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由 Pekka Paalanen 提交于
Allow a user to inject a marker (TRACE_PRINT entry) into the trace ring buffer. The related file operations are derived from code by Frédéric Weisbecker <fweisbec@gmail.com>. Signed-off-by: NPekka Paalanen <pq@iki.fi> Acked-by: NSteven Rostedt <rostedt@goodmis.org> Signed-off-by: NIngo Molnar <mingo@elte.hu>
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