tracing: Fix ftrace stack trace entries
8 hex characters tell only half the tale for 64 bit CPUs, so use the appropriate length. Link: http://lkml.kernel.org/r/1332411501-8059-2-git-send-email-wolfgang.mauerer@siemens.com Cc: stable@vger.kernel.org Signed-off-by: NWolfgang Mauerer <wolfgang.mauerer@siemens.com> Signed-off-by: NSteven Rostedt <rostedt@goodmis.org>
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