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This patch improves oprofile callgraphs for i386/x86_64. The old backtracing code was unable to produce kernel backtraces if the kernel wasn't compiled with framepointers. The code now uses dump_trace(). [ tglx: arch/x86 adaptation ] Signed-off-by: Jan Blunck <jblunck@suse.de> Signed-off-by: Andi Kleen <ak@suse.de> Signed-off-by: Ingo Molnar <mingo@elte.hu> Signed-off-by: Thomas Gleixner <tglx@linutronix.de>