x86 mmiotrace: fix relay-buffer-full flag for SMP
Relay has per-cpu buffers, but mmiotrace was using only a single flag for detecting buffer full/not-full transitions. The new code makes this per-cpu and actually counts missed events. Signed-off-by: Pekka Paalanen <pq@iki.fi> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
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