Steven Rostedt (VMware) 6575257c60 tracing/samples: Fix creation and deletion of simple_thread_fn creation ... Commit 7496946a8 ("tracing: Add samples of DECLARE_EVENT_CLASS() and DEFINE_EVENT()") added template examples for all the events. It created a DEFINE_EVENT_FN() example which reused the foo_bar_reg and foo_bar_unreg functions. Enabling both the TRACE_EVENT_FN() and DEFINE_EVENT_FN() example trace events caused the foo_bar_reg to be called twice, creating the test thread twice. The foo_bar_unreg would remove it only once, even if it was called multiple times, leaving a thread existing when the module is unloaded, causing an oops. Add a ref count and allow foo_bar_reg() and foo_bar_unreg() be called by multiple trace events. Cc: stable@vger.kernel.org Fixes: 7496946a8 ("tracing: Add samples of DECLARE_EVENT_CLASS() and DEFINE_EVENT()") Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org>		2017-10-17 14:55:24 -04:00
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Makefile	tracing: update sample event documentation	2009-06-16 19:53:07 -04:00
trace-events-sample.c	tracing/samples: Fix creation and deletion of simple_thread_fn creation	2017-10-17 14:55:24 -04:00
trace-events-sample.h	tracing: Have the reg function allow to fail	2016-12-09 09:13:30 -05:00