x86/traps: Split int3 handler up
For code simplicity split up the int3 handler into a kernel and user part which makes the code flow simpler to understand. Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Reviewed-by: Alexandre Chartre <alexandre.chartre@oracle.com> Link: https://lkml.kernel.org/r/20200505135314.045220765@linutronix.de
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