMI handler to add one
more check. Further, don't discard debug or breakpoint traps/faults
happening on this one instruction and their handler getting
interrupted by an NMI before being able to fix the stack.

From: Jan Beulich <jbeulich@novell.com>

(actual patch attached)

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